Abrégé

A multi-robot collaborative planning method for machining a large capsule member of a spacecraft. The method comprises: for a multi-robot collaborative machining process of a large capsule member of a spacecraft, first, planning the number of instances of rotational displacement of a capsule, and the angle of each rotation; then, planning a multi-robot station layout and station switching strategy; and finally, when the position of the capsule and robot stations are fixed, planning a multi-robot machining task time sequence. By means of the method, the machining process of the large capsule member can be rapidly and systematically planned, and a scheme for the rotational displacement of the capsule and a scheme for the robot stations are rationally selected, thereby improving the rigidity of the collaborative operation of robots; and a machining time sequence is rationally planned, such that a multi-robot machining task process is more compact, and the idle time of the robots can be shortened, thereby improving the multi-robot collaborative machining efficiency.

Classes IPC  ?

• B25J 9/16 - Commandes à programme

Abrégé

A weaving and needling integrated preform formation method, comprising the following steps: moving a core mold (21) in a certain direction along an axis of a weaving machine (1) by arranging grabbing devices at two ends of the weaving machine (1), and at the same time, performing weaving to form a first layer of fabric (25) on the surface of the core mold (21); laying a mesh tire (26) above the first layer of fabric (25) by means of a mesh tire automatic laying device, and performing pre-needling on a mesh tire (26) layer by means of a needling device, so that the mesh tire (26) can fit the surface of woven fabric; activating the weaving machine (1) again, moving the core mold (21) in the opposite direction, and at the same time, performing weaving to form a second layer of fabric (28) on the surface of the mesh tire (26); repeating the above steps to realize alternate fitting of the multiple layers of woven fabric and the mesh tires (26); and finally, performing main-needling on a preform by means of the automatic needling device to realize Z-directional enhancement of the preform. Further provided is a preform formation device used to realize the weaving and needling integrated preform formation method.

Classes IPC  ?

• D04C 1/00 - Tresses ou dentelles, p.ex. dentelles aux fuseaux; Leurs procédés de fabrication
• D04C 3/00 - Métiers à tresses ou à dentelles
• D04C 3/48 - Dispositifs auxiliaires
• D04H 1/46 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes à partir de voiles ou couches composés de fibres ne possédant pas des propriétés cohésives réelles ou potentielles les voiles ou couches étant renforcées par des moyens mécaniques, p.ex. par roulage par aiguilletage ou opérations similaires pour provoquer l'enchevêtrement des fibres
• D04H 18/02 - Machines à aiguilleter avec des aiguilles

Abrégé

The present invention provides an unmanned aerial vehicle conflict detection method and apparatus of an airspace digital grid and a storage medium. The method comprises: establishing an airspace discrete subdivision grid model; constructing a grid coding rule and a conversion relationship of the longitude and latitude coordinates and grid codes; establishing an unmanned aerial vehicle safety protection area to perform gridding representation on an unmanned aerial vehicle in the airspace; establishing a coordinate system to convert the grid codes of the unmanned aerial vehicle into coordinates; utilizing a GJK algorithm to calculate a Minkowski difference set of two blocks; and determining whether the unmanned aerial vehicle conflicts or not according to the Minkowski difference set. By combining airspace grid codes with the GJK algorithm, compared with the traditional paired coordinate operation, the complexity of conflict detection can be effectively reduced, a large amount of calculation time can be saved, and the efficiency of unmanned aerial vehicle conflict detection can be effectively improved, to satisfy rapid real-time conflict detection requirements for the unmanned aerial vehicle in the airspace.

Classes IPC  ?

• G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu
• G01C 21/22 - Tables traçantes
• G06F 119/02 - Analyse de fiabilité ou optimisation de fiabilité; Analyse de défaillance, p.ex. performance dans le pire scénario, analyse du mode de défaillance et de ses effets [FMEA]

Abrégé

A multi-degree-of-freedom additive manufacturing based printing method for a helmet. The method comprises: first printing a helmet supporting mold (2) on the basis of the inner surface of a target helmet and by using water-soluble resin; on the basis of the thickness of a feature layer, performing curved-surface equidistant offset layering on a model of the target helmet from inside to outside starting from the inner surface; on the basis of the integrity of a curved-surface layer and by taking a substrate and protrusions as segmentation targets, performing region-by-region traversal and segmentation from inside to outside, and storing slice information; performing shaping processing for an inward shrinking wall thickness on all protruding regions which have been subjected to traversal and segmentation; on the basis of the settings of filling parameters, obtaining filling information of each layer of series curved surfaces of a target workpiece; by means of a multi-degree-of-freedom printing device, performing layer-by-layer filling on a supporting mold along a path setting, so as to complete printing of the target helmet; and finally, placing the helmet and the supporting mold together into a water tank, such that after the mold is dissolved, a final target helmet workpiece (1) is obtained. In the method, a new idea and a new method are provided for realizing additive manufacturing of a helmet workpiece which is of a complex curved-surface structure.

Classes IPC  ?

• B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux
• B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
• B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive

Abrégé

A stepless-adjustment efficient additive manufacturing device for a specially shaped rotary body sand mold, the device comprising an aluminum alloy frame (1), and an ink jet system, a shakeout device, a sand scraping device and a Z-axis rotary lifting movement system, which are arranged on the aluminum alloy frame. In the device, quantitative shakeout and uniform sand spreading are implemented on a rotary printing platform by keeping a shakeout box (7), a printing nozzle (3) and a sand scraping plate fixed, and the rotary printing platform can descend accurately and controllably by means of a ball screw (21) device, thereby spreading sand layer by layer and performing printing layer by layer; in addition, the height by which the rotary platform descends is adjusted steplessly, and resin saturation between molding sand particles is adjusted according to a micro-droplet jet printing grayscale, thereby improving the overall printing speed and strength of a sand mold. Further disclosed is a stepless-adjustment efficient additive manufacturing method for a specially shaped rotary body sand mold. The device achieves, with stepless heightwise adjustment, 3D printing of a specially shaped rotary body sand mold. When manufacturing specially shaped rotary bodies, the specially shaped rotary body sand mold has a high forming efficiency and can manufacture specially shaped rotary bodies with a good quality; in addition, the process cost and waste are reduced.

Classes IPC  ?

• B22C 9/02 - Moules en sable ou moules analogues pour pièces coulées
• B33Y 10/00 - Procédés de fabrication additive
• B22C 19/04 - Dispositifs de commande particuliers pour machines à mouler
• B22C 19/02 - Tables de moulage

Abrégé

Disclosed in the present invention is a low-light image enhancement method based on reinforcement learning and aesthetic evaluation. The method comprises: firstly, generating images of an abnormal brightness in different illumination scenes, and constructing a training data set of a reinforcement learning system on the basis of the images; then initializing the training data set, a policy network and a value network in the reinforcement learning system, and updating the policy network and the value network on the basis of a non-reference reward value and an aesthetic evaluation reward value; and outputting an enhanced image result after training is completed. By means of the present invention, an action space range which is defined in reinforcement learning is expanded, such that an enhancement operation which is obtained by an input low-light image has a larger dynamic range, thereby achieving higher flexibility for a real scene, and low-light image enhancement requirements in the real scene can thus be better satisfied. In addition, scores of aesthetic quality evaluations are introduced as a part of a loss function, so that an enhanced image has a better visual effect and a better subjective user evaluation score.

Classes IPC  ?

• G06T 5/00 - Amélioration ou restauration d'image
• G06T 7/90 - Détermination de caractéristiques de couleur
• G06N 20/00 - Apprentissage automatique

Abrégé

An extreme high-temperature in-situ tenon joint fretting fatigue experimental apparatus, comprising: a loading member (100) used for supporting a tenon test piece (001) and a mortise test piece (002), and applying periodic reciprocating horizontal fatigue load to the tenon test piece (001); a heating member (200) provided below the tenon test piece (001) and the mortise test piece (002) and used for heating the tenon test piece (001) and the mortise test piece (002); a thermal insulation sleeve (300) wrapping the heating member (200); and a control member (400) used for controlling on or off of the loading member (100) and the heating member (200) to apply horizontal fatigue load to the tenon test piece (001) and heating the tenon test piece (001) and the mortise test piece (002). Hot electrons entering a detector are reduced by using a variety of measures, thereby improving the imaging quality of an in-situ scanning electron microscope in an extreme high-temperature environment, and improving the upper limit of experimental temperature. The problem that the high-temperature imaging quality is degraded, the image is whitened, and effective information cannot be observed and the like due to the fact that hot electrons generated by a heating apparatus or a sample in a high-temperature environment interfere with collection of signal electrons performed by the detector is solved.

Classes IPC  ?

• G01N 3/36 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts répétés ou pulsatoires engendrés par des moyens pneumatiques ou hydrauliques
• G01N 3/02 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique - Parties constitutives
• G01N 3/04 - Mandrins
• G01N 1/44 - Traitement d'échantillons mettant en œuvre un rayonnement, p.ex. de la chaleur
• G01N 23/2251 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p.ex. rayons X ou neutrons, non couvertes par les groupes , ou en mesurant l'émission secondaire de matériaux en utilisant des microsondes électroniques ou ioniques en utilisant des faisceaux d’électrons incidents, p.ex. la microscopie électronique à balayage [SEM]

Abrégé

The present invention provides a method for preparing a negative-pressure film-coated frozen sand mold. The method for preparing the frozen sand mold comprises the following steps: numerical control processing is directly performed on a frozen sand blank to obtain a sand mold cavity; a softened thin film is coated on the surface of the sand mold cavity coated with a heat insulation coating, and meanwhile, a back film is coated on the outer surface of the sand mold to close a sand box; an air extraction sand box provided with a vacuum air chamber is used for fixing the frozen sand mold, air extraction is performed by means of a vacuum pump, and the thin film is tightly attached to the sand mold by means of vacuum suction force; and the whole sand mold is obtained after boxes are combined, negative pressure is kept, and a casting is poured in a normal-temperature or low-temperature environment. The method is environment-friendly and green, and the prepared frozen sand mold is high in strength and convenient to clear sand; the volume of gas generated in the pouring process is small, metal is rapidly solidified, and castings having good internal quality, high size precision, and excellent surface quality can be produced.

Classes IPC  ?

• B22D 18/06 - Coulée par le vide, c. à d. utilisant le vide pour remplir le moule

Abrégé

A high-flexibility multi-region sand-spreading device for multi-material sand-mold printing. The sand-spreading device comprises a printing mechanism (1), a compaction mechanism (2), a vibratory sand-spreading mechanism (3), a machine base ball-screw mechanism (4), a supporting plate (5), a machine base (6) and a ball-screw mechanism (17), wherein the vibratory sand-spreading mechanism, the compaction mechanism and the printing mechanism are mounted on the supporting plate, and jointly slide on the machine base ball-screw mechanism during printing, so as to sequentially complete sand-spreading, compaction and printing operations in a printing region; a sand-spreading box (13) of the vibratory sand-spreading mechanism and a follow-up sand-spreading mechanism are connected to the ball-screw mechanism by means of a moving slide table to achieve two-dimensional movement, and a pressing plate (22) of the compaction mechanism controls lifting by using an electric pushing cylinder (19), a lifting guide column (20) and a bearing (23), so as to achieve a compaction operation after sand-spreading; and the printing mechanism comprises a nozzle transverse beam component (24), a drag chain (25), a transverse base (26) and a print head component (27), and the print head component is driven by the transverse base and the drag chain to achieve two-dimensional movement printing. Further provided is a high-flexibility multi-region sand-spreading method for multi-material sand-mold printing. By means of the device and the method, the printing precision and the flexibility manufacturing capability of multi-material sand-mold integral printing and forming equipment can be improved.

Classes IPC  ?

• B22C 9/02 - Moules en sable ou moules analogues pour pièces coulées
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet

Abrégé

The present invention relates to the field of computer numerical simulation, and provides a helicopter flow field numerical simulation system and method based on a graphics processing unit (GPU). The helicopter flow field numerical simulation system comprises a central processing unit (CPU) (1) and a GPU (2); the CPU (1) is used to: initialize a motion nested grid according to a preset configuration file and a helicopter grid file to be simulated (S1); determine surface batch information according to grid blocks in the motion nested grid (S2); and determine a nested interpolation relationship and an interpolation mapping index between the grid blocks according to the helicopter grid file to be simulated at a current simulation moment, and perform flow field information interaction among the grid blocks according to the nested interpolation relationship, the interpolation mapping index, and flow field information of the grid blocks to obtain flow field information of the helicopter to be simulated (S4); and the GPU (2) is used to calculate the flow field information of the grid blocks in the motion nested grid according to the surface batch information by using a computational fluid dynamics (CFD) method (S3). The CPU and the GPU are combined, such that the simulation efficiency of a helicopter flow field is improved.

Classes IPC  ?

• G06F 30/28 - Optimisation, vérification ou simulation de l’objet conçu utilisant la dynamique des fluides, p.ex. les équations de Navier-Stokes ou la dynamique des fluides numérique [DFN]

Abrégé

A nozzle-replaceable print head for continuous fiber printing, and a printing method. The print head comprises a fixing support (0200), a wire feeding module (0300) located on the upper part of a structure, an upper guide tube (0400), a shearing module (0500) located at the middle of the structure, a lower guide tube (0600), a heat dissipation sleeve (0700), a throat tube (0800), a heating coil (0900), and a nozzle module (1000) located at the bottom of the structure, wherein a continuous fiber-reinforced thermoplastic resin-based pre-impregnated composite wire (0100) coaxially passes through the print head from the other side from top to bottom and is fed for printing. By providing an adjusting groove having a scale indicator, clamping and feeding states of pre-impregnated composite wires (0100) of different specifications are standardized and adjusted; and by providing the upper guide tube (0400) and the half-wrapped lower guide tube (0600), the shearability of the pre-impregnated wires and the subsequent feeding of the broken wires are improved, so that high-efficiency and high-quality formation of a workpiece is achieved, and heterogeneous multi-layer forming printing of a workpiece having a specific application requirement can be achieved.

Classes IPC  ?

• B29C 64/209 - Têtes; Buses
• B29C 64/118 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant un matériau filamentaire mis en fusion, p.ex. modélisation par dépôt de fil en fusion [FDM]
• B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive

Abrégé

Disclosed in the present invention is a composite material filament melt impregnation device having an automatically-liftable flow channel used for additive manufacturing, which comprises a mechanically lifting device, a heating device, a curved resin impregnation flow channel, a filament-guiding block, a single-screw extruder, a replaceable combined mold nozzle and a resin riser. The present invention can greatly improve the efficiency of replacing filaments and dealing with broken filaments during a continuous fiber filament forming process, thereby reducing the operation difficulty in the production process and guaranteeing the safety of operators. By designing the resin riser, the internal pressure of a melt cavity can be dynamically adjusted within a small range during the production process, so that the product quality stability is improved, and finally, the continuous production and rapid replacement of high-performance continuous fiber composite material filaments are achieved.

Classes IPC  ?

• B29B 11/10 - Moulage par extrusion
• B29B 11/16 - Fabrication de préformes caractérisées par la structure ou la composition comprenant des charges ou des agents de renforcement
• B29C 64/314 - Préparation
• B33Y 40/10 - Prétraitement

Abrégé

Provided in the present invention are a porous sealing plate and a preparation method therefor, which belong to the technical field of sealing plates. The porous sealing plate comprises an enclosure frame, a core material, a getter and a membrane material, wherein the getter is located in the core material, and the core material has an aperture and is an inorganic powder and/or fiber; the enclosure frame has a continuous outline structure, is made of an engineering plastic, and is located at the periphery of the core material, the aperture of the core material or both the periphery and the inner aperture of the core material; the membrane material is an aluminum-plastic composite membrane, a polyimide composite membrane, a metallized membrane or an inorganic non-metal coated plastic composite membrane; and the membrane material wraps the surface of the core material. By controlling the enclosure frame structure of an engineering plastic, the free design of the appearance and the inner aperture structure of a porous sealing plate having a complex structure is achieved, a breakthrough is made to the single and unchanged structural appearance characteristic caused by vacuum sealing of a traditional porous sealing plate, the porous sealing plate can adapt to the heat preservation and heat insulation of a complex structure, and the application range thereof is widened; moreover, the flatness of the appearance or the inner aperture of the porous sealing plate is improved by the enclosure frame of the engineering plastic, and the porous sealing plate is not prone to deformation.

Classes IPC  ?

• F16L 59/065 - Dispositions utilisant une couche d'air ou le vide utilisant le vide

Abrégé

A variable track-based blockage-resistant scheduling policy for an OHT transport system. The policy comprises: according to a task scheduling method, allocating a policy to an OHT trolley, and determining the shortest path and track change points in the path according to a path planning method; according to a travel time prediction method, predicting the time at which the trolley passes each track change point, and sorting the times. The trolley executes a task according to a planned path, and a variable track changes tracks in advance according to the passing sequence and trolley status, and waits for the trolley to pass; when the trolley reaches a target station point, a station track moves to a working state, a stopper block operates, and the trolley starts loading or unloading; after the trolley completes loading or unloading and a preparation track of the station track has no trolley, the stopper block is released, and the station track moves to an idle state; finally, when the trolley completes the task, the system state is updated. According to the method, a variable track and a station track are employed, solving the problems in the existing technology of the utilization rate of fixed track resources being low and station points being blocked.

Classes IPC  ?

• G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"

Abrégé

An ultrasound-assisted penetration and uniform forming device for freezing and printing a liquid drop. The ultrasound-assisted penetration and uniform forming device for freezing and printing a liquid drop comprises an array nozzle (2), a sand spreading device (1), an ultrasonic generator (3), a transducer (4), an amplitude transformer (5) and a low-temperature forming chamber (6). The ultrasonic generator uses a low-frequency ultrasonic wave of 20 KHz, and a nodal surface of the amplitude transformer is provided with a flange plate and is connected to an outer cavity wall of the low-temperature forming chamber by means of threads. An ultrasound-assisted penetration and uniform forming method for freezing and printing a liquid drop. In a sand spreading process, a frequency of an ultrasonic generator is adjusted to uniformly distribute pre-spread molding sand particles subjected to ultrasonic vibration; and when a pure water binder is sprayed, a liquid drop is sprayed to a surface of pre-mixed molding sand, and the liquid drop penetrates to the bottom of pre-cooled molding sand to freeze and solidify under the assistance of a low-frequency ultrasonic wave. By means of the method, sand mold freezing and 3D printing is carried out, the sand spreading is compact and uniform, liquid drop penetration is sufficient, and the forming precision of sand mold freezing and printing is accurate and controllable.

Classes IPC  ?

• B22C 9/02 - Moules en sable ou moules analogues pour pièces coulées
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
• B33Y 10/00 - Procédés de fabrication additive
• B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau

Abrégé

An electrowetting effect-based solar-driven high efficiency humidification system and a working method. A photovoltaic power generation module and an electrowetting high efficiency humidification module are combined, which conform to a solar energy transfer principle in a PV/T device, while liquid droplets are also sprayed at regular intervals on an upper surface of a heat exchange flow channel in the PV/T device, the principles of acceleration of liquid droplet internal flow and a change to surface hydrophilicity/hydrophobicity by electrowetting technology are used, liquid drop evaporation is accelerated, and highly efficient humidification of air is achieved. By means of coupled utilization of electrowetting technology and a PV/T system, water is saved while a large amount of moist air and clean electric energy which can be used for actual production are obtained.

Classes IPC  ?

• F24F 6/08 - Humidification de l'air par évaporation d'eau dans l'air en utilisant des éléments humides chauffés
• F24F 3/14 - Systèmes de conditionnement d'air dans lesquels l'air conditionné primaire est fourni par une ou plusieurs stations centrales aux blocs de distribution situés dans les pièces ou enceintes, blocs dans lesquels il peut subir un traitement secondaire; Appareillage spécialement conçu pour de tels systèmes caractérisés par le traitement de l'air autrement que par chauffage et refroidissement par déshumidification

Abrégé

A virtual strain energy-based metal material multi-axis fatigue life prediction method and system, belonging to the field of life prediction of metal materials for additive manufacturing. The method comprises: carrying out finite element analysis on a metal component, determining a dangerous point, and solving a stress-strain load-time history at the dangerous point; calculating shear strain energy in each plane passing the dangerous point, taking the plane having the maximum shear strain energy as a critical plane, and obtaining the shear strain energy and a multi-axis stress ratio on the critical plane; and calculating virtual strain energy at the dangerous point and using a shear strain energy life curve under a torsion load to perform life prediction, the virtual strain energy being strain energy obtained after normalization processing is performed on shear strain energy in the shear strain energy life curve under a single-axis tension-compression load and the torsion load. The method considers the influences of a load path on damage parameter coefficients and exponents at the same time, simply determines parameters, and can be suitable for fatigue life analysis of low-cycle and high-cycle fatigues under different load paths at the same time.

Classes IPC  ?

• G06F 30/17 - Conception mécanique paramétrique ou variationnelle

Abrégé

The embodiments of the present application relate to the technical field of electronics. Provided are a switched capacitor converter (SC) and an electronic device, which can freely switch various buck ratios. In the SC, a first end of a first switched circuit is connected to a power supply end, a second end of the first switched circuit is connected to a first end of a third capacitor, a third end of the first switched circuit is connected to a first end of a second switched circuit and a first end of a first capacitor, a fourth end of the first switched circuit is connected to a first end of a second capacitor, and a fifth end of the first switched circuit is connected to a first end of a third switched circuit, a first end of a fourth switched circuit and a first end of a fourth capacitor; a second end of the third capacitor is connected to a second end of the second switched circuit, and a third end of the second switched circuit is grounded; and a second end of the second capacitor is connected to a second end of the third switched circuit, a third end of the third switched circuit is grounded, a second end of the first capacitor is connected to a second end of the fourth switched circuit, a third end of the fourth switched circuit is grounded, and a second end of the fourth capacitor is grounded.

Classes IPC  ?

• H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique

Abrégé

Provided in the present invention is a helicopter rotor manipulation device based on the pitch varying of a hydraulic torsion tube. The helicopter rotor manipulation device comprises a blade structure, a variable-pitch clamp system and a hydraulic system. The blade structure comprises blades, clamps and a rotor hub, which are connected in sequence by fasteners, wherein the rotor hub is connected to a rotor spindle. In the variable-pitch clamp system, a variable-pitch sleeve is located between a fixed rotor clamp and a rotating rotor clamp, an outer end face of the variable-pitch sleeve is fixedly connected to the rotating rotor clamp, and an inner end face of the variable-pitch sleeve is fixedly connected to the fixed rotor clamp. When the pressure inside the variable-pitch sleeve changes, a torsion angle generated at two ends of the variable-pitch sleeve drives the rotating rotor clamp to be angularly displaced, such that the angle of attack of the blades is controlled. The present invention uses a design having no auto-bank unit, such that the structure is simplified, and the reliability of a rotor system is improved. Meanwhile, the number of manipulation structures can also be reduced, thereby reducing the weight of the structure and maintenance costs, and further improving the reliability of a helicopter.

Classes IPC  ?

• B64C 11/38 - Mécanismes de changement de pas des pales par fluide, p.ex. hydrauliques

Abrégé

The present invention relates to a distributed pumped two-phase cooling system for an aircraft. In the cooling system, a liquid storage tank, a precooling device, a pump, a flow meter, a preheater, a first valve group, a heat source group, a condensing device, a reheater, and the liquid storage tank are successively connected, and a first sensor group is arranged on the liquid storage tank; a second sensor group is arranged between the precooling device and the pump, and a third sensor group is arranged between the preheater and the first valve group; a fifth sensor group is arranged on the heat source group; a sixth sensor group and a seventh sensor group are both arranged between the heat source group and the condensing device; a fourth sensor group is arranged between the reheater and the liquid storage tank, and a controller is connected to the sensor groups, the precooling device, the pump, the preheater, the reheater, the first valve group, and the condensing device, respectively. The present invention can solve the problem of collaborative heat dissipation of aircraft-borne apparatuses.

Classes IPC  ?

• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage

Abrégé

The present invention belongs to the technical field of power electronics. Disclosed are a magnetic integrated matrix transformer and an isolated DC/DC converter. The magnetic integrated matrix transformer comprises a magnetic core, a primary winding, a secondary winding and a rectification unit, wherein the magnetic core is provided with a base; a middle column and at least three side columns are formed on the base; at least one secondary winding is wound on the magnetic core; each secondary winding is at least wound on two adjacent side columns; and the middle column is used for winding the primary winding. By means of the present invention, a secondary winding structure of a transformer is flexibly configured without changing a magnetic core, and any turn ratio of the transformer and the output of any number of paths of secondary sides are realized, such that the volume and weight of the transformer can be reduced, thereby increasing the power density of a converter; and the requirements of the converter for frequency ranges in different operating occasions can also be met, such that a magnetic part has flexibility and universality. Moreover, secondary windings of the transformer also have a current equalization effect when being arranged in an orthogonal manner, and a good heat dissipation effect can also be achieved using a metal shell wrapping the magnetic core.

Classes IPC  ?

• H01F 27/24 - Noyaux magnétiques
• H01F 27/30 - Fixation ou serrage de bobines, d'enroulements ou de parties de ceux-ci entre eux; Fixation ou montage des bobines ou enroulements sur le noyau, dans l'enveloppe ou sur un autre support
• H02M 3/22 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif

Abrégé

The present invention relates to an impact damage numerical simulation optimization method based on laser mapping of an entity grid, which method relates to the field of impact damage reproduction, impact damage tolerance and maintainability assessment of aero-engine blades. The method comprises: after a light-gas gun is used to fire a bullet to impact a sample grid area to obtain an impact damage, measuring an impact damage size, a damage contour, and a surface residual strain and a surface residual stress of an entity grid unit around the damage; establishing a parameterized impact finite element model, so as to obtain a numerically simulated impact damage size, a numerically simulated impact damage contour, and a numerically simulated surface residual strain and surface residual stress of the surface entity grid unit; calculating the relative errors between the impact damage size, the damage contour, the surface residual strain and the residual stress, which are actually measured in a test, and the impact damage size, the damage contour, the surface residual strain and the residual stress, which are numerically simulated; and determining whether each relative error is smaller than an expected value until a numerical simulation result meeting a precision requirement is obtained. By means of the present invention, the numerical simulation precision problem of impact damage geometry and internal residual stress is solved.

Classes IPC  ?

• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]

Abrégé

The present invention provides a method and device for forming a continuous fiber composite material by combining additive and subtractive manufacturing. According to the present invention, a resin filament and a continuous fiber are fed into a printing head and are melt and deposited, to first form a continuous fiber reinforced composite material by additive manufacturing by means of melt deposition forming; and after forming is completed, size and morphology data acquisition is performed to obtain the actual size of a part; a subtractive path is planned, and subtractive forming is carried out by a laser. According to the present invention, additive and subtractive forming is used for the continuous fiber composite material, additive forming is carried out by means of melt deposition, laser subtractive machining is performed, so that a device structure is simplified, machining stress and mechanical deformation are reduced, three-dimensional measurement and subtractive planning are carried out on the part, the automation degree is improved, and forming precision of the part made of the continuous fiber composite material is comprehensively improved.

Classes IPC  ?

• B29C 64/112 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant des gouttelettes individuelles, p.ex. de buses de jet
• B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
• B29C 64/118 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant un matériau filamentaire mis en fusion, p.ex. modélisation par dépôt de fil en fusion [FDM]
• B29C 64/20 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet
• B33Y 10/00 - Procédés de fabrication additive
• B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet

Abrégé

The present application provides an actuator, a driving apparatus, a camera module, and an electronic device. The actuator comprises a metal plate, a first piezoelectric ceramic, and a second piezoelectric ceramic. The metal plate comprises a vibrating portion and a connecting portion. The vibrating portion is connected to a peripheral side surface. The first piezoelectric ceramic is fixed to the top surface, and the second piezoelectric ceramic is fixed to the bottom surface. The polarization direction of the first piezoelectric ceramic and the polarization direction of the second piezoelectric ceramic are the same as a direction in which the second piezoelectric ceramic, the metal plate, and the first piezoelectric ceramic are stacked. The top surface of the first piezoelectric ceramic and the bottom surface of the second piezoelectric ceramic are used for be electrically connected to a first electrode end of a power supply. The bottom surface of the first piezoelectric ceramic and the top surface of the second piezoelectric ceramic are used for being electrically connected to a second electrode end of the power supply. The actuator of the present application has a simple excitation structure.

Classes IPC  ?

• H02N 2/02 - Machines électriques en général utilisant l'effet piézo-électrique, l'électrostriction ou la magnétostriction produisant un mouvement linéaire, p.ex. actionneurs; Positionneurs linéaires

Abrégé

bfthbthfthbb; establishing a creep damage constitutive model, which comprises a strain rate formula and a damage rate formula; obtaining, by means of solution, an evolution behavior of a strain deformation over time; and obtaining, by means of solution, an evolution behavior of damage over time. In the method, modeling is performed for creep average deformation and damage behaviors under the same condition, and the situation of a median under the condition is represented. In the method, parameters have a clear stress-temperature correlation relationship, such that the disadvantage of a traditional creep damage constitutive model being difficult to extrapolate is overcome, and the accurate extrapolation can be realized; and the method has high prediction precision.

Classes IPC  ?

• G01N 3/18 - Exécution de tests à des températures élevées ou basses

Abrégé

An active helicopter noise suppression apparatus integrating an acoustic array and in-blade control. The apparatus comprises an annular loudspeaker array (101), a plurality of force exciters (102), an error microphone (103), an active noise cancellation (ANC) controller (104), a cockpit sensor (105) and an onboard computer (106). By means of providing the annular loudspeaker array (101) on a rotor blade hub and arranging the unsteady force exciters (102) on the rear edges of blades, a sound field, the sound waves in which are in an inverted phase with respect to an original sound field, is constructed by using the ANC control principle, such that noise is canceled, thereby achieving noise cancellation of universal helicopter noises of all types.

Classes IPC  ?

• G06F 30/15 - Conception de véhicules, d’aéronefs ou d’embarcations
• G06F 30/28 - Optimisation, vérification ou simulation de l’objet conçu utilisant la dynamique des fluides, p.ex. les équations de Navier-Stokes ou la dynamique des fluides numérique [DFN]
• G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférence; Masquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
• G06F 119/10 - Analyse du bruit ou optimisation du bruit

Abrégé

A method for estimating the thermal conductivity coefficient of a carbon fiber toughened ceramic matrix composite material under high-temperature oxidation, the method comprising: obtaining a geometric structural characteristic change rule for when the material is oxidized, and introducing oxidation gap depth characteristics into an RVE model to obtain a modified RVE model containing oxidation characteristics; dividing the modified RVE model into five characteristic areas along the axial direction of the fiber, respectively establishing an equivalent axial thermal resistance for each characteristic area, connecting in series the axial thermal resistances of the five areas so as to obtain an overall axial thermal resistance network of the material, and solving to obtain an axial thermal conductivity coefficient; performing similar area division in the modified RVE model to solve for a transverse thermal conductivity coefficient. The thermal conductivity coefficient of the material can thus be predicted under different oxidation temperature and oxidation time conditions.

Classes IPC  ?

• G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu

Abrégé

An aircraft cockpit heating system, comprising a lubricating oil system and a vapor cycle system. The vapor cycle system comprises a heat exchanger (2) and a refrigerant-lubricating oil heat exchanger (3), wherein the heat exchanger is arranged in a cockpit (1); an inlet of the heat exchanger is in communication with a refrigerant outlet of the refrigerant-lubricating oil heat exchanger; a refrigerant inlet of the refrigerant-lubricating oil heat exchanger is in communication with an outlet of the heat exchanger; an oil inlet of the refrigerant-lubricating oil heat exchanger is in communication with an oil outlet of the lubricating oil system; and an oil inlet of the lubricating oil system is in communication with an oil outlet of the refrigerant-lubricating oil heat exchanger. The system can reduce aircraft fuel consumption, increase the fuel utilization rate and reduce carbon emissions.

Classes IPC  ?

• B64D 13/08 - Aménagements ou adaptations des appareils de conditionnement d'air pour équipages d'aéronefs, passagers ou pour emplacement réservé au fret l'air étant climatisé l'air étant réchauffé ou refroidi
• F25B 41/40 - Agencements de conduites de fluide

Abrégé

Disclosed are a thermal infrared vision-based parking apron human body action recognition method and system. The method comprises: obtaining a plurality of video sequences from an infrared monitoring video; performing target frame labeling on a set target in each image frame in the video sequences; for each image frame in the video sequences, capturing an enlarged region of a target frame according to the labeled target frame; adding position information of labeled images of the target frames to the enlarged regions of the target frames to obtain three-way channel sub-images; the three-way channel sub-images forming a three-way channel sub-image sequence according to a time sequence; training an action recognition model by using the three-way channel sub-image sequence corresponding to the plurality of video sequences as a training set; obtaining from the infrared monitoring video a video sequence to be recognized, and obtaining a three-way channel sub-image sequence corresponding to the video sequence to be recognized; and inputting the three-way channel sub-image sequence corresponding to the video sequence to be recognized into the trained action recognition model to output a target action type. In the present invention, the recognition precision of human body actions in a complex environment is improved.

Classes IPC  ?

• G06V 40/20 - Mouvements ou comportement, p.ex. reconnaissance des gestes

Abrégé

Disclosed is an anti-deadlock dispatching method for an OHT system. Firstly, when an OHT system satisfies a task allocation triggering condition, system information is acquired; secondly, whether a set of idle vehicles and a set of tasks to be allocated of the system are empty is determined, and when the set of idle vehicles and the set of tasks to be allocated are not empty, task allocation is completed according to a task scheduling method; thirdly, on the basis of an order of tasks in a task allocation scheme, path planning is performed on the tasks in sequence by using an online path planning method; according to an allocated task and a planned path, a vehicle starts to execute the task, and performs collision avoidance according to a traffic management and control strategy; finally, when the vehicle completes the task, the idle vehicle is dispatched according to an anti-congestion strategy, and a system state is updated. This method solves the problems in the prior art of low system efficiency and poor punctuality caused by neglecting the coupling relationship among task scheduling, traffic management and control, and path planning, and improves the overall efficiency of the system.

Classes IPC  ?

• G05B 19/418 - Commande totale d'usine, c.à d. commande centralisée de plusieurs machines, p.ex. commande numérique directe ou distribuée (DNC), systèmes d'ateliers flexibles (FMS), systèmes de fabrication intégrés (IMS), productique (CIM)

Abrégé

A high supersonic aircraft leading edge thermal protection design method based on a three-dimensional orthogonal woven composite material, belonging to the technical field of engineering thermophysics, and can effectively reduce the leading edge temperature while not increasing cooling measures. In the method, first, establishing a multivariable linear regression model, and finding a theoretical optimization heat conduction configuration of the leading edge, such that the temperature of a leading edge part is effectively reduced; second, establishing a general calculation formula suitable for calculating anisotropic thermal conductivity coefficients of different woven structures of a three-dimensional orthogonal woven ceramic matrix composite material, and the general calculation formula being used for guiding a mesoscopic woven structure of the three-dimensional orthogonal woven ceramic matrix composite material; finally, directly combining the optimization result obtained by the multivariable linear regression model with the general formula, so as to design the mesoscopic weaving structures required by different areas, thereby achieving collaborative design of the leading edge macroscopic temperature optimization and the mesoscopic weaving structure of the three-dimensional orthogonal woven ceramic matrix composite material.

Classes IPC  ?

• G06F 30/15 - Conception de véhicules, d’aéronefs ou d’embarcations
• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
• G06F 113/26 - Composites
• G06F 119/08 - Analyse thermique ou optimisation thermique

Abrégé

The present invention relates to the field of new concept unsteady combustion. Disclosed are an isolated section shock wave forward propagation suppression structure for an internal combustion wave rotor, and an internal combustion wave rotor. The isolated section shock wave forward propagation suppression structure for an internal combustion wave rotor comprises a wave rotor and a gas inlet port; a sealing disc is provided on the end of the gas inlet port facing the wave rotor; an end portion of the wave rotor closely contacts the sealing disc; the sealing disc is provided with a fan-shaped hole; the wave rotor is provided with a plurality of wave rotor channels; an isolated section sleeve is provided in the gas inlet port; a pneumatic valve is provided in the isolated section sleeve; the pneumatic valve has two valve plates; free ends of the two valve plates are provided facing the wave rotor and are far away from each other; and when the wave rotor rotates, the plurality of wave rotor channels are sequentially communicated with the isolated section sleeve through the fan-shaped hole. The present invention implements the suppression of reflected shock waves by changing a flow blockage ratio and the shape of a pneumatic valve to deplete back propagation pressure, thereby facilitating a fuel inlet process, and implementing stable work of an internal combustion wave rotor under a state of departing from a design point.

Classes IPC  ?

• F02C 3/14 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de produits de combustion comme fluide de travail caractérisés par l'aménagement de la chambre de combustion dans l'ensemble
• F02C 7/04 - Entrées d'air pour ensembles fonctionnels de turbines à gaz ou de propulsion par réaction
• F02C 7/22 - Systèmes d'alimentation en combustible
• F23R 3/28 - Chambres de combustion à combustion continue utilisant des combustibles liquides ou gazeux caractérisées par l'alimentation en combustible

Abrégé

An electro-hydraulic integrated steering system and a multi-parameter coupling optimization method thereof. The electro-hydraulic integrated steering system comprises a mechanical transmission module, an electric power assisted module, a hydraulic power assisted module, and a control module. A design scheme in which the electric power assisted mechanism is integrated at the bottom of an original hydraulic system steering gear, an original worm gear and worm speed reducer is replaced with a planetary gear speed reducer (18), and a mechanical rotary valve structure in an original hydraulic power assisted mechanism is reserved is adopted. On one hand, the electric and hydraulic mechanisms are highly integrated, and energy consumption can be reduced by the cooperative operation; on the other hand, the road surface information can be fed back in real time, thereby providing clear road feel for a driver. In addition, the system further has the advantages that a plurality of execution mechanisms are redundant with each other, the planetary gear speed reducer (18) eliminates the hidden danger of system jamming, low failure rate of the mechanical rotary valve structure is reserved, etc., and multi-parameter coupling optimization is performed on the system, so that the system economy can be maximized while the cost, reliability and road feel are guaranteed.

Classes IPC  ?

• B62D 5/06 - Direction assistée ou à relais de puissance à fluide, c. à d. au moyen d'un fluide sous pression produisant toute la force nécessaire, ou la plus grande partie de celle-ci, pour commander la direction du véhicule
• B62D 5/04 - Direction assistée ou à relais de puissance électrique, p.ex. au moyen d'un servomoteur relié au boîtier de direction ou faisant partie de celui-ci
• B62D 6/00 - Dispositions pour la commande automatique de la direction en fonction des conditions de conduite, qui sont détectées et pour lesquelles une réaction est appliquée, p.ex. circuits de commande
• B62D 3/02 - Boîtiers de direction mécaniques

Abrégé

Provided are an intelligent auxiliary power steering system using braking energy, and a control method, the system comprising: a torque sensor, a brake pedal, a brake pedal pressure sensor, a vehicle speed sensor, a steering wheel (1), a steering column assembly, a hydraulic power assisting apparatus, an auxiliary hydraulic power assisting apparatus, a plunger pump clutch apparatus, and a main controller. When braking occurs in a vehicle, the kinetic energy of the vehicle can be used to, by means of ground friction force, drive vehicle wheels to rotate, a transmission output shaft (20) can be driven to rotate by means of a vehicle transmission system, and a plunger pump (10) can be driven by means of the plunger pump clutch apparatus to pump hydraulic oil into a steering gear (3), thus, when braking occurs in the vehicle, the steering system can be provided with power assistance, power consumed by a motor is reduced, and energy is saved.

Classes IPC  ?

• B62D 5/06 - Direction assistée ou à relais de puissance à fluide, c. à d. au moyen d'un fluide sous pression produisant toute la force nécessaire, ou la plus grande partie de celle-ci, pour commander la direction du véhicule
• B62D 6/00 - Dispositions pour la commande automatique de la direction en fonction des conditions de conduite, qui sont détectées et pour lesquelles une réaction est appliquée, p.ex. circuits de commande
• B60T 7/06 - Disposition de la pédale
• B62D 101/00 - Vitesse du véhicule

Abrégé

A circumferential helical water groove cooling apparatus used for enhancing the heat transfer of a gearbox, comprising a cylindrical outer casing (1). A water inlet (11) and a water outlet (12) are provided on the surface of the outer casing (1), and an inner casing (2) of the gearbox is arranged inside the outer casing (1). The outer surface of the inner casing (2) of the gearbox is fitted with the inner surface of the outer casing (1), and the outer surface of the inner casing (2) of the gearbox is provided with helical fins (24) along the extending direction of the inner casing (2) of the gearbox. The space between adjacent fins (24) is a water groove (21), and the water groove (21) communicates with the water inlet (11) and the water outlet (12). A turbulent flow structure (22) is arranged in the water groove (21) on the side close to the water outlet (12). The cooling apparatus may greatly increase the heat exchange area by means of providing a circumferential helical water groove. In addition, the turbulent flow structure arranged in the water groove may destroy a heat transfer boundary layer, and effectively strengthen a turbulent flow in a channel, so that the cooling water temperature is also distributed evenly, and a convective heat transfer coefficient is greatly improved.

Classes IPC  ?

• F16H 57/04 - Caractéristiques relatives à la lubrification ou au refroidissement

Abrégé

An electrolytic machining method using dynamic deformation of a flexible electrode. Tubular or rod-like metal is used as a tool electrode (2) for electrolytic machining; the tool electrode (2) has a certain rigidity, but can be bent and deformed when a corresponding load is applied; when a complex profile is machined, a side wall of the tool electrode (2) serves as a machining surface to perform scanning-type electrolytic machining along a surface of the complex profile of a workpiece (3); and during a machining process, different loads are applied according to the curvature change characteristics of the profile of the workpiece, such that the tool electrode is dynamically deformed while being fed, and a deformed shape is similar to a mathematical model of a profile line of the workpiece, such that the machined profile of the workpiece approximates an ideal profile. By means of the electrolytic machining method using dynamic deformation of a flexible electrode, a complex profile can be machined by means of a simple-shaped electrode, thereby improving the electrolytic machining efficiency, and ensuring the machining precision. Further provided is an application of the electrolytic machining method using dynamic deformation of a flexible electrode.

Classes IPC  ?

• B23H 3/04 - Electrodes spécialement adaptées à cet effet ou leur fabrication
• B23H 9/10 - Usinage d'aubes de turbine ou de buses
• C25F 7/00 - PROCÉDÉS POUR LE TRAITEMENT D'OBJETS PAR ENLÈVEMENT ÉLECTROLYTIQUE DE MATIÈRE; APPAREILLAGES À CET EFFET Éléments de construction des cellules, ou leur assemblage, pour l'enlèvement électrolytique de matières d'objets; Entretien ou conduite

Abrégé

Disclosed is an interlayer pre-cooling apparatus for sand mold freezing printing, comprising a sand-laying apparatus, wherein the sand-laying apparatus is located above a negative pressure low-temperature forming chamber, and the sand-laying apparatus comprises several independent sand-laying grooves, hollow sand-laying rollers, cooling chambers, sand-scraping plates and openable and closable baffles. An openable and closable baffle is rotatably arranged at each sand-laying groove discharge port for use in laying low-temperature premixed sand on demand. The hollow sand-laying rollers and the sand-scraping plates provide cooling to further cool premixed molding sand during the levelling and compaction of low-temperature molding sand. By using the present apparatus for 3D sand mold freezing printing, the low temperature of the premixed molding sand is precisely controllable, which is of great significance for achieving the interlayer pre-cooling of sand mold freezing printing.

Classes IPC  ?

• B22C 9/02 - Moules en sable ou moules analogues pour pièces coulées
• B22C 1/18 - Compositions des matériaux réfractaires pour moules ou noyaux; Leur structure granulaire; Caractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules caractérisées par l'emploi des agents liants; Mélange d'agents liants d'agents inorganiques
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
• B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
• B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive

Abrégé

A low temperature air flow servo auxiliary sand removal apparatus for frozen sand mold cutting, which comprises a hollow cutting tool (3), a main shaft (5) mounted on the hollow cutting tool (3), an air tube (9), and a refrigeration apparatus (11) connected to one end of the air tube (9); the refrigeration apparatus (11) is connected and fixed to an air pump (13) by means of a valve (12); an inner cavity of the hollow cutting tool (3) is provided with a cutting tool through hole (2) along an axis; an inner cavity of the main shaft (5) is provided with a main shaft through hole (6) along an axis; a bearing seat hole used for the placement of a bearing (7) is formed at an upper end of the main shaft (5), an outer race of the bearing (7) matches with the bearing seat hole, and an air tube connector (8) is installed at an inner race; the air tube connector (8) is connected and fixed to the air tube (9); and a surface of the hollow cutting tool (3) is provided with an air spray hole (1) in communication with the cutting tool through hole (2). Further provided is a low temperature air flow servo auxiliary sand removal method for frozen sand mold cutting. The present apparatus is used for waste sand cleanup during frozen sand mold cutting and forming, it can be ensured that a machined surface of a frozen sand mold is free of residual waste sand buildup and adhesion, an influence of sand shavings on the cutting tool and the sand mold is reduced, the surface precision of the sand mold is improved, and the service life of the cutting tool is prolonged.

Classes IPC  ?

• B22C 9/02 - Moules en sable ou moules analogues pour pièces coulées
• B22C 9/12 - Traitement des moules ou noyaux, p.ex. séchage, étuvage
• B23B 27/10 - Outils de coupe avec une disposition particulière pour le refroidissement
• B23Q 11/10 - Dispositions pour le refroidissement ou la lubrification des outils ou des pièces travaillées

Abrégé

An analysis method for dynamic characteristics of a multi-stage planetary gear structure. The analysis method comprises the following steps: respectively establishing nonlinear dynamics models of single-stage spur gear transmission systems according to a lumped-mass method; analyzing a relative displacement relationship and a motion transmission relationship between two adjacent components, and establishing a dynamics equation of a three-stage planetary gear transmission system on the basis of a Lagrange equation; establishing a nonlinear dynamics equation of the three-stage planetary gear transmission system on the basis of time-varying meshing stiffness, a dynamic transmission error and a meshing phase; and analyzing the dynamic characteristics of the three-stage planetary gear transmission system on the basis of a Runger-Kutta method. In the analysis method, nonlinear influence factors, such as time-varying meshing stiffness and a dynamic transmission error, are comprehensively taken into consideration, and a lumped-mass method, a Lagrange equation and a Runger-Kutta method are combined and applied to solving the dynamic characteristics of a three-stage planetary gear transmission system, thereby improving the solving accuracy and efficiency of a multi-stage planetary gear transmission system, and providing great significance to the improvement of the meshing stability and bearing capacity of the gear transmission system and reduction of friction loss.

Classes IPC  ?

• G06F 30/17 - Conception mécanique paramétrique ou variationnelle
• G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu
• G06F 17/12 - Opérations mathématiques complexes pour la résolution d'équations d'équations simultanées
• G06F 119/14 - Analyse des forces ou optimisation des forces, p.ex. forces statiques ou dynamiques

Abrégé

Disclosed in the present invention is a consequent-pole-type permanent magnet auxiliary synchronous reluctance electric motor operating in a wide area, the electric motor comprising a stator and a consequent-pole-type synchronous reluctance rotor. The stator comprises a stator iron core and an armature winding, wherein the number of pole pairs of the armature winding is equal to the number of pole pairs of the consequent-pole-type synchronous reluctance rotor. The consequent-pole-type synchronous reluctance rotor comprises a rotor iron core, and reluctance poles and permanent magnet poles, which are distributed on the rotor iron core in a circumferential direction, wherein the number of pairs of the reluctance poles is greater than or equal to the number of pairs of the permanent magnet poles; and a direct-axis magnetic circuit of the reluctance pole is closed by means of the iron core, and the reluctance of the direct-axis magnetic circuit of the reluctance pole is smaller than the reluctance of a quadrature-axis magnetic circuit of the reluctance pole, so that a reverse salient pole characteristic can be obtained. The present invention has the reverse salient pole characteristic, and a positive id is used to utilize reluctance torque, so that irreversible demagnetization of a permanent magnet can be avoided. In addition, the direct-axis magnetic circuit of the reluctance pole is closed by means of the iron core, so that a larger direct-axis inductance can be obtained, and the flux-weakening speed expansion capability is stronger. In a full-speed operation range, a current angle adjustment range of the present invention is wide, so that a constant-power speed adjustment range can be enlarged.

Classes IPC  ?

• H02K 1/27 - Noyaux rotoriques à aimants permanents
• H02K 1/24 - Noyaux rotoriques à pôles saillants

Abrégé

A ventilation structure of a core chamber of a turbofan engine having a large bypass ratio, said structure comprising: an outer bypass wall surface (1), a core chamber wall surface (4) and a core casing (7). An outer bypass flow channel (2) is formed between the outer bypass wall surface (1) and the core chamber wall surface (4). A core chamber (6) is formed between the core chamber wall surface (4) and the core casing (7). An air intake annular cavity (3) is provided in the core casing and is located at the upstream position. The air intake annular cavity (3) is used to put the outer bypass flow channel (2) and the core chamber (6) in communication. An exhaust grille (5) is further provided on the core chamber wall surface (4) and is located at a tail position. The exhaust grille (5) is used to discharge cooling gas in the core chamber (6) into the outer bypass flow channel (2). The described structure better achieves the purpose of cooling the surface of the core casing and obtains an improved in-cabin flow heat exchange effect. A ventilation method is also provided.

Classes IPC  ?

• F02C 7/18 - Refroidissement des ensembles fonctionnels caractérisé par l'agent refroidisseur l'agent refroidisseur étant gazeux, p.ex. l'air

Abrégé

The present invention provides an energy-efficient channel state information (CSI) transmission method in an NR-vehicle to everything (V2X) network, mainly used for V2X. Considering sidelink (SL) resource allocation of NR-V2X in a mode 1, a 5G base station schedules SL resources used by a V2X user according to CSI regularly reported. In order to reduce overhead, an energy efficiency maximized power allocation solution using a hybrid spectrum access technique is provided to transmit CSI. By means of known CSI, an SL resource allocation problem is modeled, aiming to maximize total throughput of the NR-V2X network according to total available power and a minimum transmission rate. Power allocation is first averaged to quickly obtain appropriate subcarriers, and then an alternative optimization mechanism is provided to perform power allocation. Simulation shows that the provided CSI transmission power allocation solution can significantly reduce energy consumption, and a provided suboptimal SL resource allocation algorithm achieves, with low complexity, better performance than an average power allocation algorithm.

Classes IPC  ?

• H04W 16/10 - Répartition dynamique des ressources
• H04W 52/24 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué selon des paramètres spécifiques utilisant le rapport signal sur parasite [SIR Signal to Interference Ratio] ou d'autres paramètres de trajet sans fil

Abrégé

A method for predicting material demands in an assembly workshop, which belongs to the field of intelligent manufacturing: when a triggering condition for predicting an auxiliary material demand is met, first determining whether the condition is periodically triggered or may be triggered by a use amount, and setting a triggering station; then, determining a corresponding critical reference part of the triggering station and the station where the critical reference part is currently located; finally, re-determining the number of auxiliary material distribution tasks that need to be generated for the triggering station and an optimal delivery time period; and when a triggering condition for predicting a critical and important part demand is met, according to a critical and important part demand prediction method and a station completion time usage prediction algorithm, determining and updating an optimal delivery time period of a critical and important part delivery task of a subsequent station. In the method, worker information, reference part grades, auxiliary material grades, and critical and important part grades are comprehensively considered; a completion time usage prediction model is established; a material demand prediction method is proposed separately for auxiliary materials and critical and important parts; a predicted material handling task and an optimal delivery time period are provided for a material handling system; and a scheduling buffer time is provided for the material handling system.

Classes IPC  ?

• G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
• G06Q 10/06 - Ressources, gestion de tâches, des ressources humaines ou de projets; Planification d’entreprise ou d’organisation; Modélisation d’entreprise ou d’organisation
• G06Q 50/04 - Fabrication
• G06N 3/04 - Architecture, p.ex. topologie d'interconnexion
• G06N 3/00 - Agencements informatiques fondés sur des modèles biologiques

Abrégé

A multifunctional electric circulating ball steering system for a commercial vehicle. The system comprises: an electric power assistance module, a mechanical transmission module, and a control module. The electric power assistance module comprises: a dual-rotor electric motor module (14) and an assistance electric motor (22). The mechanical transmission module comprises: a steering wheel (1), a steering shaft (4), a shaft coupling (5), a circulating ball steering gear (16), a sector gear (19), a sector gear shaft (6), a steering drag link (7), a steering tie rod (12), a steering knuckle arm (8), a left trapezoidal arm (11), a right trapezoidal arm (26), a left steering knuckle (10), a right steering knuckle (25), a left wheel (9), and a right wheel (24). The control module comprises: an electronic control unit (21), a torque sensor (3), a vehicle speed sensor (20), an angle sensor (2) and a current sensor (23). Further disclosed is a control method for the multifunctional electric circulating ball steering system for the commercial vehicle. The multifunctional electric circulating ball steering system for the commercial vehicle fully uses high reduction ratio capability of the circulating ball steering gear (16), maximizes a system assistance torque, achieves an electric power assistance function, simplifies the system, and ensures the reliability of the system while providing a wire control function.

Classes IPC  ?

• B62D 3/08 - Boîtiers de direction mécaniques du type à vis sans fin à vis et écrou utilisant des billes intermédiaires ou des éléments analogues
• B62D 5/04 - Direction assistée ou à relais de puissance électrique, p.ex. au moyen d'un servomoteur relié au boîtier de direction ou faisant partie de celui-ci

Abrégé

The present invention provides a cognitive learning method based on a brain mechanism. By means of the present invention, the most suitable algorithm type and parameters are selected according to an environment and a task, such that a good learning effect can be obtained in various different environments and tasks, and an erroneous behavior can be corrected. A framework internally comprises four main modules, namely, a cognitive feature extraction module, a cognitive control module, a learning network module and a memory module, wherein the memory module internally includes a database, a cognitive case library and an algorithm and hyper-parameter library, which respectively store dynamic environment and task data, a cognitive case, and a specific algorithm and hyper-parameter value. For a dynamic environment and a dynamic task, the most suitable algorithm type and hyper-parameter combination can be flexibly selected. Moreover, erroneous flag data is corrected by correct flag data by means of the principle of "good money drives out bad money", such that the robustness of training data is realized.

Classes IPC  ?

• G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques

Abrégé

A multi-functional electric recirculating ball steering system for a commercial vehicle, and a control method therefor. The system comprises: an electric power assisting module, a mechanical transmission module, and a control module. The electric power assisting module comprises: a dual-rotor motor module (14) and an assist motor (22).The mechanical transmission module comprises: a steering wheel (1), a steering shaft (4), a shaft coupling (5), a recirculating ball steering gear (16), a sector gear (19), a sector gear shaft (6), a steering drag link (7), a steering tie rod (12), a steering knuckle arm (8), a left trapezoidal arm (11), a right trapezoidal arm (26), a left steering knuckle (10), a right steering knuckle (25), a left wheel (9), and a right wheel (24). The control module comprises: an electronic control unit (21), a torque sensor (3), a vehicle speed sensor (20), an angle sensor (2), and a current sensor (23). By means of the present system, the high reduction ratio capability of the recirculating ball steering gear (16) is fully utilized, the system assist torque is maximized, the electric power assistance function is achieved, the system is simplified, and the reliability of the system while providing a wire control function is ensured.

Classes IPC  ?

• B62D 3/08 - Boîtiers de direction mécaniques du type à vis sans fin à vis et écrou utilisant des billes intermédiaires ou des éléments analogues
• B62D 5/04 - Direction assistée ou à relais de puissance électrique, p.ex. au moyen d'un servomoteur relié au boîtier de direction ou faisant partie de celui-ci

Abrégé

The present invention belongs to the technical field of special materials. Disclosed is a laser activation-based copper plating process for a 3D-printed ceramic surface. In the present invention, a special-shaped alumina substrate is prepared by means of the advantages of additive manufacturing, and then the surface of a ceramic substrate is "activated" by means of a laser pretreatment. Finally, combined with an electroless copper plating process, the directional controllable metallization of the surface of the ceramic substrate of a three-dimensional shape is achieved at room temperature, and a high-precision densely packed copper layer which has good reproducibility is obtained. The obtained coating has satisfactory roughness, excellent bonding force and stability, and good solderability. The resistivity of the copper layer measured by a four-probe resistance meter is about 3.1 mΩ•cm, and the limit line width of a metal circuit is about 33.2 μm. The process may be widely used in electronic and radio frequency circuit industries, such as high-power light-emitting diodes (LEDs), integrated circuits, filters, etc.

Classes IPC  ?

• C04B 35/10 - Produits céramiques mis en forme, caractérisés par leur composition; Compositions céramiques; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde d'aluminium
• C04B 35/622 - Procédés de mise en forme; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques
• C04B 35/638 - Leur élimination
• C04B 41/88 - Métaux
• B33Y 10/00 - Procédés de fabrication additive
• B33Y 70/10 - Composites de différents types de matériaux, p.ex. mélanges de céramiques et de polymères ou mélanges de métaux et de biomatériaux

Abrégé

A DLP and FDM-based composite multi-material additive manufacturing apparatus, comprising a DLP optical engine mask exposal portion at an upper layer, an FDM two-dimensional movement switchable print head system at a middle layer, and a lifting/lowering movement printing platform system at a lower layer, the three layers being connected by means of mechanical parts to form an upper-middle-lower stepped configuration. A method for carrying out composite multi-material additive manufacturing by using the apparatus. After a photosensitive resin is subjected to exposal machining prototyping by means of a DLP optical engine, a machining plane is subjected to precise positioning before machining method switching, the remaining machining is carried out by using an FDM head according to design or structural requirements, and meanwhile, a head switching device can be used to implement replacement and machining processes of different materials to achieve material switching; operating repeatedly in this way can achieve multi-material gradient additive manufacturing. In the apparatus and the method, DLP light curing and FDM fused deposition modeling technologies are combined to achieve multi-material composite additive machining; by using simple machining method switching, device space is effectively saved, actions between working procedures are coherent, the prototyping time is saved, and the cost is reduced.

Classes IPC  ?

• B29C 64/118 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant un matériau filamentaire mis en fusion, p.ex. modélisation par dépôt de fil en fusion [FDM]
• B29C 64/171 - Procédés de fabrication additive spécialement adaptés à la fabrication d'objets multiples en 3D
• B29C 64/20 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet
• B29C 64/227 - Moyens d’entraînement
• B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
• B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
• B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive

Abrégé

A hypersonic large internal contraction ratio air inlet channel which has a stepless adjustable air release valve, comprising an air inlet channel front body (1), an air-discharging slit cover plate (2) extending backwards from the air inlet channel front body (1), a lip cover (4) located on the air-discharging slit cover plate (2), and sidewalls (3) located on two sides of the lip cover (4). The air inlet channel front body (1), the air-discharging slit cover plate (2), the lip cover (4) and the sidewalls (3) at two sides together form an inner flow channel of an air inlet channel. A plurality of air-discharging cavities (12) arranged from front to back are provided in the air-discharging slit cover plate (2). A plurality of air-discharging slits (16) which connect the air-discharging cavities (12) with the inner flow channel are provided in the air-discharging slit cover plate (2). The lower half of each air-discharging cavity (12) has an air-discharging channel (13) which laterally penetrates the sidewalls (3). An opening adjustment apparatus is also provided. The opening adjustment apparatus comprises a driver (10), a rotating shaft (8) extending from the driver (10), and valve plates (6) located in each air-discharging channel (13). The valve plates (6) are mounted on the rotating shaft (8) and are rotated by means of the rotating shaft (8). The valve plates (6) rotate between open and closed positions. When the valve plates (6) rotate to the open position, the air-discharging cavities (12) communicate with the outside. When the valve plates (6) rotate to the closed position, the air-discharging cavities (12) are closed by the valve plates (6).

Classes IPC  ?

• F02C 7/057 - Commande ou régulation
• F02K 7/10 - Ensembles fonctionnels dans lesquels le fluide de travail est utilisé uniquement sous forme de jet, c. à d. ensembles ne comportant ni turbine ni autre moteur entraînant un compresseur ou une soufflante carénée; Leur commande caractérisés par une compression dans un diffuseur, c. à d. tubulures aéro-thermodynamiques ou statoréacteurs

Abrégé

A cross-medium unmanned aerial vehicle device and a control method therefor. The cross-medium unmanned aerial vehicle device comprises a housing (4) and a piston which is provided in the housing (4) and can reciprocatively move in the housing (4), one end of the housing is open, a plurality of flying wings are uniformly arranged in the circumferential direction of the piston, and the flying wings are rotatably connected to the side of the piston facing the opening and are unfolded or folded in an umbrella shape; and under the pushing of the piston, the flying wings can be unfolded towards the outside of the housing and can be folded back into the housing. The piston capable of moving is provided in the housing, the flying wings are rotatably connected to the piston, the flying wings can be unfolded towards the outside of the housing under the pushing action of the piston and can be folded in the housing, and therefore, conversion of different forms in water and air can be completed; when the device enters and moves out of water, the flying wings are folded in the housing and protected by the housing to be prevented from being damaged; and during flying, the flying wings can be smoothly unfolded to guarantee the flying state.

Classes IPC  ?

• B64C 35/00 - Hydravions à coque; Hydravions à flotteurs

Abrégé

An intelligent brake-by-wire system based on a digital twin and a prediction control method thereof. The intelligent brake-by-wire system based on the digital twin comprises an intelligent brake-by-wire system, a digital twin cloud storage computing platform, and a terminal interaction system; the intelligent brake-by-wire system comprises a real-time brake response acquisition module, a control parameter driving module, and a brake-by-wire module; the digital twin cloud storage computing platform comprises a digital twin virtual model module, a virtual braking computing module, a life cycle calculation module, a working limit calculation module, a control parameter database, and a data processing module; and the terminal interaction system receives information data sent by the digital twin cloud storage computing platform, and feeds back the information data to a user after visualization processing. According to the system, the residual health state, the limit working range and the like of the intelligent brake-by-wire system are calculated and fed back by means of a virtual system, and the working reliability and security of the whole life cycle of the brake system are improved.

Classes IPC  ?

• G05D 1/02 - Commande de la position ou du cap par référence à un système à deux dimensions
• B60T 13/12 - Transmission de l'action de freinage entre l'organe d'attaque et les organes terminaux d'action, avec puissance de freinage assistée ou relais de puissance; Systèmes de freins incorporant ces moyens de transmission, p.ex. systèmes de freinage à pression d'air avec assistance, entraînement ou relâchement par fluide le fluide étant un liquide
• B60T 13/70 - Commande électrique des systèmes de freins à fluide sous pression par interrupteurs commandés par un fluide

Abrégé

The present invention relates to the technical field of wireless communications, and provides a three-dimensional spectrum situation completion method and apparatus based on a generative adversarial network. The method comprises: performing graying and coloring preprocessing on the basis of a defect three-dimensional spectrum situation obtained by sampling a target area by an unmanned aerial vehicle, and obtaining a colorfully represented three channels of defect three-dimensional spectrum situation map and forming a training set by using the defect three-dimensional spectrum situation map; training a generative adversarial network on the basis of the training set to obtain a generator network trained in the generative adversarial network; performing graying and coloring preprocessing on the basis of a measured defect three-dimensional spectrum situation obtained by sampling a measured designated area by the unmanned aerial vehicle, obtaining a colorfully represented three channels of measured defect three-dimensional spectrum situation map, using the measured defect three-dimensional spectrum situation map as input data of the generator network, and obtaining, by means of the generator network, a colorfully represented three channels of measured completion three-dimensional spectrum situation map. The present invention can be used for spectral situation completion.

Classes IPC  ?

• H04B 17/382 - Surveillance; Tests de canaux de propagation pour l’attribution de ressources, le contrôle d’accès ou le transfert
• G06N 3/08 - Méthodes d'apprentissage
• G06N 3/04 - Architecture, p.ex. topologie d'interconnexion

Abrégé

A preparation process for a controllable network ceramic/metal composite material, the method comprising: taking oxide ceramic powder as a raw material, mixing same with a photosensitive resin to prepare a slurry, molding the slurry into a three-dimensional network ceramic green body by using photocuring 3D printing technology, ultrasonically cleaning the green body and then degreasing and sintering same at a high temperature to obtain a compact ceramic framework, then placing the ceramic framework and a metal together into a graphite crucible and placing same into a vacuum pressure infiltration apparatus for forming, and finally, pumping argon into the apparatus for cooling to prepare the ceramic/metal composite material. The preparation process can achieve a compact combination of the ceramic/metal composite material on a three-dimensional scale, and by means of an optimized design of the overall appearance, lattice shape and pore size of the ceramic framework, the problems of only one material being able to be formed in conventional 3D printing manufacturing, and a formed part having a single function and a limited performance are solved, and the composite material has good mechanical properties under different application backgrounds.

Classes IPC  ?

• B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
• C04B 35/622 - Procédés de mise en forme; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques
• C22C 1/08 - Alliages poreux avec pores ouverts ou fermés
• B22F 3/26 - Imprégnation

Abrégé

A chassis-by-wire cyber physical system in an intelligent traffic environment, and a control method. The system comprises: an SoS-level CPS, system-level CPSs and unit-level CPSs; data transmission is achieved between a plurality of unit-level CPSs and one system-level CPS, and data transmission is achieved between a plurality of system-level CPSs and one SOS-level CPS; and the system integrates hub motors and a suspension, and cancels conventional structures such as an engine and a clutch, thereby simplifying the structure of a chassis. The motor directly drives a vehicle to operate, and different driving, braking or torque is applied to different wheels by means of four hub motors, so as to satisfy independent control of the wheels, thereby improving active safety and operation stability.

Classes IPC  ?

• B60W 40/00 - Calcul ou estimation des paramètres de fonctionnement pour les systèmes d'aide à la conduite de véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier
• B60W 40/10 - Calcul ou estimation des paramètres de fonctionnement pour les systèmes d'aide à la conduite de véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier liés au mouvement du véhicule
• B60W 10/08 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion comprenant la commande des unités de traction électrique, p.ex. des moteurs ou des générateurs
• B60W 10/18 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des systèmes de freinage
• B60W 10/20 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des systèmes de direction
• B60W 50/00 - COMMANDE CONJUGUÉE DE PLUSIEURS SOUS-ENSEMBLES D'UN VÉHICULE, DE FONCTION OU DE TYPE DIFFÉRENTS; SYSTÈMES DE COMMANDE SPÉCIALEMENT ADAPTÉS AUX VÉHICULES HYBRIDES; SYSTÈMES D'AIDE À LA CONDUITE DE VÉHICULES ROUTIERS, NON LIÉS À LA COMMANDE D'UN SOUS-ENSEMBLE PARTICULIER - Détails des systèmes d'aide à la conduite des véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier

Abrégé

A method for preparing a calcium silicate/magnesium oxide porous biological bone scaffold based on an in-situ method, relating to the technical field of biomedical materials. Mixed powder of a metal oxide and calcium silicate ceramic is prepared using an in-situ method, a ceramic scaffold is prepared using a DLP molding technology and a high-temperature degreasing and sintering method, then the surface of the ceramic scaffold is uniformly coated with a layer of metal-containing slurry, the surface of the scaffold is scanned using laser light, and finally a biological bone scaffold finished product is prepared after high-temperature sintering. By means of mixed powder prepared using an in situ method, magnesium hydroxide particles can uniformly adhere to the surfaces of ceramic particles, so that a printed blank has numerous microporous structures after sintering; moreover, a metal slurry coating on the surface of a ceramic scaffold can yield the effects of strengthening the structure and reducing the degradation rate, and metal ions on the surface can yield an antibacterial effect. Therefore, the scaffold can be applied to the field of bone tissue engineering, and can be used as a bone filler, a replacement or an in vitro cell culture scaffold.

Classes IPC  ?

• C04B 35/22 - Produits céramiques mis en forme, caractérisés par leur composition; Compositions céramiques; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de silicates autres que l'argile riches en oxyde de calcium

Abrégé

Disclosed are a rotor magnetic pole modulation-type induction hybrid excitation brushless motor and a power generation system. Said motor comprises a stator, a magnetic pole modulation-type rotor, an armature winding, an induction excitation winding, a main excitation winding, an induction armature winding and a rotary rectifier. Both the armature winding and the induction excitation winding are provided in the stator. The main excitation winding and the induction armature winding are both provided in the magnetic pole modulation-type rotor. The main excitation winding is connected to the induction armature winding by means of the rotary rectifier. The magnetic pole modulation-type rotor comprises k repeated magnetic pole units in the circumferential direction, wherein k is a positive integer. If the pole pair number of each magnetic pole unit is p0, the pole pair numbers of the magnetic pole modulation-type rotor are p=k×p0, p0m=n, and p0i=n+1, wherein n is a positive integer. According to the present invention, a magnetic pole modulation-type rotor is used, and a single main excitation coil can simultaneously adjust the magnetic fluxes of p0i iron core poles, thus the magnetic tuning efficiency is high. Meanwhile, brushless power supply of a main excitation winding on a rotor can be achieved, and the efficiency of induction can be improved. Furthermore, the self-excitation of a motor can be achieved without the need of an external power supply.

Classes IPC  ?

• H02K 1/22 - Parties tournantes du circuit magnétique
• H02K 1/27 - Noyaux rotoriques à aimants permanents
• H02K 1/12 - Parties fixes du circuit magnétique
• H02P 9/30 - Dispositions pour la commande de génératrices électriques de façon à obtenir les caractéristiques désirées à la sortie par variation du champ utilisant des tubes à décharge ou des dispositifs à semi-conducteurs utilisant des dispositifs à semi-conducteurs

Abrégé

A brake system having a variable pedal displacement - brake force characteristic, and a control method therefor. The system comprises a base, a first power-assisted adjustment apparatus, a second power-assisted adjustment apparatus, a pedal mechanism, a brake master cylinder, an oil tank, a pedal displacement sensor, a pressure sensor, a hydraulic control unit and an electronic control unit. In the system, a brake pedal feeling is freely designed for various brake working conditions. The system has an active brake function and can be integrated with active control techniques such as a regenerative energy recovery, an electronic stability program (ESP) and adaptive cruise control (ACC), thereby realizing intelligent control over a vehicle. Moreover, the redundancy in a failure backup mode is added, thereby improving the brake safety.

Classes IPC  ?

• B60T 7/04 - Organes d'attaque de la mise en action des freins par l'entremise d'une personne actionnés au pied
• B60T 13/74 - Transmission de l'action de freinage entre l'organe d'attaque et les organes terminaux d'action, avec puissance de freinage assistée ou relais de puissance; Systèmes de freins incorporant ces moyens de transmission, p.ex. systèmes de freinage à pression d'air avec entraînement ou assistance électrique
• B60T 17/22 - Dispositifs pour surveiller ou vérifier les systèmes de freins; Dispositifs de signalisation

Abrégé

A creep load equivalent acceleration method based on failure mode consistency, the method comprising the following steps: respectively performing a material high-temperature tensile test, a material high-temperature creep test and a material variable-temperature and variable-load creep test; establishing a fracture time rule, a minimum creep rate rule and a fracture strain rule; performing calculation to obtain the value of a parameter p in a multi-stage variable-temperature and variable-load creep nonlinear damage accumulation model; dividing failure mode consistency intervals of variable-temperature and variable-load creep loads; and respectively calculating the damage caused by the creep loads in the failure mode consistency intervals by using the multi-stage variable-temperature and variable-load creep nonlinear damage accumulation model, and accelerating the caused damage to the maximum creep load state in the failure mode consistency intervals according to the principle of damage equivalence, so as to finally realize the equivalent acceleration of the creep loads. By means of the method, creep loads with the same failure mode can be converted into a greater creep load state according to the principle of damage equivalence, such that a creep test time is greatly shortened while guaranteeing failure mode consistency.

Classes IPC  ?

• G01N 3/18 - Exécution de tests à des températures élevées ou basses

Abrégé

A method for compiling a variable-temperature variable-load creep equivalent acceleration spectrum, comprising the following steps: performing a material high-temperature tensile test, a material high-temperature creep test, and a two-stage variable-temperature variable-load creep test, and on the basis of a two-stage variable-temperature variable-load creep damage accumulation model, calculating the values of parameters p in the creep damage accumulation model; and according to a multi-stage variable-temperature variable-load creep load nonlinear damage accumulation model, using the values of the parameters p to calculate a damage D caused by a multi-stage variable-temperature variable-load creep load spectrum, on the basis of the principle of consistency of the damage D, converting the multi-stage variable-temperature variable-load creep load spectrum into an equivalent acceleration spectrum of a primary-stage maximum creep load, and finally performing compiling to obtain a variable-temperature variable-load creep equivalent acceleration spectrum. Said method can convert a large amount of small creep loads into a large creep load state according to the principle of damage equivalence, greatly saving the time of a creep test.

Classes IPC  ?

• G01N 3/18 - Exécution de tests à des températures élevées ou basses

Abrégé

The present invention discloses a network- and link-level joint intelligent dynamic spectrum anti-interference system and method. The system comprises a link-level anti-interference subsystem and a network-level anti-interference subsystem; the link-level anti-interference subsystem sets a return value as system transmission throughput in a single decision-making period, and a user performs intelligent frequency use decision making according to the obtained return value to avoid a frequency band in which interference is located; and the network-level anti-interference subsystem is used for performing reasonable frequency band distribution management on lower-layer sub-users when the link-level anti-interference is invalid, such that the frequency domain anti-interference capability of the whole system is further improved. In the present invention, the user performs intelligent frequency use decision making by means of a reinforcement learning-based dynamic spectrum anti-interference algorithm, such that external malicious interference is effectively avoided, dynamic spectrum access is realized, and the frequency domain anti-interference capability of the system is improved.

Classes IPC  ?

• H04W 28/18 - Négociation des paramètres de télécommunication sans fil
• H04W 72/12 - Planification du trafic sans fil
• H04W 16/10 - Répartition dynamique des ressources
• H04B 17/382 - Surveillance; Tests de canaux de propagation pour l’attribution de ressources, le contrôle d’accès ou le transfert

Abrégé

A networked collaborative manufacturing platform for professional users and manufacturers, belonging to the field of networked collaborative manufacturing. The networked collaborative manufacturing platform comprises: a professional user layer which is configured to provide services for professional users and comprises a product detail development module, a demand release module and a price determination module; a platform layer which is configured to perform collaborative production on distributed production resources and comprises a demand analysis module, a resource state analysis module, a cloud production line simulation module and an intelligent quotation module; and a manufacturer layer which is configured to provide services for manufacturers and comprises a resource state upload module, a resource scheduling module and a price agreement module. The networked collaborative manufacturing platform can provide manufacturers with real-time device state access interfaces for a platform side to use, and can provide professional users with processing and manufacturing services of complete cloud production according to the professional users' own demands.

Classes IPC  ?

• G06Q 50/04 - Fabrication

Abrégé

Disclosed in the present invention is a method for implementing fault diagnosis by means of a spread spectrum carrier, comprising the following steps: designing incident signal parameters, selecting a spread spectrum sequence used for fault detection, determining a centre frequency and a sequence length of the spread spectrum code, and segmenting and transforming a power carrier source signal; using the fault detection spread spectrum sequence as a carrier spread spectrum code, performing spread spectrum modulation on the transformed power carrier source signal to generate an SSPLCR sequence; coupling the SSPLCR sequence to a cable to be tested and, when the cable works normally and no fault occurs, transmitting the SSPLCR signal via the cable to a receiving end; when the cable is faulty, reflecting the SSPLCR signal back to the sending terminal; synchronising, despreading and demodulating the SSPLCR signal at the receiving end to restore power carrier information carried by the SSPLCR signal; and extracting the SSPLCR fault reflection signal at the sending end, and obtaining the type and position of the cable fault by means of a related operation. The present method achieves the integration of power transmission, data transmission, and fault diagnosis, and improves the reliability and maintainability of the power delivery and communication system.

Classes IPC  ?

• H04B 1/69 - Techniques d'étalement de spectre
• H04B 1/7087 - Aspects de la synchronisation de la porteuse
• H04B 1/7093 - Structure du corrélateur du type à filtre adapté
• H04B 3/06 - Systèmes à ligne de transmission - Détails Égalisation par le signal transmis
• H04B 3/46 - Surveillance; Tests
• H04B 3/54 - Systèmes de transmission par lignes de réseau de distribution d'énergie

Abrégé

An internal-external flow decoupled dual-waverider high-speed airbreathing aircraft, comprising an aircraft body. A Bump forebody is provided on the upper surface of the aircraft body, a high-capacity waverider is provided on the lower surface thereof, and an air inlet passage, a combustion chamber and a nozzle are provided inside the aircraft body, the air inlet passage being a high-external-compression-ratio internal-waverider air inlet passage. In the internal-external flow decoupled dual-waverider high-speed airbreathing aircraft provided in the described technical solution, the air inlet passage and the waverider are respectively arranged at upper and lower sides of the aircraft body, and the pneumatic decoupling of a waverider flow field and an inlet flow field of the air inlet passage is achieved by means of the decoupling in a geometric layout, avoiding the problems of low design efficiency and large external resistance of a non-design point caused by strong coupling of internal and external flows, significantly increasing the pneumatic design efficiency of a high-speed airbreathing aerospace aircraft, and effectively solving the problems in the existing internal-external flow coupled aircraft of the difficulty in balancing the total counterweight/torque, the reduction of the thrust of the aircraft when the air inlet passage moves downwards, the limited flow direction arrangement range of the air inlet passage, and the limitation of the total length of the aircraft.

Classes IPC  ?

• B64C 30/00 - Avions supersoniques

Abrégé

Provided are a self-resistive electric heating smart incremental forming method and system, the forming method comprising: step A: according to a spatial geometric variation of a region of contact between a forming tool and a sheet material in incremental forming, establishing a calculation model of the rate of change of volume of a deformed region; step B: according to the circuit features of the contact region in incremental forming with self-resistance electric heating, establishing a calculation model of the resistance and contact resistance of the material in such region; step C: establishing a calculation model of the instantaneous Joule heating between the forming tool and the contact region of the sheet material and the equivalent contact heat transfer coefficient; step D: substituting the described relevant parameters into a user subroutine ABAQUS-VUINTER to obtain a local deformation temperature value.

Classes IPC  ?

• B21D 31/00 - Autres procédés de travail des tôles, tubes ou profilés métalliques
• B21D 37/16 - Chauffage ou refroidissement
• G06F 30/17 - Conception mécanique paramétrique ou variationnelle
• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
• G06F 111/10 - Modélisation numérique
• G06F 113/22 - Moulage
• G06F 119/08 - Analyse thermique ou optimisation thermique
• G06F 119/14 - Analyse des forces ou optimisation des forces, p.ex. forces statiques ou dynamiques

Abrégé

A smart spring-based tunable dynamic vibration absorber and a control method. The tunable dynamic vibration absorber comprises a smart spring (2) connected to a main system (1). The smart spring (2) comprises a main supporting spring (201), an auxiliary supporting spring (202), a piezoelectric ceramic actuator (203), and a pair of controllable friction disks (205, 206). On the basis of a traditional tunable dynamic vibration absorber, the smart spring is used to replace a magnetorheological elastomer, and the smart spring-based tunable dynamic vibration absorber is designed. The dynamic vibration absorber can control the rigidity and damping change of the dynamic vibration absorber by means of an applied voltage, so that the inherent frequency of the dynamic vibration absorber can be adapt to the change of an external excitation frequency, thereby achieving a better vibration reduction effect.

Classes IPC  ?

• F16F 13/00 - Ensembles comportant des ressorts du type non à fluide ainsi que des amortisseurs de vibrations, des amortisseurs de chocs ou des ressorts à fluide

Abrégé

Disclosed are a multi-station switching system based on an under-mounted surface-exposure stereolithography technique, and a stereolithography processing method. The multi-station switching system comprises an upper forming layer, a middle multi-liquid-tank layer and a lower multi-station layer, wherein the forming layer is configured to rise and fall and switch to different stations by means of rotation; the multi-liquid-tank layer is configured to hold different types of liquid polymer materials; and the multi-station layer is configured to machine a formed part with different functions according to requirements. The present invention can achieve multi-material three-dimensional printing, and the optimization and modification of a formed part according to actual requirements. In addition, owing to the use of a rotary station structure, the system has a simple structure, space is effectively saved, the cost is reduced, the whole system is compact, and same has good application prospects in the fields of medical treatment and precision electronics.

Classes IPC  ?

• B29C 64/20 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet
• B29C 64/176 - Procédés de fabrication additive spécialement adaptés à la fabrication d'objets multiples en 3D successivement
• B29C 64/124 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet

Abrégé

A smart elastic bearing and a control method. The smart elastic bearing comprises smart polymer material layers (3), metal spacer layers (4) and two joints (1, 2). One of the joints is used for connecting a rotor blade, and the other joint is used for connecting a rotor hub. An external electric field or a magnetic field is applied to the smart polymer material layers. In the elastic bearing, a rubber material which is overlapped with a metal layer in a traditional elastic bearing is replaced with a smart polymer material so as to form a new-type elastic bearing in which metal layers and smart polymer material layers are overlapped with each other. Compared with a traditional elastic bearing using a rubber material, in the working process of a helicopter rotor system, the performance of the smart elastic bearing can be controlled to change by means of changing the physical parameters of the external electric field, the magnetic field, etc. so as to achieve active or semi-active vibration reduction of the helicopter rotor system.

Classes IPC  ?

• F16C 17/10 - Paliers à contact lisse pour mouvement de rotation exclusivement à la fois pour charges radiales et axiales
• F16C 33/04 - Coussinets; Bagues; Garnitures antifriction
• F16F 15/00 - Suppression des vibrations dans les systèmes; Moyens ou dispositions pour éviter ou réduire les forces de déséquilibre, p.ex. dues au mouvement
• B64C 27/32 - Rotors

Abrégé

A coaxial powder-feeding nozzle used for additive manufacturing on an inner wall and having a self-cleaning function, comprising a partition wall-type shell, a powder flow area, a cooling liquid flow area, and a shielding gas conveying channel. A powder self-cleaning filter (5) is provided on the outer side of the partition wall-type shell; the powder self-cleaning filter is arranged with a set of powder collecting tubes on each side of the partition wall-type shell in the axial direction; each set of powder collecting tubes comprises at least one powder collecting tube; under the coaction of a suction force applied by a powder collecting system and the self-weight of residual powder, a residual powder inlet of each powder collecting tube can cause the residual powder on the opposite side to roll down to the bottom along the wall surface of a metal tube to be processed on the same side, and to be gathered at the front end of the residual powder inlet of the powder collecting tube, such that the powder collecting tube can collect the residual powder at the front end of the powder collecting tube. Residual powder can be collected incidentally, without affecting gathering of powder flows; moreover, in a machining process, the inside of a tube is kept clean, and then the cladding quality is improved.

Classes IPC  ?

• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
• B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
• C23C 24/10 - Revêtement à partir de poudres inorganiques en utilisant la chaleur ou une pression et la chaleur avec formation d'une phase liquide intermédiaire dans la couche

Abrégé

Disclosed is a ceramic matrix composite turbine blade thermal analysis method taking a microscopic braided structure and a fiber bundle direction change into consideration. The method comprises the following steps: acquiring geometric characteristics of a ceramic matrix composite internal braided structure fiber bundle; establishing a microscopic model of warp yarns, weft yarns and a ceramic matrix composite substrate of a braided structure; constructing a braided structure ceramic matrix composite blade model with a blade height direction serving as a microstructure period width; according to a change in a blade profile, assigning a value to an anisotropic heat conductivity coefficient matrix which changes along with the change in the blade profile; performing mesh division; carrying out finite element calculation of a temperature field; and acquiring a temperature field calculation result of a braided structure ceramic matrix composite turbine blade model, performing comparative analysis on same and a calculation result based on an equivalent heat conductivity coefficient homogenization thermal analysis method, and extracting and analyzing fluctuation characteristics of a temperature field of a braided structure ceramic matrix composite turbine blade. The present invention can compensate for the defects of a homogenization thermal analysis method in terms of simulation distortion of temperature field fluctuation information.

Classes IPC  ?

• G06F 30/15 - Conception de véhicules, d’aéronefs ou d’embarcations
• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
• G06F 113/26 - Composites

Abrégé

A magnetic suspension local ventilator for mining, comprising a housing unit and a ventilation unit which is mounted in the housing. The ventilation unit comprises an inner housing, a protective sleeve (12), a magnetic bearing (2), an electromagnetic coil (22), a stator (13), a rotor (14), a rotating shaft (15), an impeller (17) and a limited-position rolling ball (21). The protective sleeve (12) is fixed in the housing. A coolant (16) passage is reserved between the protective sleeve (12) and the housing. The magnetic bearing (2) comprises an inner sleeve magnetic ring (11), an outer sleeve magnetic ring (10) and a bearing sleeve. The rotating shaft (15) has a non-contact rotatable connection to the protective sleeve (12) by means of the magnetic bearing (2) and the limited-position rolling ball (21). The inner sleeve magnetic ring (11) is suspended using the electromagnetic coil (22). The magnetic suspension local ventilator for mining can reduce abrasion and noise, improve the air volume and the ventilation stability of an excavation work surface, and meet the need of coal mines with special requirements such as explosion prevention.

Classes IPC  ?

• F04D 25/16 - Combinaisons de plusieurs pompes
• F04D 25/08 - Ensembles comprenant des pompes et leurs moyens d'entraînement le fluide énergétique étant l'air, p.ex. pour la ventilation
• F04D 29/058 - Paliers électromagnétiques
• F04D 29/58 - Refroidissement; Chauffage; Réduction du transfert de chaleur
• H02K 9/19 - Dispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p.ex. de l'huile
• H02K 5/16 - Moyens de support des paliers, p.ex. supports isolants ou moyens pour ajuster les paliers dans leurs flasques

Abrégé

An EC-RBELM algorithm-based prediction method for whole engine performance degradation, comprising: establishing EC-RBELM algorithm-based prediction model clusters of three performance parameters, i.e. a gas turbine rotation speed Ng, a power turbine inlet temperature T45, and specific fuel consumption SFC in different environments; performing off-line learning of EC-RBELM network topology parameters, and automatically updating the EC-RBELM network topology parameters according to prediction errors; and according to an EC-RBELM algorithm model, predicting performance parameter degradation of an individual turboshaft engine in different atmospheric environments. Said method solves the problems of poor generalization ability and low precision of a traditional data driving method when inlet atmospheric conditions of an engine changes in existing turboshaft engine parameter prediction. Prediction model clusters trained offline are invoked by means of inlet atmospheric conditions of an engine, and weighting is performed by means of MVW for combination prediction, and network topology parameters are automatically updated according to prediction errors, being suitable for individual differences during performance parameter prediction of different engines, and having a positive effect of promoting the health management of a turboshaft engine and reducing maintenance costs.

Classes IPC  ?

• G06F 30/17 - Conception mécanique paramétrique ou variationnelle
• G06F 30/27 - Optimisation, vérification ou simulation de l’objet conçu utilisant l’apprentissage automatique, p.ex. l’intelligence artificielle, les réseaux neuronaux, les machines à support de vecteur [MSV] ou l’apprentissage d’un modèle
• G06N 3/04 - Architecture, p.ex. topologie d'interconnexion
• G06N 3/08 - Méthodes d'apprentissage

Abrégé

Disclosed is a milling robot multi-modal frequency response prediction method based on small-sample transfer learning. The method comprises the following steps: selecting several points and a tool nose point on a body of a milling robot at any two postures, so as to perform a hammering test, and also performing a hammering test on several points on the body at a target posture, so as to obtain transfer source data and transfer target data; constructing three-order complex tensors of a robot frequency response characteristic transfer source domain and target domain, and performing multi-order modal parameter identification on a multi-modal frequency response of the tool nose point on the basis of a least-squares complex exponential method, so as to construct a label of data in the transfer source domain; on the basis of an input tensor and an output vector of the transfer source domain, generating a virtual sample by means of an information expansion function based on triangular membership and a multi-objective grey wolf optimization algorithm; respectively extracting data features from a frequency domain, a time domain and a time-frequency domain, and on this basis, performing feature augmentation on the complex tensors in the source domain and the target domain; performing dimensionality reduction on the complex tensors in the source domain and the target domain by means of a naive tensor sub-space learning method; and constructing a complex kernel extreme learning machine based on a conjugate augmented input, so as to predict the multi-modal frequency response of the tool nose point at the target posture.

Classes IPC  ?

• G06N 3/04 - Architecture, p.ex. topologie d'interconnexion
• B23Q 17/09 - Agencements sur les machines-outils pour indiquer ou mesurer pour indiquer ou mesurer la pression de coupe ou l'état de l'outil de coupe, p.ex. aptitude à la coupe, charge sur l'outil

Abrégé

Disclosed are a graded lattice energy-absorbing structure, a chiral cell thereof having programmable stiffness, and a 3D printing method. The chiral cell comprises a cell structure. The cell structure comprises an upper ring, a middle ring, a lower ring, upper connecting rods, and lower connecting rods. The upper ring and the lower ring have the same geometrical shape, and the middle ring is located between the upper ring and the lower ring. A plurality of upper connecting rods are provided; the two ends of each upper connecting rod are respectively correspondingly connected to the upper ring and the middle ring and the upper connecting rods are obliquely and uniformly distributed between the upper ring and the middle ring; a plurality of lower connecting rods are provided; the two ends of each lower connecting rod are respectively correspondingly connected to the lower ring and the middle ring and the lower connecting rods are obliquely and uniformly distributed between the lower ring and the middle ring. Therefore, the cell structure described in the present invention has a deformation behavior of axial compression torsion, and shows a zero Poisson's ratio characteristic in a compression process, i.e., in the compression process, the overall structure of the cell does not expand outwards, so that the cell itself has relatively high platform stress and good impact resistance.

Classes IPC  ?

• B32B 3/20 - Produits stratifiés caractérisés essentiellement par le fait qu'une des couches comporte des discontinuités ou des rugosités externes ou internes, ou bien qu'une des couches est de forme générale non plane; Produits stratifiés caractérisés essentiellement par des particularismes de forme caractérisés par une couche discontinue, c. à d. soit continue et percée de trous, soit réellement constituée d'éléments individuels caractérisés par une couche interne formée d'éléments individuels de pièces comportant des rainures ou des cavités
• B32B 3/14 - Produits stratifiés caractérisés essentiellement par le fait qu'une des couches comporte des discontinuités ou des rugosités externes ou internes, ou bien qu'une des couches est de forme générale non plane; Produits stratifiés caractérisés essentiellement par des particularismes de forme caractérisés par une couche discontinue, c. à d. soit continue et percée de trous, soit réellement constituée d'éléments individuels caractérisés par une couche de surface formée d'éléments individuels
• B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
• B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
• B33Y 10/00 - Procédés de fabrication additive

Abrégé

A low interception-oriented networking radar dwell time and radiation power joint optimization method, comprising S1, determining a networking radar system architecture and a task thereof; S2, taking dwell time and radiation power of radars as independent variables, constructing a prediction Bayesian Cramer-Rao lower bound matrix of a target state estimation error, and taking a trace of the prediction Bayesian Cramer-Rao lower bound matrix as a measurement index of target tracking precision; S3, taking a weighted sum Fk of dwell time resources and radiation power resources of radar irradiation targets at a moment k as an optimization target function; S4, establishing a low interception-oriented networking radar dwell time and radiation power joint optimization model; and S5, solving the low interception-oriented networking radar dwell time and radiation power joint optimization model by using an interior point method. Radio frequency radiation resource consumption of a networking radar system is reduced, and the low interception performance of the networking radar system is effectively improved.

Classes IPC  ?

• G01S 13/87 - Combinaisons de plusieurs systèmes radar, p.ex. d'un radar primaire et d'un radar secondaire
• G01S 13/72 - Systèmes radar de poursuite; Systèmes analogues pour la poursuite en deux dimensions, p.ex. combinaison de la poursuite en angle et de celle en distance, radar de poursuite pendant l'exploration
• G01S 7/282 - Emetteurs

Abrégé

The invention relates to the technical field of intelligent manufacturing. Provided is a method for diagnosis of a fault in a machine tool bearing, comprising: establishing a digital twin workshop, and loading a machining task to a machine tool in the digital twin workshop, wherein the digital twin workshop corresponds to a real workshop; acquiring fault data of the machine tool during a process of the machine tool executing the machining task, and generating fault diagnosis models of a first type according to the acquired fault data; performing variable working condition transfer learning training on the generated fault diagnosis models, and obtaining fault diagnosis models of a second type, wherein the fault diagnosis models of the second type include a model for diagnosis of a fault in a machine tool bearing in the real workshop; and using the fault diagnosis models of the second type to detect a fault in the machine tool bearing in the real workshop. The diagnosis method is applicable to monitoring of a machine tool workshop.

Classes IPC  ?

• G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques

Abrégé

A design method for optimization of a ceramic matrix composite material laminated prefabricated member, which takes into comprehensive consideration strength requirements for a component, geometrical outline, and characteristics of a laminated prefabricated member, and optimizes fiber volume fractions of respective layers constituting the prefabricated member and intra-layer fiber directions on the basis of a corresponding formula of mechanics, thereby providing optimized microstructures for the respective layers and fully exploiting the characteristics of the materials. The method is applicable in the optimization and design of various types of ceramic matrix composite material components.

Classes IPC  ?

• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]

Abrégé

An NARMA-L2 multi-variable control method based on a neural network, the method comprising: deducing an NARMA-L2 multi-variable control law of a nonlinear discrete system; offline identifying a nonlinear function in the control law by using a neural network; and designing a controller by using the control law, designing a closed-loop control system of a turbofan engine of a certain type, adding errors of the neural network on this basis so as to online correct parameters of the controller, and studying the tracking performance of the control system. According to the method, by using a neural network in combination with a deduced NARMA-L2 multi-variable control law, and taking the minimum error quadratic performance index of a high-pressure rotating speed and a pressure ratio of an engine as a target, a double-variable controller is designed, the control quantity of the engine is calculated, and a fuel oil flow rate and a critical interface area of an exhaust nozzle are controlled, such that the structure is simple, the control law is easily deduced, and a certain positive promotion effect is achieved for reducing the workload of the design of a controller and for designing a multi-variable control law.

Classes IPC  ?

• G05B 13/02 - Systèmes de commande adaptatifs, c. à d. systèmes se réglant eux-mêmes automatiquement pour obtenir un rendement optimal suivant un critère prédéterminé électriques

Abrégé

Disclosed in the present invention is a multipath suppression method based on a steepest descent method. The method comprises: firstly, according to carrier Doppler shift information fed back by a phase-locked loop, stripping a carrier from an intermediate-frequency signal input into a tracking loop; then, on the basis of the autocorrelation characteristics of a ranging code, constructing a quadratic performance function related to a measurement deviation of the ranging code, the performance function being not affected by a multipath signal; and finally, designing a new tracking loop of the ranging code according to the quadratic performance function and the principle of the steepest descent method, such that the loop has a multipath suppression function without increasing the computational burden. Compared with a narrow-distance correlation method, in the present invention, computing resources can be reduced by 1/3, the design and adjustment of parameters are simple and feasible, a multipath suppression effect is superior, and a high engineering application value is obtained.

Classes IPC  ?

• G01S 19/22 - Problèmes liés aux multitrajets

Abrégé

A highly-dynamic satellite tracking method based on a steepest ascent method. The method comprises: firstly, stripping a ranging code sequence; next, performing frequency mixing and fast Fourier transform processing on a carrier, so as to obtain the mapping relationship between a carrier tracking error and the maximum value of a fast Fourier transform (FFT) output amplitude spectrum; and finally, tracking the carrier according to the principle of a steepest ascent method. The highly-dynamic satellite tracking method can achieve a relatively high tracking accuracy in both static and dynamic environments, and the satellite tracking method does not need the assistance of an external sensor, does not need to know prior statistical information of noise in advance, has relatively good robustness and stability, and has relatively high engineering application value.

Classes IPC  ?

• G01S 19/29 - Acquisition ou poursuite des signaux émis par le système lié à la porteuse
• G01S 19/30 - Acquisition ou poursuite des signaux émis par le système lié au code

Abrégé

Disclosed in the present invention is a radiation power optimization design method for an airborne radar communication integrated system. The method comprises: S1, determining an airborne radar communication integrated system, the system simultaneously transmitting a plurality of beams to complete the functions of target tracking and communication data transmission; S2, constructing a range tracking error and angle tracking error expression that represents the target tracking performance of the airborne radar communication integrated system, and constructing a data transmission rate expression that represents the communication performance of the airborne radar communication integrated system; S3, establishing a radiation power optimization design model for the airborne radar communication integrated system; and S4, solving the radiation power optimization design model for the airborne radar communication integrated system established in step S3. By means of the method of the present invention, the radio frequency radiation resource consumption of an airborne radar communication integrated system is reduced, thereby effectively improving the radio frequency stealth performance of the airborne radar communication integrated system.

Classes IPC  ?

• H04W 52/18 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué selon des paramètres spécifiques
• H04W 52/26 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué selon des paramètres spécifiques utilisant le débit de transmission ou la qualité de service [QoS Quality of Service]
• G01S 7/38 - Moyens de brouillage, p.ex. production de faux échos
• G01S 7/282 - Emetteurs

Abrégé

Disclosed are a wear-resistant gradient interface complex-phase reinforced titanium alloy material and a preparation method therefor. The material comprises a titanium alloy matrix and a TiC ceramic reinforcement phase and a TiN ceramic enhancement phase dispersed within the titanium alloy matrix. The titanium alloy matrix is a titanium-aluminum-molybdenum-vanadium-zirconium alloy, wherein the aluminum content is 5.5-6.5 wt.%, the zirconium content is 1.6-2.0 wt.%, the molybdenum content is 1.0-1.5 wt.%, the vanadium content is 1.0-1.8 wt.%, and the balance is Ti. The TiC ceramic reinforcement phase accounts for 10-15 wt.% of the total mass of the alloy material, and the TiN ceramic reinforcement phase accounts for 10-15 wt.% of the total mass of the alloy material. A titanium-aluminum-molybdenum-vanadium-zirconium alloy powder and micron-sized TiC and TiN powders are used as raw materials, and a ceramic-reinforced titanium-based composite material is prepared by means of a selective laser melting technology after ball milling and powder mixing. A TiC-Ti(C,N)-TiN gradient interface structure is formed, thus improving the interface bonding between the ceramic reinforcement phases and the titanium matrix, reducing the tendency of the composite material to crack due to stress concentration during the melt rapid condensation, reducing cracks in a formed titanium-based composite material, and improving the forming quality and the mechanical properties thereof.

Classes IPC  ?

• C22C 14/00 - Alliages à base de titane
• C22C 1/05 - Mélanges de poudre métallique et de poudre non métallique
• C22C 32/00 - Alliages non ferreux contenant entre 5 et 50% en poids d'oxydes, de carbures, de borures, de nitrures, de siliciures ou d'autres composés métalliques, p.ex. oxynitrures, sulfures, qu'ils soient soient ajoutés comme tels ou formés in situ
• B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
• B33Y 70/10 - Composites de différents types de matériaux, p.ex. mélanges de céramiques et de polymères ou mélanges de métaux et de biomatériaux
• B33Y 10/00 - Procédés de fabrication additive

Abrégé

A radar target detection method based on pre-detection estimation, comprising the following steps: on the basis of conventional pulse Doppler processing and pre-detection, acquiring point-of-interest tracing prior information; estimating tracing range and speed parameters to implement pre-detection parameter estimation; on the basis of point-of-interest tracing parameters, establishing a dimensionality reduction observation model of a received signal; on the basis of a sparse restoration algorithm, reconstructing a target vector in the dimensionality reduction observation model; and, on the basis of the reconstruction result, designing a generalised likelihood ratio detector and performing target detection; radar signal processing loss can be significantly reduced, and the target detector has a constant false alarm rate feature, greatly improving weak target detection performance.

Classes IPC  ?

• G01S 7/41 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant l'analyse du signal d'écho pour la caractérisation de la cible; Signature de cible; Surface équivalente de cible

Abrégé

A method for the high-precision measurement of a degree of bending and a degree of twisting of a connecting rod, comprising the following steps: S1. arranging measuring heads; S2. obtaining coordinates of the measuring heads; S3. establishing a coordinate system; S4. measuring a target connecting rod; S5. calculating a degree of bending and a degree of twisting of the target connecting rod; S6. compensating for a thickness variation. The method can be integrated into an in-line measuring apparatus for a connecting rod to implement full-automatic measurement, and can greatly improve the measurement efficiency of connecting rods to an extent to match the current production efficiency of connecting rods. In addition, also provided is a measurement compensation method, capable of reducing an unexpected measurement error caused by a variation of the thickness of a measured connecting rod, thus further improving the measurement precision.

Classes IPC  ?

• G01B 7/24 - Dispositions pour la mesure caractérisées par l'utilisation de techniques électriques ou magnétiques pour mesurer les déformations dans un solide, p.ex. au moyen d'une jauge de contrainte à résistance en utilisant la variation des propriétés magnétiques

Abrégé

A helicopter air separation type emergency flight data recording system, comprising: an emergency state analysis system, an ejection system and a cushioning/floating system, wherein the emergency state analysis system is used for determining whether a helicopter is in an emergency state, and controlling the ejection system to be started when the helicopter is in the emergency state; the ejection system is used for ejecting the cushioning/floating system out from the helicopter; and the cushioning/floating system comprises: a radio transceiver, an electromechanical module and an air bag wrapping the electromechanical module, the electromechanical module comprises a flight data recorder and a gas generator, the gas generator generates, under the control of the flight data recorder, gas for inflating the air bag, and the radio transceiver is electrically connected to the flight data recorder and broadcasts a positioning signal. The system has the advantage of realizing intelligent and quick separation from an airplane, a strong capability in terms of high-altitude falling resistance, and floating on the surface of the water after falling into water, and easy search and rescue.

Classes IPC  ?

• B64D 25/18 - Dispositifs de flottabilité
• B64D 25/20 - Largage des indicateurs de position de détresse ou de chute
• B64D 45/00 - Indicateurs ou dispositifs de protection d'aéronefs, non prévus ailleurs

Abrégé

A composite material enhanced by a mixed woven fiber preform, consisting of a fiber preform, a composite material interface, and a matrix. The fiber preform is a three-dimensional fabric mixed and woven out of 2-5 types of high-performance inorganic fiber. The matrix is made of a resin, a light alloy, a carbon, and a ceramic. The preparation method of said composite material comprises: preparing a ceramic slurry, impregnating a fiber bundle, weaving the fiber, forming a preform with a three-dimensional integrated structure, heat treating the preform, preparing the interface, and preparing the matrix.

Classes IPC  ?

• C04B 35/80 - Fibres, filaments, "whiskers", paillettes ou analogues
• C04B 35/622 - Procédés de mise en forme; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques
• C04B 35/01 - Produits céramiques mis en forme, caractérisés par leur composition; Compositions céramiques; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes
• C04B 35/14 - Produits céramiques mis en forme, caractérisés par leur composition; Compositions céramiques; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de silice
• C04B 35/565 - Produits céramiques mis en forme, caractérisés par leur composition; Compositions céramiques; Traitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base de non oxydes à base de carbures à base de carbure de silicium
• C22C 47/00 - Fabrication d'alliages contenant des fibres ou des filaments métalliques ou non métalliques
• B29C 70/06 - Façonnage de matières composites, c. à d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p.ex. des inserts comprenant uniquement des renforcements, p.ex. matières plastiques auto-renforçantes des renforcements fibreux uniquement

Abrégé

A multi-open-circuit fault diagnosis method applicable to a multi-phase electric motor driver. Fault diagnosis variables are respectively constructed on the basis of a fundamental current and a harmonic current in a reference coordinate system, and auxiliary calculations, such as a moving average, are designed by means of fault feature analysis of the constructed variables under various open-circuit faults, such that a fault index is defined. For feature value expression of the fault index under the open-circuit faults, a threshold value determination method combining feature value measurement and a counting method is designed. Finally, a group of fault diagnosis marks is designed, and a multi-open-circuit fault diagnosis result of the multi-phase electric motor driver can be obtained by means of checking the values of the diagnosis marks in conjunction with a fault diagnosis table. According to the present method, multiple switch tube open-circuit faults of a driver can be detected; the method has strong robustness, and no false alarm signal is generated even under conditions where a sudden load change or a sudden rotation speed change occurs; and none of the calculations involves non-linear calculation, and compatibility with a low-end digital processor with a low processing capability is realized, and the requirements for the operational capability of the processor are not high.

Classes IPC  ?

• G01R 31/34 - Tests de machines dynamoélectriques
• G01R 31/327 - Tests d'interrupteurs de circuit, d'interrupteurs ou de disjoncteurs
• G01R 31/54 - Test de la continuité
• G01R 29/18 - Indication de la séquence des phases; Indication du synchronisme
• G06F 17/16 - Calcul de matrice ou de vecteur
• G06F 17/18 - Opérations mathématiques complexes pour l'évaluation de données statistiques

Abrégé

A non-cooperative game-based radar communication integrated networking system power control method, comprising: determining radar communication integrated networking system composition and propagation loss prior information of each path; respectively constructing a utility function of each radar communication integrated node related to target detection and related to communication data transmission; respectively establishing a non-cooperative game power control model related to target detection and a non-cooperative game power control model related to communication data transmission; and solving the non-cooperative game power control model related to target detection and the non-cooperative game power control model related to communication data transmission. The transmitting power of the radar communication integrated networking system is effectively reduced, and the purpose of improving the radio frequency stealth performance of the system is achieved.

Classes IPC  ?

• G01S 7/38 - Moyens de brouillage, p.ex. production de faux échos
• G01S 7/282 - Emetteurs
• G01S 13/66 - Systèmes radar de poursuite; Systèmes analogues
• H04W 52/18 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué selon des paramètres spécifiques

Abrégé

Disclosed is a networked radar optimal waveform design method based on a low interception performance under game conditions. The method comprises: acquiring a frequency response, an ambient clutter power spectral density, an interference waveform, and an ambient noise power spectral density of each radar node in a target relative networked radar system; establishing a networked radar optimal waveform design model based on a low interception performance under game conditions, with an optimization objective of minimizing the total radiation energy of the networked radar system under the game conditions and with a constraint condition of meeting a preset target parameter estimation performance mutual information threshold, and performing adaptive optimization design on a transmitting waveform of each radar node; and iteratively solving the optimization model by using a necessary Karush-Kuhn-Tucker condition, so as to obtain each radar transmitting waveform under the conditions of meeting a preset target parameter estimation performance and using each radar transmitting waveform as an optimal solution. Therefore, the low interception performance of a networked radar system under a binary zero-sum game condition is effectively improved under the constraint of meeting a preset target parameter estimation performance.

Classes IPC  ?

• G01S 7/38 - Moyens de brouillage, p.ex. production de faux échos

Abrégé

A radio frequency stealth transmission power optimization method for a sub-aperture-frequency diverse array radar, comprising: determining a composition of a sub-aperture-frequency diverse array radar system and target prior information; respectively representing the estimation performance of the sub-aperture-frequency diverse array radar system on a target distance parameter and an azimuth angle parameter by adopting a Cramer-Rao lower bound expression; establishing a radio frequency stealth transmission power optimization model for the sub-aperture-frequency diverse array radar; and solving for the radio frequency stealth transmission power optimization model for the sub-aperture-frequency diverse array radar. The method not only meets the requirements of estimating a Cramer-Rao lower bound threshold by a given target distance parameter and estimating the Cramer-Rao lower bound threshold by a target azimuth angle parameter, but also effectively reduces the transmission power of the sub-aperture-frequency diverse array radar system, thereby improving the radio frequency stealth performance of the system.

Classes IPC  ?

• G01S 7/40 - Moyens de contrôle ou d'étalonnage

Abrégé

A wearable cable-driven robotic arm system, comprising a wearable mechanism (a1), two robotic arms (a2) arranged on either side of the wearable mechanism (a1), a cable driving apparatus, a load-bearing trolley (a3), and an electric motor controller (e8). The cable driving apparatus is divided into an active part and a passive part. Heavy parts, such as an electric motor of the active part, are arranged within the load-bearing trolley (a3), thus reducing the load borne by the wearable robotic arms (a2). The load-bearing trolley (a3) is capable of travelling behind a person by means of cabling sleeves, and also is capable of being controlled to move by the electric motor controller (e8) via a signal detected by a following module. The passive part is joined with the robotic arms (a2). The passive part is driven by two cables and reduces the weight of the robotic arms (a2). A brain-computer interface module (a4) is employed to control the driving apparatus, thus increasing the precision and accuracy of the control over the robotic arms (a2).

Classes IPC  ?

• B25J 18/00 - Bras

Abrégé

Disclosed are a suspension release device for observing lander drop posture changes and a test method, belonging to the field of space exploration. The device comprises a rack system, a lifting system, a horizontal frame system, a posture control system and a suspension release system, wherein the lifting system is fixed on the rack system, the horizontal frame system can vertically slide on the rack system and can drive the posture control system to horizontally slide, and the suspension release system is hinged to the posture control system. A test lander is fixed to a release sliding block, the release sliding block and a main force bearing block are locked, the posture during release is adjusted, the horizontal frame system is lifted to a preset height, an electric motor indirectly drives a guide rod to release the sliding block, the whole machine freely falls and collides with the ground, and a high-speed camera records the process. The present invention avoids the shaking caused by rope suspension and the uncertainty of the posture during release before the release of a complete machine drop test, such that the body posture before the lander touches the ground can be simulated to a greater extent.

Classes IPC  ?

• G01M 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
• G01M 7/02 - Test de vibration
• G01M 7/08 - Test de résistance au choc
• G01C 1/00 - Mesure des angles
• H04N 5/232 - Dispositifs pour la commande des caméras de télévision, p.ex. commande à distance

Abrégé

maxmax. According to the method, the influence of the diameter D of the eddy current detection coil, and the eddy current excitation frequency f on the resolution of different defect depths d is taken into consideration, such that a designed differential eddy current detection system further satisfies detection requirements under high-speed operation, and guidance is provided for the subsequent evaluation of defect depth damage levels of a high-speed rail.

Classes IPC  ?

• G01N 27/90 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques en utilisant les courants de Foucault

Abrégé

Provided is a component-level non-iterative construction method for an on-board real-time model of a variable cycle engine. The component-level non-iterative construction method for an on-board real-time model of a variable cycle engine is provided by using an existing nonlinear component-level dynamic universal model of a variable cycle engine and by combining same with a modeling thought of an LPV model of an aircraft engine. In an original nonlinear component-level universal model of a variable cycle engine, components are connected together by means of a set of nonlinear coworking equations, and characteristic parameters of each component are obtained by iteratively solving the set of nonlinear coworking equations. This process of iteratively solving a set of nonlinear equations consumes a long time in a model running process. In the component-level non-iterative method for a variable cycle engine, this process of iteratively solving a set of nonlinear equations is replaced by an LPV model, such that the time consumed by a variable cycle engine model can be remarkably shortened with less precision loss, and the real-time performance of the variable cycle engine model is improved.

Classes IPC  ?

• G06F 30/15 - Conception de véhicules, d’aéronefs ou d’embarcations
• G06F 30/17 - Conception mécanique paramétrique ou variationnelle
• G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu
• G06F 119/14 - Analyse des forces ou optimisation des forces, p.ex. forces statiques ou dynamiques

Abrégé

The present invention relates to an ultrasonic vibration platform for processing a large part, and an operating process therefor. Said platform comprises: a piezoelectric ceramic transducer, a longitudinal vibration amplitude transformer, a bending vibration amplitude transformer, a vibration transmission rod, a stage, a front support, a rear support and a vibration isolation base; the 1/4 length position and the 3/4 length position of the bending vibration amplitude transformer are connected to the front end of the stage, two tail ends of a side face of the bending vibration amplitude transformer are connected to one end of the vibration transmission rod, and the other end of the vibration transmission rod is connected to the rear end of the stage. The piezoelectric ceramic transducer generates a longitudinal ultrasonic vibration under the action of an external excitation voltage, longitudinal vibration of the 1-stage longitudinal vibration amplitude transformer converts, by means of the bending vibration amplitude transformer, a single excitation ultrasonic longitudinal vibration into bending vibrations having multiple antinodes, and then converts the multiple bending vibrations into multiple longitudinal vibrations for outputting, so that the whole stage generates a longitudinal vibration. The present invention can achieve ultrasonic vibration processing of a large part.

Classes IPC  ?

• B24B 1/04 - Procédés de meulage ou de polissage; Utilisation d'équipements auxiliaires en relation avec ces procédés en soumettant les outils de meulage ou de polissage, les produits de meulage ou de polissage ou les pièces à des vibrations, p.ex. meulage en fréquence ultrasonore
• B06B 1/06 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie électrique fonctionnant par effet piézo-électrique ou par électrostriction
• B06B 3/02 - Procédés ou appareils spécialement adaptés pour transmettre des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore impliquant un changement d'amplitude
• B24B 41/06 - Supports de pièces, p.ex. lunettes réglables

Abrégé

A device and method for testing fracture toughness of a solid-ice interface on the surface of a coating material in a large-area icing status. In the test method, production and expansion of micro-fractures at a solid-ice interface are induced by adopting a single cantilever beam loading principle and using bending stress of a metal substrate; the test method aims to observe an interface fracture behavior between the surface of a coating material in which a metal serves as the substrate and an ice layer, so as to obtain interface fracture toughness between the ice layer and the surface of the substrate. According to the test method, the anti-icing performance of a large-area component coating material can be evaluated accurately, the operation is easy and convenient, the purpose of objectively evaluating the fracture toughness of the solid-ice interface under a large-area icing status is achieved, and important significance is brought industrial application and development of anti-icing surfaces. The test device comprises a force gauge (1), a laboratory test stand (2), a clamping means (3), and a high-speed microscope camera (4). The test device is simple in structure, ingenious in design, and easy to operate, and has a good using effect.

Classes IPC  ?

• G01N 19/04 - Mesure de la force d'adhérence entre matériaux, p.ex. du ruban adhésif, d'un revêtement

Abrégé

A defect type evaluation method based on fusion of an eddy current testing signal and a magnetic flux leakage testing signal, comprising the following steps: (1) simultaneously using an eddy current testing method and a magnetic flux leakage testing method to test the same sample; (2) dividing a magnetic flux leakage signal for defect detection, identifying and extracting signal features, and constructing a start point position matrix, an end point position matrix and a peak value position matrix of a defect magnetic flux leakage signal; (3) dividing the eddy current signal for defect detection, identifying and extracting signal features, and constructing a start point position matrix, an end point position matrix and a peak value position matrix of a defect eddy current signal; and (4) fusing the eddy current and magnetic flux leakage defect detection signals, evaluating a defect type, and obtaining an open defect matrix, a latent defect matrix and a suspicious defect matrix. The method fuses eddy current and magnetic flux leakage testing technologies, can quickly, effectively and accurately identify and extract defect signals, and evaluates a defect type, so as to distinguish an open defect from a latent defect.

Classes IPC  ?

• G01N 27/83 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques en étudiant des champs magnétiques de dispersion
• G01N 27/90 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques en utilisant les courants de Foucault

Abrégé

Disclosed is an ultrahigh temperature in-situ fretting fatigue experimental system. The ultrahigh temperature in-situ fretting fatigue experimental system comprises: a heat preservation cover (1), a heating device, a first test member (2), a second test member (3) and a clamping device, wherein a mounting space is formed inside the heat preservation cover (1), the heating device is arranged inside the mounting space, the first test member (2) and the second test member (3) are arranged, in a horizontal direction, at the upper end of the heating device, a dovetail groove is formed at an end of the first test member (2) which faces the second test member (3), a dovetail tongue matching the dovetail groove is formed at an end of the second test member (3) which faces the first test member (2), and the clamping device is arranged inside the mounting space and is suitable for clamping two ends of the first test member (2) and the second test member (3) when same are matched with each other, and applying a periodic reciprocating load in the lengthwise direction of the first test member (2) and the second test member (3).

Classes IPC  ?

• G01N 23/2251 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p.ex. rayons X ou neutrons, non couvertes par les groupes , ou en mesurant l'émission secondaire de matériaux en utilisant des microsondes électroniques ou ioniques en utilisant des faisceaux d’électrons incidents, p.ex. la microscopie électronique à balayage [SEM]
• G01N 23/2204 - Supports d’échantillons à cet effet; Moyens de transport des échantillons à cet effet

Abrégé

A micron silver particle-reinforced 316L stainless steel matrix composite material, comprising a 316L stainless steel matrix and silver particles that are uniformly distributed in the 316L stainless steel matrix; the silver particles account for 1-5% of the total weight of the composite material; and the density of the composite material is 7.9-8.2 g/cm3, and the compactness is above 98%. A preparation method therefor comprises: using spherical silver powder and spherical 316L stainless steel powder as raw materials, mixing same and then performing mechanical ball milling to obtain a mixed powder; after sieving, adding the mixed powder to a powder cylinder of an SLM forming machine; then, introducing an inert protective gas for printing, and obtaining said material. The silver particles are uniformly distributed in the 316L stainless steel matrix by means of SLM technology, the process is simple, time is saved, costs are low, and the prepared composite material has excellent electrical conductivity and corrosion resistance. The present invention is suitable for fuel cell bipolar plates and like technical fields having high requirements for corrosion resistance and electrical conductivity.

Classes IPC  ?

• B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
• B22F 9/04 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau solide, p.ex. par broyage, meulage ou écrasement à la meule

Abrégé

The present invention relates to the technical field of antennas and provides an unmanned aerial vehicle-based outdoor antenna four-dimensional pattern measurement method and apparatus. The measurement apparatus comprises a measurement path planning unit, an unmanned aerial vehicle platform unit, a radiation signal collection unit, a data instruction processing unit, and a ground data processing unit. The measurement path planning unit, the radiation signal collection unit, and the data instruction processing unit are suspended from the unmanned aerial vehicle platform unit by means of a nacelle. The present invention can be used for outdoor antenna pattern measurement.

Classes IPC  ?

• G01R 29/10 - Diagrammes de rayonnement d'antennes

Abrégé

The present invention provides a method and device for dynamic measurement and reconstruction of a wireless channel impulse response, belonging to the technical field of wireless communications. The device comprises a channel measurement transmitting unit, a channel measurement receiving unit, a channel model training unit, and a channel response reconstruction unit; said channel measurement transmitting unit comprises a transmission control module; the channel measurement receiving unit and the channel model training unit are connected to the channel response reconstruction unit, and the three share a receiving control module. The present invention is suitable for dynamic measurement and reconstruction of the impulse response of a wireless channel in complex non-stationary scenarios.

Classes IPC  ?

• H04B 17/391 - Modélisation du canal de propagation
• H04B 17/309 - Mesure ou estimation des paramètres de qualité d’un canal
• H04W 24/06 - Réalisation de tests en trafic simulé