Patents
Literature

277results about How to "Flexible" patented technology

Bionic double-joint flapping wing air vehicle

The invention provides a bionic double-joint flapping wing air vehicle and belongs to the field of aerospace. The bionic double-joint flapping wing air vehicle comprises a fuselage, a flapping wing driving device, a main wing, an aileron, a main wing joint, an aileron joint, an empennage driving device and an empennage. The bionic double-joint flapping wing air vehicle is characterized in that the fuselage comprises a fuselage transverse beam and two fuselage frameworks, wherein the two same fuselage frameworks are arrayed in parallel and are fixedly connected with the fuselage transverse beam; the fuselage transverse beam penetrates through the centers of the fuselage frameworks. The flapping wing driving device is fixedly connected with the fuselage frameworks; the main wing is connected with the fuselage frameworks by the main wing joint; the main wing can rotate relatively around the fuselage frameworks by taking the main wing joint as a rotary axis. The aileron is connected with the main wing by the aileron joint; the aileron can rotate relatively around the main wing by taking the main wing joint and the aileron joint as rotary axes. The empennage driving device 5 is fixedly arranged at the rear end of the fuselage transverse beam and the empennage is connected with the empennage driving device. According to the double-joint bionic flapping wing air vehicle, left and right flapping wing devices are fully symmetrical and the flight stability is improved.
Owner:BEIJING UNIV OF TECH

Aerodynamic derivative identification method and system based on wind tunnel free-flying test

The invention, which relates to the field of aircraft model identification technology, discloses an aerodynamic derivative identification method and system based on a wind tunnel free-flying test so that the flying state of the aircraft can be simulated truly and thus an accurate aerodynamic derivative is obtained. A wind tunnel free-flying test system is arranged and is used for carrying out freedom releasing testing on an aircraft model to obtain testing data; the obtained testing data are analyzed to obtain attitude and angular velocity information of the aircraft; a corresponding dynamic model is established and unknown parameters of the model are determined; according to an output error method based on a maximum likelihood method, state quantity values being corresponding attitude angle and angular velocity values as well as attitude angle and angular velocity values obtained by testing are substituted into an objective function and a derivative, iterative calculation is carried out, the objective function is optimized continuously and thus the derivative reaches a minimum value, and the unknown parameter value is determined to be an identification result. The identification process is simple; the model precision is high; and the convenience of model parameter acquisition is improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Discrete limited variable-speed input multiple-freedom-degree controllable mechanism type excavator

A discrete limited variable-speed input multiple-freedom-degree controllable mechanism type excavator comprises a multiple-freedom-degree connecting rod mechanism, an internal combustion engine and a transmission device, is driven by the internal combustion engine. The internal combustion engine distributes power to driving rods of the multiple-freedom-degree connecting rod mechanism through the transmission device, and a state of constant-speed driving of the driving rods and a state that some driving rods are static and other driving rods performs driving at constant speed can be achieved through manual operation of a clutch device and a reserving device in the transmission device. Mutual matched movement of a moving arm lifting branch chain, a bucket rod swing branch chain and a bucket overturning branch chain is achieved under the matching effect of several driving rod driving states, transformable complicated movement trails of a bucket can be achieved according to the intention of a user, and various complicated excavating operations are finished. The discrete limited variable-speed input multiple-freedom-degree controllable mechanism type excavator overcomes the shortcoming that a hydraulic excavator is high in hydraulic element manufacture cost and complicated in maintenance, avoids power limitation suffered by the driving rods of the multiple-freedom-degree connecting rod mechanism driven by a control motor, and facilitates field construction.
Owner:GUANGXI UNIV

Multimedia distributed command dispatching system based on mobile self-organized network

The invention discloses a multimedia distribution command and control system based on a mobile ad hoc network, relating to the technical field of mobile network multi-hop communication and a multimedia stream transmission method in communication technology. The system of the invention solves the problems brought about by the existing and traditional cluster mode command and control system that only voice transmission can be carried out, the command system can not be flexibly and quickly transferred, etc. The system consists of a plurality of movable terminals with the same configuration; the terminals can be fast and spontaneously organized to form mobile ad hoc networks, can realize the transmission of the multimedia stream through a multi-hop router, and can realize the aim of conducting command and modulation to other terminals by inputting control instructions to various mobile terminals. In the dispersed network constitution, a commander or a mobile terminal is allowed to conducting seamless interoperability to other terminals; the system supports transmission ways of singlecast and multicast, etc., the terminals of the system have equivalency, therefore, the system has good universality and expandability.
Owner:HARBIN INST OF TECH

Clamping spring feeding, pressing and mounting device of clutch master cylinder

The invention discloses a clamping spring feeding, pressing and mounting device of a clutch master cylinder. The clamping spring feeding, pressing and mounting device of the clutch master cylinder mainly comprises a locating mechanism, a piston pressing-down mechanism, a piston greasing mechanism, a clamping spring feeding mechanism, a clamping spring guiding mechanism and a clamping spring pressing mechanism. A shell of the clutch master cylinder is fixed by a locating sleeve of the locating mechanism. A piston is pressed and mounted through work of a standard air cylinder by the piston mechanism. The piston greasing mechanism is movably connected below the piston pressing-down mechanism to perform greasing on the piston. Through the work of the standard air cylinder, clamping springs are conveyed out gradually by the clamping spring feeding mechanism. The clamping spring guiding mechanism located under the clamping spring pressing-down mechanism can guide the clamping springs, and under the action of a conical groove, the clamping springs are strung. Finally, the clamping springs are pressed and mounted through the clamping spring pressing-down mechanism. The clamping spring feeding, pressing and mounting device is in linkage mechanically and electrically, the six mechanism are controlled to move on a sliding rail through the standard air cylinder, a limiting mechanism also plays a role, and therefore feeding, pressing and mounting can be automatically completed, and the clamping spring feeding, pressing and mounting device is easy to control and high in pressing and mounting accuracy.
Owner:HANGZHOU WOLEI INTELLIGENT TECH

Processing program creation device, numeric control device, processing system, processing program creation method, numeric control method, and processing program

This processing system includes: a processing program creation device (2) which is provided with a move instruction generation unit (21) for generating a move instruction, and an acceleration/deceleration instruction unit (22) for generating an acceleration/deceleration instruction (26) corresponding to each move instruction (25) on the basis of pre-set machine dynamics in order to command the generated acceleration/deceleration instruction (26) in the same block as the move instruction (25) using a number; and a numeric control device which is provided with a position instruction generation unit which stores a processing program to which has been added the acceleration/deceleration instruction (26) which is commanded in the same block with respect to the move instruction (25) using the number, generates a position instruction on the basis of the move instruction and the acceleration/deceleration instruction (26), and outputs the generated position instruction to a drive device for a machine tool. Therefore, it is possible to perform fine-grained instruction of acceleration/deceleration instructions (26) for each move instruction using numbers in order to achieve fine-grained and flexible operation of the machine tool corresponding to the processing.
Owner:MITSUBISHI ELECTRIC CORP +1

Preparation method of polymer electrolyte composite membrane for solid-state battery

The invention discloses a preparation method of a polymer electrolyte composite membrane for a solid-state battery, which comprises the following steps: adding a metal organic framework material and apolymer into an organic solvent, uniformly mixing, and carrying out electrostatic spinning to prepare a polymer/MOF fiber composite membrane; dissolving PEO and Li (TFSI) in acetonitrile, and preparing a PEO/Li (TFSI) composite film through a solution casting method; and respectively putting a PEO/Li (TFSI) composite film, a polymer/MOF fiber composite film and a PEO/Li (TFSI) composite film between the polytetrafluoroethylene films or on the surfaces of the polytetrafluoroethylene films in a sandwich structure, and cooling after hot pressing to obtain the polymer electrolyte composite film for the solid-state battery. According to the method, the good complexing capability of PEO and Li (TFSI) is utilized; the polymer/MOFs fiber composite membrane can provide support sites; an ordered lithium ion conduction channel can be provided by the microporous structure of the MOFs; anions of Li (TFSI) can be fixed in microporous channels, cation transmission is accelerated, and the conductivity and high voltage resistance of the material are improved, so that the conductivity of the material can reach 10 <-4 > S cm <-1 >, and the requirement of commercial all-solid-state polymer electrolyte on the conductivity is met.
Owner:HUBEI UNIV

Automatic marine telescopic accommodation ladder

The invention relates to an automatic marine telescopic accommodation ladder. The automatic marine telescopic accommodation ladder comprises a two-level accommodation ladder body, a telescopic driving device, a hoisting winch and a control system. The two-level accommodation ladder body comprises an upper accommodation ladder body and a lower accommodation ladder body. The top end of the upper accommodation ladder body is hinged to a ship body upper platform through a shaft pin. The upper accommodation ladder body and the lower accommodation ladder body are connected through a sliding rail. The telescopic driving device is installed between the upper accommodation ladder body and the lower accommodation ladder body. After steering transition through a pulley, the hoisting winch is connected with the tail end of the lower accommodation ladder body. The control system comprises a shaft pin type tension sensor installed on the pulley, an angle detection sensor installed at the top end of the upper accommodation ladder body, and a programmable logic controller (PLC). Electrical signals are transmitted between the PLC and the tension sensor, between the PLC and the angle detection sensor, between the PLC and the telescopic driving device and between the PLC and the hoisting winch respectively.
Owner:TAIXING EXPANSION MARINE EQUIP CO LTD

Billiard aiming method and special billiard aiming device

The invention relates to a billiard aiming method and a special billiard aiming device and belongs to the technical field of billiard training. According to the technical scheme, more than one auxiliary line of which the length is equal to the diameter or radius of each billiard extends from the central axis of a ball arm, the auxiliary line, a line with the endpoints aiming at the center of a target sphere or a collision point by using the auxiliary line, a connecting line of the center of a virtual sphere adjacent to the target sphere on an extension line of the connecting line of a pocket mouth and the center of the target sphere, and a line from the central axis of the ball arm which passes through the center of a cue ball to the other end of the auxiliary line form a parallelogram; by utilizing the principle that the corresponding sides of the parallelogram are parallel, when the auxiliary line is parallel to a connecting line between the pocket mouth and the center of the target sphere, the central axis of the ball arm is parallel to the line which aims at the center of the target sphere or the collision point, and the target ball can be shot into the pocket. The target ball can be directly aimed and shot, the aiming shot of a second target ball can be realized through pass shoot, even important reference indexes can be provided for aiming of bouncing balls.
Owner:刘佳林

Composite test apparatus of high-voltage direct current transmission converter valve

The invention relates to a composite test apparatus of a high-voltage direct current transmission converter valve. The composite test apparatus comprises a test valve Vt, a high voltage source (1), a high voltage source (2) and a direct current high current source. An auxiliary valve V5 in the direct current high current source is in series connected with the test valve Vt, so that a bridge arm of a 6 pulse bridge rectifier B6 in the direct current high current source is formed. The high voltage source (1), the high voltage source (2) and the test valve Vt are in parallel connection. The test valve Vt is in ground connection. And heavy currents of the direct current high current source are between 3000A to 5000A. According to the provided composite test apparatus in the invention, two independent high voltage sources are used for providing reverse high voltages and forward high voltages for a test valve during a blockout period, so that unsymmetrical blocking voltages are obtained; therefore, a voltage exerted on the test valve approaches one that is exerted on the test valve in an actual operation condition and thus test equivalence is good. Moreover, according to the apparatus, a control sequence is changed, so that several kinds of voltage combination can be realized; and thus, there are several selection choices on a test scheme with a flexible mode; and the application range of the apparatus is wide.
Owner:CHINA ELECTRIC POWER RES INST +1

Bidirectional forwarding detection (BFD) session creation method and BFD session system used for unidirectional path detection

The invention relates to the bidirectional forwarding detection technology of the field of network communication equipment and discloses a bidirectional forwarding detection (BFD) session creation method used for unidirectional path detection. The BFD session creation method used for the unidirectional path detection aims to resolve the problem that a tradition technology can not simultaneously meet the demands of simpleness, flexibility, multihop supporting and high safety. The BFD session creation method used for the unidirectional path detection is characterized in that a drive end and a driven end confirm identification information of creating BFD sessions in advance, the drive end creates the BFD sessions and send BFD control messages containing corresponding information to the driven end after receiving an order of creating the BFD sessions of an unidirectional upper application protocol, the driven end receives the BFD control messages sent by the drive end and separates the messages to corresponding BFD sessions after successfully executing message validity detection, when the messages are separated, if the driven end judges that a corresponding BFD session does not exist and the BFD control message needs identifying, then the identification information preset by the drive end and the driven end is used for conducting identification, and after the identification is passed, the BFD sessions are created. Besides, the invention further discloses a BFD session system which is suitable for network communication.
Owner:MAIPU COMM TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products