113results about How to "Improve dynamic stability" patented technology

The invention relates to the technical field of robots, and discloses a leg structure and a humanoid robot. A motor template; the hip joint assembly is mounted on the thigh bracket and comprises a rotary mounting frame which is in assembly connection with the motor template; the first end of the hip linear actuator is rotationally connected with the thigh support, and the second end of the hip linear actuator is connected with the hip joint assembly; the shank support is connected with the lower portion of the thigh support through a knee joint assembly; the knee joint linear actuator is arranged on the thigh support, and the driving end is connected with the knee joint assembly; the foot support is connected with the lower portion of the shank support through an ankle joint assembly; the first end of the ankle linear actuator is rotationally connected with the shank support, and the second end of the ankle linear actuator is rotationally connected with the foot support. According to the humanoid robot, the corresponding linear actuators are arranged on the thigh support and the shank support, the space on the thigh support and the space on the shank support are fully utilized, the inertia of the leg structure is reduced, the response speed is high when the leg structure conducts corresponding actions, and the dynamic stability of the humanoid robot is improved.

The invention provides an axially parallel split permanent magnet-water lubricated composite bearing, which belongs to the technical field of bearing design, is applied to a ship propulsion shafting, and comprises a magnetic force bearing module, a magnetic shaft sleeve, a magnet mounting base and a water lubricated bearing. The magnetic force bearing module and the water lubricated bearing are arranged in parallel in the axial direction of the stern shaft. The water-lubricated bearing is arranged on one side close to the propeller and is wholly soaked in a working medium; the magnetic shaft sleeve of a cylindrical structure is installed on a stern shaft, and a stern bearing is attracted under the action of a permanent magnet array in the magnetic force bearing module. And the magnet mounting base is used for supporting the magnetic force bearing module and regulating and controlling the magnetic force. According to the integral permanent magnet-water lubricated composite bearing, the permanent magnets and the water lubricated bearing in the integral permanent magnet-water lubricated composite bearing are structurally split, the mutual restriction of a magnetic force bearing module and a water lubricated bearing module in the aspects of space, size and performance can be effectively eliminated, and the use flexibility is enhanced; the bearing distribution of the shaft system can be optimized, and it is ensured that the tail shaft system has good dynamic stability.

According to the lower limb structure and the humanoid robot, the lower limb structure comprises a yaw driving part, a pitching driving part, a thigh assembly and a shank assembly, the pitching driving part is connected with the yaw driving part, the yaw driving part is used for driving the pitching driving part to rotate around a yaw shaft, and the thigh assembly comprises a thigh shell and a driving mechanism; the thigh shell comprises a first shell and a second shell, the first shell and the second shell are connected in the first direction, one end of the second shell is connected with the pitching driving piece, the pitching driving piece is used for driving the thigh assembly to rotate around the pitching axis, and the driving mechanism is installed in the end, close to the pitching driving piece, of the thigh shell. The connecting face of the first shell and the second shell is a plane, the yaw axis coincides with the connecting face, the pitch axis intersects and is perpendicular to the yaw axis, the shank assembly is rotationally connected with the end, away from the yaw driving piece, of the thigh shell and connected with the driving mechanism, and the static stability and the dynamic stability of the humanoid robot are improved.

The invention relates to bio-based polyaryletherketone synthesized by a one-step method, and belongs to the technical field of interface coatings, and the bio-based polyaryletherketone resin is used as a main slurry suitable for a sizing agent and the like and is used for preparing an emulsion. The emulsion is prepared from the following components in parts by weight: 0.5 to 3 parts of bio-based polyaryletherketone resin, 0.2 to 5 parts of an emulsifying agent, 0.1 to 1 part of a flatting agent, 0.1 to 1 part of a lubricating agent, 0.1 to 1 part of a de-foaming agent, 0.1 to 2 parts of an adhesive, 0.2 to 1 part of an antistatic agent and 86 to 98.7 parts of de-ionized water; according to the polyaryletherketone resin disclosed by the invention, the compatibility problem of an interface coating and polyaryletherketone matrix resin is effectively solved, the regularity of a polyaryletherketone molecular chain segment is reduced by introducing a benzene ring and acetal ring structure into a polymer molecular chain, and a space is reserved for contact between a solvent and the molecular chain, so that the polyaryletherketone resin has excellent solubility. Meanwhile, the interface adhesion can be enhanced through diffusion and physical entanglement effects between the sizing agent and matrix resin, it is guaranteed that the sizing agent and the polyaryletherketone matrix resin have excellent compatibility, and the sizing agent further has good thermal stability. Therefore, the interface bonding between the carbon fiber and the resin can be further improved.

The invention discloses a high-stability GaN bidirectional device which comprises a substrate and a transition layer, a buffer layer, a back barrier layer, a channel layer and a barrier layer which are sequentially stacked on the substrate, a first grid electrode and a second grid electrode are prepared on a first hole injection layer and a second hole injection layer respectively, and the first hole injection layer and the second hole injection layer are located on the barrier layer; the first source electrode and the second source electrode are prepared on the barrier layer in an ohmic contact mode and located on the two sides of the first hole injection layer and the second hole injection layer; the first source electrode, the first hole injection layer, the second hole injection layer and the second source electrode are isolated from one another through passivation layers; from the angle of energy band, the valence band top of the back barrier layer is lower than the valence band top of the channel layer, so that the hole is prevented from being injected into the substrate. The device has the functions of bidirectional conduction and bidirectional voltage resistance, can effectively inhibit a current collapse effect caused by a surface trap and a substrate effect, and has high dynamic stability and low dynamic conduction resistance; the substrate can be connected with any source electrode and can also be electrically suspended so as to improve the breakdown voltage of the device.

The invention discloses an ABS control strategy optimization method and system based on indirect tire pressure monitoring. The ABS control strategy optimization method comprises the following steps that S1, vehicle driving state information is collected in real time; s2, the driving state information is processed, and the dynamic behavior of the tire is recognized; s3, estimating the tire pressure state of the wheel; s4, the braking risk in the current driving state is evaluated; s5, ABS control parameters are generated; s6, generating a control instruction and transmitting the control instruction to an ABS actuator; s7, adjusting the pressure of the hydraulic system; s8, evaluating the validity of the ABS control parameters, and adjusting the ABS control parameters based on a feedback result; and S9, outputting and displaying the working state information and the tire pressure information of the ABS. According to the ABS control strategy optimization method and system based on indirect tire pressure monitoring, the control strategy can be dynamically adjusted according to the actual operation state, and the braking performance and safety are improved.

The invention discloses a control method and device for a high-voltage direct-current transformer of a full-direct-current system. The control method comprises the following steps: on the basis of a traditional double-closed-loop control method, the voltage on an inductor is fed back to a current inner loop through a state observer to influence the generation of dq-axis reference voltage, that is, the secondary side modulation wave voltage is obtained through state observation; subtracting the secondary side modulation wave voltage from the primary side modulation wave voltage to obtain a voltage on an inductor, and feeding back the voltage on the inductor to the output of a current inner loop controller as a superposition term for generating a dq-axis reference voltage; the voltage outer ring enhances DC side damping by introducing a DC side virtual resistor, and corrects the reference current of the current inner ring. The voltage on the inductor is fed back to the current inner ring through the state observer to improve the current inner ring, the direct current side damping is enhanced by introducing the direct current side virtual resistor, cooperative control of the current inner ring and the voltage outer ring is achieved, the dynamic characteristic and stability of the current inner ring are improved, and the oscillation problem is solved.

The invention belongs to the technical field of pressure reducing valves, and particularly relates to a self-locking pressure reducing valve which comprises an inlet connector, a self-locking unit, a sealing head and a pressure reducing unit, and the self-locking unit comprises a self-locking shell, a coil assembly, a soft magnetic ring, a soft magnetic rod, a plane valve element base and a plane valve element; the sealing head is fixedly connected to the end, away from the inlet connector, of the self-locking shell. The pressure reduction unit comprises a pressure reduction shell and a pressure reduction structure arranged in the pressure reduction shell, the pressure reduction shell is fixedly connected with the sealing head, an air outlet is formed in the pressure reduction shell, and the air outlet is connected with a pressure reduction air channel formed by the pressure reduction structure. The coil assembly is used for driving the plane valve element to generate displacement to open or close the valve, the locking magnetic ring enables the valve to be kept in an open or closed state, the diaphragm is used for sensing pressure changes and driving the conical valve element to stabilize the outlet pressure of the valve, and the requirement that high-pressure gas at an inlet is reduced to a certain needed outlet pressure is met. And when the inlet pressure and the flow change, the outlet pressure can be kept unchanged.

The invention relates to the technical field of robots, and discloses a waist joint assembly structure, a waist structure, a humanoid robot and a robot. According to the waist joint assembling structure of the humanoid robot, a first bearing is arranged between the first connecting end of a first connecting piece and the eighth connecting end of a third connecting piece, so that the upper connecting piece and the lower connecting piece are dynamically supported at the end, away from an output flange, of a first joint module. The bearing support is additionally arranged outside the joint module, the overall load capacity of the dynamic support of the assembly structure can be improved, the service life of the joint module can be prolonged, the dynamic stability of the assembly structure can be improved, and the overall service life of the assembly structure can be prolonged.

The present invention discloses a low dynamic resistance enhanced GaN device. In the conventional enhanced HEMT enhanced device preparation process, an additional P-type doped GaN thin layer (i.e., p-GaN thin layer) is introduced by selectively etching the p-GaN epitaxial layer. The surface trap shielding effect and hole injection effect formed by the p-GaN thin layer in the device structure effectively suppress the ionization of traps in the device, and have a strong inhibitory effect on the current collapse effect. Therefore, the resistance degradation of the GaN device is improved, the dynamic stability of the device is improved, and the conduction characteristics of the device are optimized.

The invention discloses a flutter control method and a flutter control device for a high-aspect-ratio wing. The flutter control method comprises the following steps: acquiring an initial flutter speed of the wing; steel cables are installed on the wings, and pre-tightening force is applied to the steel cables in the flight state through a servo mechanism so as to limit torsion of the wings; acquiring the expansion flutter speed of the wing after the pre-tightening force is applied to the steel rope; starting a wingtip angular displacement sensor in the flight process of the unmanned aerial vehicle, wherein the wingtip angular displacement sensor is used for monitoring a wingtip torsion angle and a torsion angular speed in real time; and when the flight speed of the unmanned aerial vehicle exceeds the extended flutter speed, a servo mechanism is used for dynamic control. The problem of how to improve the flutter speed and enable the unmanned aerial vehicle to safely fly at a higher speed so as to improve the flight performance of the unmanned aerial vehicle is solved.

The invention relates to the technical field of brake-by-wire systems, in particular to an electronic mechanical brake structure for a brake-by-wire system. The caliper body is mounted on the bracket; the transmission mechanism is located in the support and comprises a driving shaft and a ball screw, one end of the driving shaft is arranged in the ball screw and rotationally connected with the ball screw, the outer wall face of the end, located in the ball screw, of the driving shaft and the inner wall face of the ball screw form a containing cavity, and an elastic assembly for driving the ball screw to move towards the driving shaft is arranged in the containing cavity; according to the invention, the driving shaft is matched with the ball screw, the driving shaft rotates to transmit torque to the ball screw, and the ball screw is pushed towards the driving shaft through the matching of the elastic element and the gasket, so that the ball screw and the driving shaft are matched more tightly, and the axial clearance of the ball screw is eliminated, thereby realizing more precise control.

The invention relates to an impact reduction protection structure for a space camera explosive bolt unlocking device, belongs to the technical field of space optical remote sensing, and solves the problem that an existing space camera explosive bolt unlocking device cannot give consideration to impact load, explosive bolt unlocking reliability and overall dynamic rigidity of a space camera. The structure mainly comprises an explosive bolt force transmission path passive control assembly, an adjustable elastic impact reduction assembly and a medium-high frequency impact response attenuation assembly. The explosive bolt top end protection cover and the explosive bolt tail end protection cover are arranged on the explosive bolt in a sleeving mode, and the high-K-value laminated spring arranged in the explosive bolt top end protection cover and the medium-high frequency impact response attenuation assembly arranged on the top of the explosive bolt top end protection cover are combined, so that energy generated when the explosive bolt is unlocked can be effectively absorbed; the influence of medium-high frequency impact response generated when the explosive bolt is separated on the space camera is reduced, meanwhile, the unlocking reliability of the explosive bolt and the dynamic rigidity of the space camera are guaranteed, and the applicability is high.

The invention provides a multi-stage variable-stiffness variable-damping composite bearing, which belongs to the technical field of bearing design and comprises a bearing bush 1, a variable-stiffness variable-damping interlayer and a metal shell, the bearing bush and the metal shell are of a cylindrical structure. The variable-rigidity variable-damping interlayer comprises a multi-stage variable-rigidity variable-damping cell element array, and cell elements are arrayed between the bearing bush and the metal shell in the axial direction and the radial direction of the stern bearing. The multi-stage variable-stiffness variable-damping bearing bush cell element is of a tower-shaped structure and comprises a plurality of stages of substructures. When each stage of substructure is designed, based on the actual dynamic load borne by the ship propulsion shafting, a material with proper elastic modulus and damping characteristics is selected; when material selection is limited, effective response to different load working conditions is achieved by adjusting the shape and size of the multi-stage variable-stiffness variable-damping cell element structure. The anti-abrasion capacity of the stern bearing can be enhanced, the service life of the bearing is remarkably prolonged, the influence of vibration on the structural service life and noise can be reduced, and the dynamic stability of a shaft system is remarkably enhanced.

The invention belongs to the field of product mechanical structure design, and discloses a pneumatic servo control type fan air valve which comprises a channel butterfly plate assembly, a pilot valve assembly, a torque motor assembly, a filter assembly, an upper die cavity assembly, a lower die cavity assembly and a pressure guide pipe. Gas introduced by a pressure guiding pipe sequentially passes through the filtering assembly and the pilot valve assembly to enter the torque motor assembly, the torque motor assembly adjusts the opening degree and exhausts the gas according to the magnitude of applied current, the gas flow subjected to opening degree adjustment enters the upper membrane cavity assembly, and a membrane type differential pressure structure is formed between the upper membrane cavity assembly and the lower membrane cavity assembly. The lower die cavity assembly controls the opening degree of the channel butterfly plate assembly according to the air pressure in the upper die cavity assembly, and the channel butterfly plate assembly is arranged on an airplane pre-cooling air path. According to the invention, the torque motor with extremely high precision and small adjustable flow is applied to the high-flow butterfly plate channel, so that stepless adjustment and high-precision adjustment of the temperature of the aircraft air source system are achieved, and the adjustment precision far exceeds the use requirement of + / -6 DEG C of a civil aircraft air source system, specifically, the adjustment precision can be within + / -1 DEG C. The valve is high in dynamic stability, rapid in response and stable and reliable in quality, and the product can meet the requirement for temperature adjustment of a civil aircraft air source system and can meet the requirement for the civil aircraft air source system.

The present invention provides a superconducting magnetic suspension damping system and a control method thereof, which relate to the technical field of superconducting magnetic suspension, and include a permanent magnet track, a suspension dewar, a superconductor block and a shunt damping system, wherein the superconductor block is arranged in the suspension dewar, and under the temperature environment provided by the suspension dewar, the superconductor block repels the permanent magnet track to provide a suspension force for the train; and the shunt damping system is arranged in the suspension dewar, and the shunt damping system is arranged on the inner wall of the suspension dewar, and when the train is running, the shunt damping system generates an induced magnetic field that repels the magnetic field of the permanent magnet track, and by arranging a vertical stabilizing component in the suspension dewar, through the electromagnetic induction phenomenon, the magnetic field gradient generated by the permanent magnet track in the vertical direction is utilized to reduce the vertical vibration of the train, improve the dynamic stability of the train, and improve the comfort of the train using this embodiment.

This invention relates to the field of precision mechanical control technology, specifically to a method based on a magnetoelectric converter and linearity control. The method includes: acquiring raw magnetic induction data through a magnetoelectric converter; obtaining a three-dimensional magnetic field distribution through electromagnetic field spatial mapping and extracting the axial gradient vector field; constructing a virtual magnetic streamline model based on this to identify local disturbance regions where magnetic field distortion exceeds a threshold; performing multi-scale time-frequency analysis on the data in this region to separate high-frequency fluctuations caused by mechanical vibration and low-frequency drift components caused by thermal deformation; inputting the two components into a cross-coupled compensation decision network to generate high-frequency suppression commands and low-frequency compensation trajectories, which are then merged to form a comprehensive drive signal for compensation. This method can accurately locate the source of linearity disturbance and perform targeted decoupling control of errors from different physical sources, improving control accuracy and stability under complex operating conditions.

The application relates to the technical field of robots, and discloses a kind of two-degree-of-freedom parallel ankle joint mechanism of humanoid robot and kinematics and mechanics solving method, including seven-link transmission structure, which is composed of two groups of closed-chain transmission of parallel four-bar linkages.Motor I and II are installed on the upper end of the lower leg, and the rotation drives link IV and III to move through link I, II, V and VI, and then coupled control ankle joint pitch and lateral freedom degree.The mechanism realizes load balancing of double motors through parallel transmission, improves equivalent torque, and can combine kinematics and mechanics solving method, so that precise control can be realized only by motor feedback, sensor cost is reduced, and is suitable for high stability motion demand of biped robot.

The utility model relates to the technical field of power assisting instruments, in particular to power assisting exoskeleton equipment which comprises a waist support, and a waist containing cavity with a wearing opening reserved in the front side is formed in the waist support. A waist fixing belt is arranged at a wearing opening of the waist accommodating cavity; two groups of thigh brackets are movably connected below the waist support along the outer sides of two legs of a wearer, and thigh bandages are arranged on the thigh brackets; a shank support and a foot support which are movably connected with each other are sequentially arranged below the thigh support. The thigh support, the shank support and the foot support provide support for the lower body of the user, especially when the user walks, stands or does other activities. The telescopic supporting rod can stretch out and draw back according to the actions of the user, power assistance is provided for the leg actions of the user, the user is helped to walk, lift the legs and the like more easily, and therefore the physical burden of the user is relieved.

The application discloses an anti-deformation crown-shaped cage of a super-speed motor bearing and a manufacturing method, and belongs to the technical field of motor bearings. The anti-deformation crown-shaped cage of the super-speed motor bearing is printed by a functionally graded material, the functionally graded material comprises hard-phase material and soft-phase material, the hard-phase material is glass fiber, and the soft-phase material is nylon 66; the equivalent elastic modulus of the functionally graded material continuously and gradually changes along the axial direction from the bottom of the pocket hole to the end of the locking claw, so that the elastic modulus of the bottom area of the pocket hole is higher than that of the end area of the locking claw, and the ovalization deformation of the pocket hole and the centrifugal deformation of the locking claw are cooperatively inhibited; the functionally graded material is introduced to actively reconstruct the stiffness field of the crown-shaped cage; the toughness phase is constructed in the locking claw area to absorb collision energy, the reinforced phase is formed in the pocket hole area to weaken stress concentration, and the stiffness gradient is established at the connecting position to inhibit the umbrella effect; and the application provides the crown-shaped cage with the characteristics of high toughness, gradient and high strength and a design method thereof.

The invention provides a multi-dimensional vibration platform with oppositely-arranged double-sandwich piezoelectric actuators and an excitation method of the multi-dimensional vibration platform, and belongs to the technical field of high-frequency vibration engineering and micro-nano machining.The vibration platform comprises a center platform, the two oppositely-arranged piezoelectric actuators, two end covers and two bolts, wherein the center platform is integrated with the tail end platform, the two flexible hinges and the two amplitude-change poles, and the center platform is slender and is in mirror symmetry about the longitudinal symmetry plane of the tail end platform. The piezoelectric actuator comprises a longitudinal vibration ceramic group, a bending vibration ceramic group around the Y axis and a bending vibration ceramic group around the Z axis, translation along the X / Y / Z axis and rotation around the Y / Z axis can be realized through in-phase or anti-phase excitation different combinations under the condition of not increasing extra driving channels, and five-degree-of-freedom high-frequency micro-vibration output can be achieved at most. The structure has high symmetry, low parasitic vibration, compact size and high integration, and is suitable for precise engineering scenes such as micro-nano processing, laser-assisted manufacturing, cell manipulation and active vibration suppression.

The present application relates to the technical field of pipeline construction, and provides a pipeline intelligent assembly robot and an automatic assembly method, the robot comprising: a mobile carriage provided with a plurality of supporting legs at the bottom, and each supporting leg is provided with a mobile pulley at the bottom; a mobile sliding rail provided on the top surface of the mobile carriage along the length direction of the mobile carriage; two sliding plates, each provided with a driving assembly and a lifting assembly, the driving assembly being used for moving the sliding plate along the mobile sliding rail; an image acquisition sensor provided on the sliding plate; an intelligent remote controller in communication connection with the driving assembly, the lifting assembly and the image acquisition sensor; wherein the lifting assembly is used for hoisting the pipeline, and the image acquisition sensor is used for acquiring the position information of the pipeline interface; the assembly method comprising: S1, transportation preparation; S2, visual positioning; S3, intelligent centering; S4, fixed evacuation; having the characteristics of compact structure, high assembly precision and high construction safety and efficiency.

The invention discloses a high-stability static pressure guide rail device for heavy equipment, and relates to the technical field of precision mechanical guide rails, the bottom surface of a movable sliding table is fixedly connected with a pull-down constraint support, a plane static pressure oil cavity group is located on the bottom surface of the pull-down constraint support, and the bottom end of a plane oil supply channel extends into the plane static pressure oil cavity group; and the V-shaped sliding rails are fixedly connected to the two sides of the bottom face of the movable sliding table, the V-shaped static pressure oil cavity sets are located on the side faces of the bottoms of the V-shaped sliding rails, and the bottom ends of the V-shaped oil supply channels extend into the V-shaped static pressure oil cavity sets. The comprehensive bearing capacity of the guide rail is remarkably improved, the large-load requirement of heavy equipment is met, the central plane supporting area provides main vertical bearing capacity, the double-V-shaped guide rail provides multidirectional constraint and auxiliary bearing, and the lateral constraint structure provides static pressure support in the horizontal direction.

The present application relates to the technical field of data processing, in particular to a data processing method and system based on unmanned aerial vehicle video and vector data fusion. By calculating the deviation of the predicted position and the actual detection position of each reference point in the image, the reference points with large errors are screened and the camera pose parameters are adjusted using the random consistency algorithm and the iterative optimization method to improve the projection accuracy and stability. Through grid division, corner detection and feature descriptor extraction, a reference point set is established, the parallax change standard deviation is introduced, and the unstable reference points with large fluctuations are removed to ensure the reliability of the pose solving process and the consistency of spatial registration. According to the registration and fusion of unmanned aerial vehicle video and vector geographic data, the problems of current vector element drift, occlusion determination difficulty and attitude error dynamic correction are solved, the spatial reality and dynamic stability of the augmented reality scene are enhanced, and the industrial needs of various application scenarios such as underground pipe network inspection are met.

The present application relates to the technical field of liquid flow control, and particularly relates to a kind of integrated perfusion and negative pressure suction pyelostasis control method, comprising: in the embodiment of the present application, according to the size of renal pelvis pressure and the difference of renal pelvis pressure at adjacent time, determine the severity of each time suspected problem, according to the difference of renal pelvis pressure in different period, and the change related situation of each dimension data in the same period, determine the corresponding pressure effective dangerous fluctuation factor of each time, to determine the control weight of each time renal pelvis pressure, to constitute time weight time sequence, and then output perfusion pump flow adjustment instruction and negative pressure suction pump flow adjustment instruction through fuzzy controller, realize pyelostasis control.The present application enhances the identification ability of the change trend of renal pelvis pressure data in key period by introducing time weight, so as to more accurately and more stably maintain the constant of renal pelvis pressure.

The utility model discloses a hydro-pneumatic spring with a heat dissipation function, and belongs to the technical field of hydro-pneumatic springs. The device comprises a hydro-pneumatic spring body, a floating piston, a one-way check valve, a cooler and a pipeline system. The floating piston achieves oil-gas isolation, the main piston divides an inner cavity of the cylinder body into a center cavity and an annular cavity, and the center cavity and the annular cavity are communicated through a piston rod damping oil channel and an external pipeline. The core innovation is that in the active cooling circulation, in the compression stroke, hot oil in a central cavity is pressed out, is forcibly guided into an external cooler through a one-way check valve to be cooled, and then is injected into an annular cavity; and in the stretching stroke, the oil flows back to the central cavity through the damping hole. By means of the structure, a double heat dissipation mechanism combining cylinder barrel convection radiation heat dissipation and oil liquid replacement convection heat dissipation is formed, the limitation that a traditional hydro-pneumatic spring only relies on a cylinder body for heat dissipation is broken through, the temperature of oil liquid and gas can be actively and efficiently controlled, temperature rise is remarkably restrained, and sealing reliability and system work stability are guaranteed.

The invention discloses an air magnetic spring with a cooling function, and belongs to the technical field of elastic elements. The device comprises an upper cover plate, a lower base and a main rubber air bag, and is characterized in that an upper auxiliary rubber air bag, a lower auxiliary rubber air bag, an upper magnetic ring and a lower magnetic ring are additionally arranged, the auxiliary rubber air bag is fixed to the center of the upper cover plate and the lower cover plate and located in the main air bag. The magnetic rings are embedded in the cover plates and pressed by the auxiliary air bag. And communicated cooling water channels are arranged in the upper cover plate, the lower cover plate and the auxiliary air bag. When the main air bag loses efficacy, the auxiliary air bag provides emergency buffering, and double failure protection is achieved in combination with repulsive force of the magnetic ring; under extreme impact, the repulsive force of the magnetic ring can enhance the breakdown resistance; the cooling water channel can effectively reduce the working temperature of the spring and delay rubber aging. The spring integrates the functions of failure protection, strong impact resistance and active cooling, and the reliability and environmental adaptability are remarkably improved.

The application discloses a flower-shaped solar photovoltaic module, which comprises a device base and a flower-shaped photovoltaic array, a plurality of cross support rods are arranged on the device base, one end of the cross support rods is connected to the device base, and the other end is connected to the flower-shaped photovoltaic array, the flower-shaped photovoltaic array comprises a flower center part and a plurality of petal parts, the petal parts are arranged outside the flower center part, and solar photovoltaic plates are arranged on the flower center part and the petal parts; in the application, the petal parts of the flower-shaped photovoltaic array are arranged outside the flower center part in a slanting angle direction and are overlapped, when the sunlight is directly incident, the effective light receiving area of the solar photovoltaic plates of the petal parts and the flower center part is completely unfolded, the three-dimensional overlapping structure makes the effective light receiving area greater than the plane occupied area, and the light coverage area can reach 120%-200% of the plane occupied area at noon.

The utility model discloses a kind of intelligent mower of quick detach self-locking cutterhead, it is related to mower technical field, including machine body;Output shaft, set in the bottom of the machine body, the output shaft is connected with the output end transmission of machine body internal drive motor;Base, fixed on the output shaft;Cutterhead assembly, including blade and the mounting seat for installing blade, the mounting seat is detachably connected on base;Manual unlocking mechanism, set on mounting seat, for the mounting seat and base fixed connection or disconnection;Centrifugal self-locking device, integrated in the base interior.The utility model passes through integrated electronic safety interlock system, through sensor and intelligent control, ensure that cutterhead is not correctly installed or locked when machine cannot start, and cutterhead state is monitored in real time in operation, immediately stop once abnormal, greatly improve the safety performance of product.

The invention provides a damping device, a workpiece table system and photoetching machine equipment. The damping device comprises an inner frame, a damper, an outer frame, a balance mass block and a bottom frame. A mask table, an objective lens unit and a workpiece table platform are arranged on the inner frame, and the workpiece table platform supports the workpiece table micro-motion part; an inner frame is arranged on the shock absorber; the shock absorber is arranged on the outer frame, the outer frame is further used for arranging the lighting unit, and the outer frame is used for being arranged on a foundation. The bottom frame is arranged on a foundation; a balance mass block is arranged on the bottom frame; and the balance mass block is used for arranging a workpiece table coarse moving part. According to the configuration, the dynamic stability of the photoetching machine vibration damping framework can be improved, the bearing requirement of the vibration damper is reduced, and the design difficulty and cost of the vibration damper are reduced.