474 results about "Displacement control" patented technology

The invention provides a power control method and a related device, and relates to the field of range extenders. After a hydraulic system working instruction is received, if it is determined that a power advance control strategy needs to be adopted, before the current of a hydraulic displacement control valve is adjusted according to the hydraulic system working instruction, the power advance control strategy is adopted; the power of an engine and the power of a target generator are adjusted to the total power required by the engine, which is calculated based on the target hydraulic power and the power generation required power, so that the current engine power can meet the power generation power requirement and the power requirement of a hydraulic system after responding to a working instruction of the hydraulic system; and then the hydraulic displacement control valve current is adjusted according to the hydraulic system working instruction, after the hydraulic displacement control valve current is adjusted, the hydraulic power begins to change, and during the hydraulic power change period, the power of the target generator can be adjusted based on the hydraulic power change, so that the engine can provide the hydraulic power needed by the hydraulic system in real time.

The invention provides a coffee machine mechanical arm acceleration compensation control method and device based on toppling spill prevention, and relates to the technical field of mechanical arm control. A coffee machine calls a real-time acceleration sequence from an acceleration control library after receiving a real-time order, and a pipetting mechanical arm moves along a pipetting collision-free track in the process of clamping an order coffee cup to move along the pipetting collision-free track; the liquid gravity center offset is measured in real time through a six-axis force sensor integrated on a clamping jaw, and lagging shake offset of a real-time acceleration sequence is carried out according to the real-time gravity center offset. The technical problem that in the prior art, when a mechanical arm of a coffee machine transports coffee drinks containing heterogeneous liquid, the displacement control stability is insufficient, and pouring and scattering are likely to happen is solved. The technical effects that the coffee liquid is effectively prevented from spilling and leaking in the transportation process, the transportation stability of complex coffee drinks containing ice blocks, foam and the like is remarkably improved, safety and high efficiency of collaborative operation of the multiple mechanical arms are ensured, and the delay or overflow risk caused by liquid shaking is greatly reduced are achieved.

A proportional servo valve spool displacement control method taking unknown hysteresis compensation into consideration. The control method is based on the idea of using a parameter adaptive law to learn an inverse model of an unknown hysteresis phenomenon and making a desired output signal undergo an estimated inverse hysteresis model in advance, thereby designing a non-linear robust position controller for online inverse compensation of the unknown hysteresis phenomenon. To address the problem of there being hysteresis nonlinearity in the output electromagnetic force of a proportional solenoid that drives a spool to move, the method can not only ensure the active elimination of unknown hysteresis nonlinearity, but can also eliminate other disturbances that are difficult to model in a spool motion system, thereby improving the operability and performance consistency of a hydraulic valve and realizing high-precision tracking of the spool position.

The invention discloses a digital hydraulic system and a control method. The system comprises a digital hydraulic valve, at least one hydraulic pump assembly and a controller. The digital hydraulic valve comprises at least one working unit, and each working unit comprises a main valve, a front differential pressure compensator and a pilot driving module used for driving and controlling the position of a valve element of the main valve. The differential pressure compensator adopts electric proportional control; the pilot driving module comprises a valve element displacement sensor used for detecting the actual displacement of a valve element of the main valve. The hydraulic pump assembly comprises a hydraulic pump, a variable displacement mechanism, a lead screw and a servo motor, the servo motor converts rotary motion into linear motion through the lead screw to directly control the variable displacement mechanism, and displacement control over the hydraulic pump assembly is achieved. An outlet of the hydraulic pump is connected to an inlet of the differential pressure compensator, an outlet of the differential pressure compensator is connected to an inlet of the working linkage main valve, and a working opening of the working linkage main valve is connected with the oil cylinder or the motor. And the servo motor, the differential pressure compensator and the pilot driving module are respectively in signal connection with the controller.

The invention discloses a method for rapidly and stably solving a buckling path after multiple critical points based on a generalized displacement control method. The method comprises the steps that S1, a state variable and an anchoring type secant predictor are initialized; s2, predicting a reference displacement, a calibration displacement and a load increment factor based on the state variable and the anchored secant predictor; s3, calculating the displacement increment of the current iteration step based on the reference displacement, the calibration displacement and the load increment factor, and updating the total displacement and the total load of the structure; s4, updating the geometric state of the structure and the internal force of the unit based on the displacement increment of the current iteration step; s5, calculating the difference value between the total internal force and the external load of the structure based on the updated geometric state of the structure and the unit internal force to obtain the unbalanced force of the structure, and performing error checking based on the unbalanced force of the structure; s6, executing the steps S1 to S5 circularly until the unbalanced force of the structure meets the balance condition, and starting the next increment step; and incremental analysis is executed until user requirements are met, and a buckling path after multiple critical points is output.

The invention provides a vehicle transportation control method and device based on a throwing box and electronic equipment, and relates to the technical field of throwing box control, a box body of the throwing box is connected with a vehicle through a 360-degree track, and the box body is correspondingly provided with a box body displacement control device; the method comprises the following steps: in response to a direction control operation for a driving direction control operation device, transmitting a direction control instruction corresponding to the direction control operation to a box body displacement control device; based on the direction control instruction, the specified vehicle body weight corresponding to the vehicle and a front road condition image of the vehicle acquired by an image acquisition device, analyzing and predicting the to-be-driven angle of the vehicle and the to-be-moved intensity of the vehicle through an AI system; and according to the to-be-driven angle and the to-be-driven moving intensity, the box body is controlled to move and / or rotate on the track through a box body displacement control device, so that the inertia force caused by the to-be-driven moving intensity and the to-be-driven angle to the box body is counteracted in advance through second displacement of the box body relative to the vehicle.

The invention belongs to the technical field of heavy-load vehicle control, and particularly discloses a bottom die trolley walking control method and system, and the control method comprises the steps: starting a task and setting parameters; collecting multi-dimensional data in real time; a displacement target is judged; calculating theoretical motion parameters; target torque distribution and instruction adjustment; and finishing the task and resetting the system. According to the control method, torque control, speed control, displacement control and energy consumption optimization are fused, a closed-loop feedback strategy, a fuzzy PID self-adaptive algorithm and a multi-motor cooperative algorithm are utilized, and track pre-detection and energy recovery are combined, so that the heavy-load and high-rigidity bottom die trolley can still run stably and accurately under the non-ideal track condition, and the control method is suitable for large-scale production. The control precision and stability of trolley running are remarkably improved, running deviation caused by poor rails and structural rigidity is reduced, the linear and dimensional precision of segmental beam prefabrication is guaranteed, and meanwhile the equipment failure rate, the maintenance cost and the energy consumption are reduced.

The invention discloses a hydraulic pump dynamic flow control method and system based on load feedback, and relates to the technical field related to hydraulic pumps, and the method comprises the steps that the load pressure of a hydraulic pump is monitored in real time, a first load pressure signal is generated, and a target flow parameter is set; a load pressure-flow mapping graph is constructed through dynamic mapping; dynamically responding to generate load compensation parameters to carry out load control on load pressure; and deviation calculation is carried out on the target flow parameter based on the second load pressure signal, a flow deviation signal is obtained to carry out dynamic flow control on the hydraulic pump, a flow displacement control result is fed back to carry out real-time correction on the load compensation parameter, and a flow closed-loop backtracking control channel is constructed. The technical problems that in the prior art, the flow control response of the hydraulic pump is lagged under the variable load working condition, the control precision is insufficient, and the energy efficiency is low are solved, and the technical effects that the dynamic response speed, the control precision, the stability and the energy efficiency of flow control of the hydraulic pump are improved are achieved.

The invention discloses a conveying type transfer device for preventing steel pipes from shaking, and relates to the technical field of transfer devices.The conveying type transfer device comprises a supporting assembly, a conveying assembly and a transfer assembly, the supporting assembly comprises a support, multiple sets of bearing seats are symmetrically and fixedly connected to the top of the support, and driving shafts are installed between the multiple sets of bearing seats; a plurality of conveying rollers are fixedly connected to the outer surface of the driving shaft at equal intervals. According to the conveying type transferring device for the steel pipes, when the conveying type transferring device for the steel pipes is used, the multiple steel pipes can be blocked through the multiple inserting blocks, an inclined block is driven to move through operation of a third motor, the inserting blocks at any position can be controlled to move up and down through the displacement of the inclined block, and therefore the multiple steel pipes are controlled to slide down in sequence to be transferred and conveyed; and through position positioning and transfer control in the steel pipe transfer process, the conveying state of the steel pipes is stable, and the steel pipes are prevented from being collided and damaged in the conveying process.

The invention provides a method and a system for analyzing influence of local loading and unloading on deformation of an existing shield tunnel, and relates to the field of influence of foundation pit construction on the existing tunnel. The method comprises the steps that shield tunnel vertical additional stress caused by foundation pit excavation is calculated through a Mindlin stress solution; analyzing the influence of the longitudinal axial force on the flexural rigidity and shear rigidity of the circular seam joint, and dividing a joint deformation mode into three stages according to the relative magnitude of the axial force and the bending moment and the vertical displacement between rings; a tunnel displacement control equation is established based on a Winkler foundation model, loop iteration is conducted through a state space method, and the rigidity of a circular seam joint is dynamically adjusted to be matched with the final deformation mode of the circular seam joint; and finally, constructing a prediction system, and outputting a deformation value of the shield tunnel by inputting the number of iterations and parameters of a foundation pit, bolts, concrete and segments. By means of the method, deformation prediction of the existing shield tunnel can be achieved for foundation pit construction, an effective scientific basis is provided for foundation pit engineering construction, the problem that parameter decision of operators on a construction site is difficult is solved, and foundation pit engineering site construction is truly guided.

A cantilever type tension sensor with a probe structure relates to the technical field of force measuring structures and comprises a knife handle dynamometer, a knife head is detachably fixed at the head end of the knife handle dynamometer, a sensor signal leading-out wire is detachably fixed at the tail end of the knife handle dynamometer, and an elastomer beam is arranged on the knife handle dynamometer. And a metal resistance strain gauge connected with a sensor signal outgoing line is arranged on the elastomer beam. According to the utility model, the problem that the force value in the process cannot be detected and controlled in real time because the force value is controlled by the current of the motor or experience or displacement in the prior art is solved.

The invention discloses an interference compensation control method for a heave compensation winch. The method comprises the following steps: based on a state space model of a heave compensation winch system comprising a heave compensation winch and a pump station, establishing a backstepping controller through a backstepping control method; establishing a parameter online estimation module of the hydraulic motor of the heave compensation winch, and inputting and processing the initial identification parameters of the hydraulic motor and the dynamic regression vector of the hydraulic cylinder to obtain the identification parameters of the hydraulic motor updated in real time; and inputting the identification parameters and the operation parameters of the heave compensation winch into a backstepping controller, outputting a valve core displacement control instruction of a proportional servo valve of a pump station after processing, and further realizing interference compensation control of the heave compensation winch by controlling the pump station. By means of the method, high-precision tracking and robust stability control over the heave compensation winch system can be still kept under the conditions that the model is uncertain and disturbance is strong, and support is provided for the underwater high-precision operation requirement.

The invention discloses an active suspension practical specified time control method based on a period lag sliding mode, and belongs to the field of automobile active suspension control. The control method comprises the following steps: 1, establishing a half-vehicle active suspension model with system uncertainty; 2, separating uncertain items of the system, and constructing a tracking error control model of the height and the attitude of the vehicle body; and 3, based on a periodic lag sliding mode control method, respectively designing a vehicle body displacement control law and a vehicle body attitude control law. The method is applied to automobile active suspension control.

The invention relates to a power device crimping device, and belongs to the technical field of power device manufacturing, and the device comprises a pressure control unit which is used for generating and regulating crimping force applied to a power device, monitoring the value of the crimping force in real time, transmitting the monitoring data to a control module, and adjusting the crimping force according to the instruction of the control module; the displacement control unit is used for controlling the displacement of the crimping execution component to adjust the crimping position and feeding back the crimping position to the control module, and the control module sends a control instruction to the displacement control unit according to the preset crimping position and the fed-back crimping position; the temperature monitoring unit is used for monitoring the temperature in the crimping process of the power device in real time and transmitting the temperature data to the control module; the control module receives data of the pressure sensor, the displacement sensor and the temperature monitoring unit and has the advantages that the control module sends control instructions to the pressure control unit and the displacement control unit according to temperature parameters, and accurate control is achieved.

The invention relates to the technical field of titanium alloy solid-phase pressure friction welding, in particular to a complex uniform-section titanium alloy profile deep cavity curved surface linear friction welding reinforcement process method which comprises the following steps: S1, equipment preparation: a titanium alloy Y profile and a rib plate are respectively clamped in an upsetting cylinder and a vibration cylinder of a hydraulic linear friction welding platform; the alignment precision is controlled to be smaller than or equal to 0.05 mm and the hydraulic clamping force is controlled to be smaller than or equal to 40 kN through a fine adjustment S2, parameter setting: based on finite element simulation, setting the amplitude of + / -5mm, the frequency of 50Hz, the friction pressure of 70kN, the upsetting pressure of 75kN, the upsetting time of 30s and the axial shortening amount of 5mm, and adopting a displacement control mode; according to the method, the reserved sectional area of the blank is reduced, the load and energy consumption of extrusion equipment are reduced, the manufacturing period is shortened, the material utilization rate is increased, the joint structure uniformity is improved through thermal-mechanical coupling regulation and dynamic recrystallization, the forming precision is improved, cutting waste liquid and dust emission is avoided, and the technological process is low-carbon and energy-saving.

The invention discloses a four-degree-of-freedom helicopter tail rotor load measuring device in a wind tunnel, belongs to the technical field of helicopter tail rotor load measurement, and aims to solve the problem that an existing helicopter tail rotor wind tunnel test lacks Z-direction accurate displacement control. Comprising a tail rotor assembly and a Z-direction adjusting mechanism, the Z-direction adjusting mechanism comprises a barrel, a Z-direction bearing seat and a Z-direction motor mounting seat are arranged at the bottom of the barrel, a Z-direction lead screw is in running fit with the Z-direction bearing seat, an output shaft of a Z-direction driving motor is coaxially connected with the lower end of the Z-direction lead screw through a Z-direction speed reducer, a Z-direction nut is in threaded fit with the Z-direction lead screw, and a sliding sleeve is connected with the Z-direction nut. The upper end of the sliding sleeve is connected with the lower end of the tail rotor supporting rod, the middle of the tail rotor assembly is hinged to the upper end of the tail rotor supporting rod, the yaw adjusting mechanism is arranged on the rear side of the tail rotor supporting rod, the output end of the yaw adjusting mechanism is hinged to the rear portion of the tail rotor assembly, and the tail rotor stand column is fixed to the output end of the XY-direction adjusting mechanism. The requirement for Z-direction movement of the helicopter tail rotor can be met.

The application discloses a pre-tensioning method bridge threaded steel grading step-by-step synchronous tensioning device and tensioning method. The device comprises a steel beam, a jack assembly, a support assembly, a large counterforce frame, an anchoring assembly, a hydraulic pump station, an inclination sensor and a control assembly. The jack assembly comprises an upper jack unit and a lower jack unit. The piston rod ends of the upper jack unit and the lower jack unit are connected with the large counterforce frame through universal ball head structures. The hydraulic pump station is connected with the upper jack unit and the lower jack unit respectively. The inclination sensor is arranged on the side surface of the large counterforce frame. The control assembly is electrically connected with the hydraulic pump station and the inclination sensor respectively. The application can adapt to the tensioning working condition of the differentiated reinforcement on the upper and lower beam bodies, realize the collaborative synchronous tensioning of the jacks with different tonnages, and has the advantages of uniform tensioning stress, high displacement control precision, simple structure, economy and reliability, effectively reduced beam body deformation risk and improved overall quality of the bridge prestress construction.

The invention discloses a displacement control method of a walking closed system and engineering mechanical equipment, the walking closed system comprises an engine, a closed pump, a front motor and a rear motor, the displacement control method comprises the following steps: S1, detecting a brake signal, and if the brake signal is detected, turning to S2; s2, the displacement of the closed pump is decreased at the initial change rate, and the displacement of the front motor and the displacement of the rear motor are increased at the initial change rate; s3, the vehicle state of the vehicle at the current moment is detected, and the vehicle state of the next moment is calculated and estimated; s4, inputting the pre-estimation result into a decoupling network for decoupling, adjusting the displacement change rate according to the relationship between the pre-estimated and calculated vehicle state at the next moment and a preset limit range, and outputting the adjusted displacement change rate; and S5, replacing the displacement change rate at the previous moment with the adjusted displacement change rate, and turning to the step S2. According to the method, the problems of brake side oil way pressure impact, driving side air suction and engine overspeed in the brake process of the hydraulic walking closed system are solved.

The application relates to a micro-pressure pressure instrument auxiliary detection automatic leveling device and method, a high-precision inclination sensor is connected with an upper computer, signals collected are transmitted to the upper computer, the upper computer is connected with an electric control angular displacement controller, signals processed are input into the electric control angular displacement controller, the electric control angular displacement controller is connected with a precision electric pendulum table, the precision electric pendulum table is controlled to correct X and Y axes according to signals, the precision electric pendulum table is installed above a base, and a workbench is installed above the precision electric pendulum table. The application is used for detecting and calibrating various micro-pressure pressure instruments in laboratories and online detection, can greatly improve the accuracy of detection or calibration results of micro-pressure pressure instruments, especially micro-differential pressure transmitters and micro-differential pressure digital tables, and the automatic adjustment design of the whole device can be used for online detection and can be applied to the detection and calibration fields of other instruments.

The invention discloses a variable-displacement water pump for an engine and a water pump displacement control method, and relates to the technical field of water pumps, the variable-displacement water pump comprises a pump body, an impeller disc, an elastic part and a driving part, a pump shaft is rotationally connected to the center of the pump body, an impeller cover is fixedly connected to one end of the pump shaft, and a plurality of blades are arranged on the face, facing the pump body, of the impeller cover in the circumferential direction; the impeller disc sleeves the pump shaft, the impeller disc and the impeller cover are coaxially and oppositely arranged, the impeller disc can slide in the axial direction of the pump shaft, the impeller disc is provided with holes allowing the blades to penetrate through, the hole walls of the holes and the peripheral surfaces of the blades define liquid drainage intervals, the pump shaft is sleeved with the elastic piece, one end of the elastic piece abuts against the impeller disc, and the other end of the elastic piece abuts against the impeller disc. The driving part is arranged on the face, away from the impeller cover, of the impeller disc, the driving end of the driving part abuts against the impeller disc, and the acting force of the elastic part is opposite to that of the driving part. The size of the liquid drainage interval is adjusted through cooperation of the driving piece and the elastic piece, and variable displacement and oil consumption reduction are achieved.

The utility model relates to the technical field of positioning electric cylinders, in particular to a miniature electric cylinder with a positioning function and suitable for high and low temperatures, which comprises a machine body, a speed reducer is mounted on the inner wall of a cavity, a driving gear is fixedly connected to the outer wall of the speed reducer, a driven gear is meshed with the outer wall of the driving gear, and a bearing is fixedly connected to the outer wall of the driven gear. The outer wall of the bearing is fixedly connected with a main shaft, the top end of the machine body is fixedly provided with a limiting switch, through the limiting switch at the top end of the machine body, the electric cylinder is provided with a positive limiting switch and a negative limiting switch, the movement range of the electric cylinder can be accurately controlled under the DC5V driving voltage, the rated thrust of the electric cylinder reaches 50N, and the thrust requirement in a common working scene can be met; the rated pushing speed of the electric cylinder is stable 4 mm / s, the stability of linear motion is ensured, the effective stroke is set to be 20 mm, displacement control is more accurate, in addition, the electric cylinder can bear radial force as high as 20 N, and therefore the structural stability and reliability in the running process are ensured.

This invention discloses an intelligent numerically controlled pressure system platform for reciprocating extrusion and a method for using the same. [Solution] The intelligent numerically controlled pressure system platform for reciprocating extrusion includes a mold clamp / temperature control system, a platform precision displacement control system, a base, a PC, and a temperature / displacement monitoring sensing control system. The PC is communicated to the mold clamp / temperature control system, the platform precision displacement control system, the mold control platform, and the temperature / displacement monitoring sensing control system. The mold control platform is provided with an auto-leveling system. The auto-leveling system is communicated to the platform precision displacement control system. According to the present invention, the operation of the pressure system can be precisely controlled, and the operating state and important parameters can be monitored online in real time, making it highly versatile.

The present application discloses a motor rotation angle control method, device and system. First, according to a preset second-order derivative function of jerkiness, the target angular displacement of each angular displacement control period is configured. Then, with the angular displacement control period as a period, the rotation angle of the target motor is periodically controlled according to each target angular displacement until the actual angular displacement of the target motor reaches the preset target angle. The second-order derivative function of jerkiness is a piecewise step function, so it can be integrated over its domain to obtain a first-order derivative function of jerkiness without a mutation point, and then integrated to obtain a smooth jerkiness curve. Integrating the smooth jerkiness curve can obtain a smooth acceleration curve. Since there is no acceleration mutation, a smoother angular displacement curve can be determined using a smooth acceleration curve compared to a piecewise step acceleration curve, thereby reducing the degree of impact during the motor rotation process.

The invention provides a thermal shock test device and a test method, and belongs to the technical field of aero-engine hot end component detection. The test device comprises a test rack body, a heating assembly, a displacement control assembly and a cooling assembly, the test rack body is provided with a placing space for the heating assembly, the displacement control assembly and the cooling assembly; the heating assembly is provided with a channel opening; the displacement control assembly is arranged on the test rack body and is used for moving a test piece into the heating assembly through the channel opening or moving the test piece out of the heating assembly; and the cooling assembly is arranged on the test rack body and is used for cooling the test piece pulled out of the heating assembly. The test device can be used for carrying out thermal shock test on a test piece.

The application discloses a kind of robot friction stir welding force-position hybrid control method, it is related to robot welding control technical field, comprising the following steps: step S10 establishes the hybrid strategy model based on constant displacement control and constant pressure control, the trajectory deviation caused by flexible deformation is compensated by robot dynamic offset function;The constant displacement control monitors welding depth in real time by laser sensor, the laser sensor is installed in 45° oblique direction to the outer wall of motorized spindle, and the collection point is located in the front side of the welding advancing direction, to avoid the interference of flash;The constant pressure control is collected axial upset force by six-dimensional force sensor, and force feedback type impedance control strategy is adopted.The robot friction stir welding force-position hybrid control method compensates the flexible deformation of robot by dynamic offset function, combined with the hybrid strategy of constant displacement and constant pressure control, solves the problem of uneven weld forming under single control mode.

The utility model discloses a kind of test equipment for pneumatic control valve or actuator in the field of pneumatic actuator detection, including valve displacement measuring instrument and control cabinet;Control cabinet is delivered to pneumatic control valve or actuator and measures the pressure of compressed air, valve displacement measuring instrument measures the displacement of pneumatic control valve or actuator;The controller of control cabinet transmits pressure and displacement data to PC host computer by Ethernet, and PC host computer generates the detection report of pneumatic control valve or actuator.The utility model can improve the detection quality and efficiency of pneumatic actuator, improve the production efficiency of pneumatic actuator production enterprise, meet the increasing delivery requirement, solve the problem of low efficiency of factory inspection, stroke etc. rely on visual inspection, realize the digitization and intelligentization of production final inspection.

The present invention provides a rolling device for plate-shaped components of electromechanical equipment, which relates to the field of rolling and comprises: a device body; a freely rotatable rotating roller installed inside the device body; a positioning member having a circular ring structure having a diameter larger than that of the rotating roller; a rotating assembly installed at the top of the device body via a mounting assembly; and the two rotating assemblies are connected to a transmission belt via a tooth groove. A motor simultaneously drives the two rotating assemblies to rotate via a transmission belt, and the rotating assembly controls the synchronous rotational displacement of two force-bearing rod assemblies through threaded holes, thereby controlling the synchronous displacement of both ends of a driven roller, thereby achieving synchronous adjustment of the roller gap, and avoiding deviation in the roller gap at both ends of the driven roller when the roller gap is manually adjusted, thereby affecting the finished product of the plate-shaped component. This solves the problem of common electromechanical equipment plate-shaped component rolling devices, in which, when adjusting the roller gap, it is usually necessary to adjust the rotation of bolts at both ends separately, but the two bolts are adjusted asynchronously, which easily causes the rollers to tilt slightly.

The invention relates to the technical field of aero-engine starter systems, and discloses an axial displacement control type overrun clutch which comprises a clutch body, a damper and an output shaft, the clutch body comprises a deep groove ball bearing, an input shaft, a diaphragm spring set, a spline shaft, a fixing pin, a conversion lining, a ball bearing, a driving gear, a lock washer and a locking nut; the damper comprises a retainer, a damping block and a spring, the output shaft is supported on the starter shell through a deep groove ball bearing, the input end of the output shaft is provided with end teeth, and when the driving gear stretches out and is meshed with the end teeth, the transmission function is achieved. The output end of the output shaft is of an internal spline structure and serves as a torque output connector. By means of the torque-displacement conversion characteristic of the left-hand thread pair, accurate meshing and physical isolation disengaging of the input shaft and the output shaft are achieved. A three-stage transmission control structure is adopted and comprises a torque-displacement conversion module, a damping control module and a spiral meshing module, and the technical defects that a traditional inclined strut type clutch is polluted in lubricating oil, low in torque transmission efficiency and the like are overcome.

This application relates to the field of vehicle simulation technology, and particularly to a method and apparatus for simulating the compressive instability of vehicle exterior panels. The method includes: performing finite element modeling of the body-in-white to obtain a body-in-white model; dividing the exterior panel into multiple regions and assigning different thickness attributes to each region to obtain a target body-in-white model; applying constraints to the target body-in-white model to obtain a first target body-in-white model, and setting a pressure head on the exterior panel in the first target body-in-white model; establishing a surface-to-surface contact pair between the pressure head in the first target body-in-white model and the exterior panel to obtain a second target body-in-white model; and controlling the displacement of the pressure head based on the second target body-in-white model to perform compressive instability analysis on the exterior panel to generate compressive instability analysis results. This method can quickly and accurately assess the compressive instability of passenger vehicle exterior panels through preliminary simulation, reducing the risk of compressive instability on the sheet metal surface of passenger vehicle exterior panels.