352 results about "Dynamometer" patented technology

The invention discloses a posture-adjustable underwater vehicle propeller multifunctional testing device and method. In the device, a first guide mechanism and a second guide mechanism which are arranged in parallel extend in the first direction and are both arranged outside one side of the top surface of a water tank in the height direction; one end of the slider mechanism is in sliding fit with the first guide mechanism, and the other end of the slider mechanism is in sliding fit with the second guide mechanism; one end of the posture adjusting mechanism is fixed with a box body mounted on the sliding block mechanism; a first spring and a second spring are installed on the two sides of the box body in the first direction. The other end of the first spring and the other end of the second spring are provided with a first dynamometer and a second dynamometer. The propeller driving module and the other end of the attitude adjusting mechanism are fixed through a fixing piece; propellers are mounted at the output shaft ends of the propeller driving modules; the hydrophone is installed on the side, close to the propeller, of the propeller driving module. The device is simple in structure, convenient to operate and easy to machine and popularize, and compared with a common test system, the device can simulate propeller flow noise characteristics under different working conditions and different postures.

The invention provides an engine in-the-loop semi-physical simulation test platform for a hybrid electric vehicle, which relates to the technical field of automobile engine testing and comprises a real-time virtual simulation platform and an engine transient test platform. The real-time virtual simulation platform comprises a driver model module, an energy management strategy module, a power assembly module, a vehicle dynamics module and an exhaust temperature control module. The driver model module carries out data calculation according to the output of the vehicle dynamics module, a vehicle dynamics model calculates a dynamics state threshold value, and energy management is carried out through the energy management strategy module; the engine transient test platform comprises an engine controller, a high-dynamic electric dynamometer, a dynamometer control system, an engine, a post-processing system, an emission detection system and a post-processing temperature control system. According to the platform, a real engine pedestal, a digital hybrid power whole vehicle model and a rapid prototype controller are deeply integrated, so that the model reusability is improved.

The utility model relates to a portable dynamometer torque calibration device, and belongs to the technical field of rack torque calibration. Comprising a force arm, one end of the force arm is fixedly connected to a dynamometer, the other end of the force arm is provided with a force value sensor, a force applying mechanism is arranged below the force value sensor and applies force to the force value sensor, and the force value sensor is used for detecting a torque value and then comparing the torque value with a torque value of the dynamometer. The force applying mechanism comprises a bottom plate, a fixed pulley is arranged on the bottom plate, a movable pulley is arranged at the bottom of the force value sensor, a supporting rod is arranged on the bottom plate, a force applying lever obliquely arranged downwards is hinged to the supporting rod, a chain is wound around the fixed pulley and the movable pulley, and one end of the chain is arranged at the front end of the force applying lever. And the other end of the chain is fixed on the bottom plate. According to the invention, when the force application mechanism is used for applying force, the force application is very labor-saving, the operation is convenient, time-saving and labor-saving, the quick calibration of the dynamometer torque on the rack site is realized, and the calibration efficiency is improved.

The application discloses an outboard motor testing system, which comprises a water tank, a supporting device for supporting the outboard motor above the water tank, two height adjusting mechanisms installed on the supporting frame, a turnover mechanism installed on the height adjusting mechanisms, a crossbeam installed between the two turnover mechanisms, a clamping device arranged in the water tank for clamping and fixing the testing end of the outboard motor, and a dynamometer arranged outside the water tank and connected with the propeller shaft of the outboard motor through a transmission shaft mechanism. The outboard motor testing system can improve the testing precision and efficiency.

The invention provides a device and a method for testing the shearing and compression performance of a helicopter engine damping part. The shearing performance testing device comprises a base (1), a fixed support (3), a stress application lead screw (4), a tension sensor (5), a dynamometer (6), a double-fork (7), an arc-shaped pulling plate (8), a mounting support (10), a dial indicator (11) and a magnetic base (12). The compression performance testing device comprises a base (1), a fixed support (3), a stress application lead screw (4), a tension sensor (5), a dynamometer (6), a mounting support (10), a dial indicator (11), a magnetic base (12), a single lug (13) and a square loading frame (14). Measurement of shear and compression deformation displacement of the engine damping member is realized, shear and compression performance of the engine damping member is verified, and the installed damping member is ensured to effectively prevent transmission of vibration waves and weaken harm of inertial impact to an engine. And the situation that the installation of the damping piece with substandard static performance affects the flight safety is avoided. The test cost is low, the operation is simple, the test efficiency is high, and the deformation displacement of the damping member can be visually reflected.

The invention relates to the technical field of automobile power system testing, in particular to a dynamometer and HIL integrated finished automobile multi-working-condition automatic testing and calibrating system, which combines a dynamometer rack with a hardware-in-the-loop simulation technology, develops a dynamics scene model covering conventional and limiting working conditions, and improves the testing accuracy of the dynamometer rack and the hardware-in-the-loop simulation technology. The conversion and interaction of virtual and real signals are realized through road load simulation and energy consumption simulation; the dynamometer and HIL integrated whole vehicle multi-working-condition automatic test calibration system is composed of IO, DOE, automatic calibration, objective evaluation and other functional modules, can automatically execute test cases, complete parameter calibration and optimization analysis, and perform objective evaluation on test results, and can realize multi-working-condition test, reduce the dependence on real vehicle road test, improve the test efficiency and comprehensiveness, and reduce the test cost. The controller development period is shortened, and the cost is reduced.

The invention discloses a torque measurement calibration method for a high-power dynamometer, and the method comprises the following steps: a torque measurement calibration device for the high-power dynamometer and the high-power dynamometer are installed, and the torque measurement calibration device for the high-power dynamometer comprises a lever, a standard dynamometer, a hydraulic force application device, a display control terminal and an inclinometer, one end of the lever is connected with the high-power dynamometer, the other end of the lever is attached to a pressure head of the standard dynamometer, the standard dynamometer is connected with the hydraulic force application device, the hydraulic force application device is connected with the display control terminal, the display control terminal communicates with the standard dynamometer and the inclinometer, the inclinometer is arranged on the lever, and the pressure head of the standard dynamometer is a conical pressure head. The lever is provided with a conical force application hole matched with a standard dynamometer pressure head; determining a force application hole position of the torque measurement calibration device of the high-power dynamometer; zero setting is carried out on the high-power dynamometer indicating device; and determining the torque metering accuracy of the high-power dynamometer. The method has the advantages that the length of the force arm is accurate and constant, the error is small, and the operation is safe.

The invention relates to a torque sensor high-speed rotation temperature coupling dynamic calibration system and calibration method. The device comprises a rotary driving device; one end of the standard torque sensor is connected with the output end of the rotary driving device; according to the temperature loading device, a mechanical rotor of a to-be-tested torque sensor is rotationally connected to a temperature cabin, and one end of the mechanical rotor of the to-be-tested torque sensor is connected with the other end of the standard torque sensor. The torque loading device comprises a magnetorheological fluid coupler and a dynamometer, the magnetorheological fluid coupler comprises a magnetorheological fluid box body, a coupler rotor, a slip ring electricity leading device and a rotor excitation coil, one end of the coupler rotor is connected with the other end of the mechanical rotor, and the rotor excitation coil is powered by the slip ring electricity leading device; the slip ring electricity leading device comprises a slip ring electricity leading device rotor assembly and a slip ring electricity leading device stator assembly. The other end of the coupler rotor is connected to the dynamometer. And high-precision dynamic calibration under the conditions of high-speed rotation and wide temperature range is realized.

The utility model discloses a flapping door locking force detection device, which comprises a mounting base, a moving mechanism, a lifting mechanism, a dynamometer and a displacement sensor, and is characterized in that the mounting base is mounted on a flapping door mounting table, the moving mechanism is mounted on the mounting base, the lifting mechanism is connected with the moving mechanism, and the moving mechanism drives the lifting mechanism to move; the dynamometer is mounted on the lifting mechanism, the lifting mechanism drives the dynamometer to lift, and the displacement sensor is mounted on the mounting base, so that the current situation that the locking force of the flap door unit cannot be accurately and quantitatively detected originally is changed, the equipment debugging and testing efficiency is improved, the flap door unit product testing and model selecting time of an owner is shortened, and the product testing efficiency is improved. And meanwhile, through the arrangement of the lifting mechanism, the height of the dynamometer can be conveniently adjusted, so that the device can detect the locking force of different positions of the flapping door, and the multi-position locking force measurement is realized.

The application provides a Park compensation method, device, medium and system of a permanent magnet synchronous motor. The method comprises: adjusting the permanent magnet synchronous motor to a positive rotation speed by using a dynamometer, taking a first preset rotation speed as an interval point, until the highest positive rotation speed, applying a field weakening current to the d-axis of the permanent magnet synchronous motor, obtaining a plurality of first initial angle calibration values respectively, and determining a Park compensation value according to all the first initial angle calibration values; obtaining a plurality of second initial angle calibration values respectively, and determining an angle correction value; determining a Park compensation radian value as a sum value of a compensation value product and an angle correction; and adjusting the rotor position of the permanent magnet synchronous motor by using the Park compensation radian value. Thus, the problem that the torque accuracy of the motor is low due to the angle compensation strategy of the existing scheme is solved.

The utility model belongs to the field of dynamometer installation equipment, and particularly discloses an adjusting device for adjusting the coaxiality of a large-scale motor, which comprises a motor, a fixed block, a jack and a dial indicator, the motor is placed on the upper end face of a workbench, and the outer side wall of a main shaft of the motor is contacted with a measuring head of the dial indicator of a measuring device; the fixing blocks are installed on the upper end face of the workbench through fixing bolts and located on the outer sides of the four corners of the motor. The jack is located between the motor and the fixing block, a base of the jack is connected with the fixing block through a screw, and a top block of the jack makes contact with a base of the motor. The adjusting device is simple in structure and convenient to install and use; the jack is used for pushing the motor to move, so that the construction difficulty of operators can be effectively reduced; the required moving distance can be calculated through the stroke parameters of the jack, so that the labor efficiency is effectively improved, and the adjusting difficulty is reduced.

The invention discloses an intelligent networked automobile indoor test system based on whole automobile in-the-loop simulation, which relates to the technical field of automobile intelligent networked system testing and comprises a four-upright steel belt rotating hub system, a road condition simulation system, an environment simulation system and a control system. The four-stand-column steel belt rotating hub system comprises four steel belt rotating hub machines, the four steel belt rotating hub machines support four tires of a vehicle respectively, and each steel belt rotating hub machine is connected with a dynamometer. The road condition simulation system comprises an LED screen, a projector, radar target simulators, a roadside communication unit and a V2X communication module, the radar target simulators are arranged at the two ends of the LED screen respectively, and the roadside communication unit is used for sending road information to a vehicle through the V2X communication module and simulating a road traffic environment; the environment simulation system comprises a lamp set, a water nozzle and a fog machine. The road traffic condition can be truly presented, the testing depth can be remarkably improved, potential function safety risks are eliminated, the cost is reduced, and the development period is shortened.

The utility model discloses a multi-point suspension high-speed dynamometer, and relates to the dynamometer technology. A front support seat and a rear support seat are respectively mounted at two ends of an outer circle of a base of the special motor, 5-11 shaft heads are radially and uniformly distributed in the front support seat and the rear support seat, 5-11 sets of front and rear suspension bearings are respectively assembled on the shaft heads, and outer rings of the front and rear suspension bearings are in radial rolling line contact fit with stop calibers at two ends of the outer circle of the base to form support points. A special motor is horizontally supported and fixed on a specific bedplate plane, so that the special motor is in a suspension state, a tested machine is installed on an external interface of a front end cover of the special motor, a shaft extension of the special motor is connected with a shaft extension of the tested machine through a coupler, and a boss in the middle of the left side of a base of the special motor is connected with an installation interface at one end of a tension sensor. The other end mounting interface of the tension sensor is connected with the left middle part of the platen plane; the structure is compact, vibration is small, noise is low, and reliable operation of the dynamometer at a high speed or an ultra-high speed is achieved.

1. The name of the design product: adjustable grip distance hand dynamometer. 2. The use of the design product: for testing the grip strength of the hand. 3. The design points of the design product: in its shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. The rear view is the same as the front view, and the right view is the same as the left view.

The utility model discloses a low inertia large torque dynamometer motor with a cushioning structure, which comprises a dynamometer motor, a bearing seat and a mounting plate, the top of the mounting plate is provided with a through groove, the inner wall of the through groove is movably connected with an elastic band, one side of the elastic band is sewed with a hook-and-loop fastener with a thorn surface, and the other side of the elastic band is sewed with the bearing seat. A hair-side hook-and-loop fastener is sewn to one end of the elastic band, a connecting ring is movably connected to the outer wall of the elastic band, a resistance band is fixedly connected to one side of the connecting ring, a bottom plate is fixedly connected to one end of the elastic band, and a buffer pad, a damper and a buffer spring are fixedly connected to the top of the bottom plate. The resistance belt is installed on the dynamometer motor through the elastic belt, a certain resistance buffering effect can be achieved during shaking, the damping effect can be achieved when shaking is generated during overall work through the installed damper and the installed buffering spring, the situation that parts are loosened due to the fact that the whole dynamometer motor shakes too much is avoided, and the reliability of the dynamometer motor is improved. The device solves the problem of easy shaking in the current working process.

The invention discloses an indicator valve, an engine car blowing system and a control method of the engine car blowing system, and belongs to the technical field of engines, the indicator valve comprises a shell provided with an air inlet, an air outlet and an airflow channel, and a step surface is formed on the inner wall of the airflow channel; the valve element is arranged in the shell in a sliding mode, a containing cavity is defined by the valve element and the shell, the containing cavity communicates with the air inlet and the airflow channel, and part of the valve element is embedded into the airflow channel; the valve element has a closed state and an open state, and in the closed state, the valve element is configured to be connected with the step face in a sealed mode so as to isolate the air outlet and the airflow channel. The gas inlet is formed in the indicator valve, compressed gas is conveyed into the gas inlet through other gas source devices, the compressed gas can push the valve element upwards, the valve element and the step face which are originally connected in a sealed mode are separated, then the indicator valve can be opened, conveying of the compressed gas is stopped, the indicator valve can be closed, manual opening and closing are not needed, and the working efficiency is improved. And the opening and closing difficulty of the indicator valve on a large engine is reduced.

The invention relates to the technical field of automobile testing, in particular to a method for testing long braking attenuation of an automobile by using an environmental wind tunnel. Comprising the following steps: installing a chassis dynamometer in an environment wind tunnel, and installing data acquisition equipment on a tested vehicle; setting a tested vehicle in the environment wind tunnel, setting environment parameters in the environment wind tunnel as target working condition parameters, and setting a chassis dynamometer as downhill working condition parameters; after the environment state and the dynamometer are stable, the vehicle is controlled to run continuously within the speed precision range required by the speed spectrum through continuous braking, or when the vehicle is controlled to run continuously to a set emergency deceleration point, emergency braking operation is executed, and experimental data are collected synchronously until a preset test ending condition is met; and after filtering and noise reduction, abnormal value elimination and altitude-slope conversion processing are carried out on the acquired experimental data, the performance attenuation law and the emergency efficiency of the braking system are analyzed. According to the technical scheme, the test precision of the long-braking attenuation of the automobile can be improved, and the test cost is reduced.

This invention relates to the field of prime mover calibration, specifically to a control method for a turbine-type hydraulic dynamometer, comprising the following steps: obtaining the optimal opening degree of the inlet valve for all speed segments through segmented speed trial adjustment; obtaining the specific operating condition speed value, speed adjustment range, and automatic adjustment closing value of the drain valve for each operating condition; performing weighted judgment based on the speed monitoring sequence; calculating the linear fitting degree as a correction coefficient, and obtaining the speed deviation and valve position correction amount. This invention matches a dedicated speed adjustment range and initial adjustment value of the drain valve for each preset operating condition, eliminating the need for blind trial and error in the gradient adjustment of the drain valve, enabling rapid adaptation to the operating condition switching requirements of the prime mover, shortening the convergence time of speed control, and improving the dynamometer's response speed to operating condition switching.

This invention relates to a method and system for rapidly calculating the steady-state periodic response of a rigid body flapping rotor, belonging to the field of rotor flapping response calculation technology. It utilizes a rotor region mesh to iteratively calculate the rigid body flapping angle, flapping velocity, and flow field velocity, and then calculates the rotor's aerodynamic forces based on blade element theory. The aerodynamic forces are then used to calculate the rotor momentum source term. This term is added to the momentum source term in the Navier-Stokes equations, and the rotor region mesh is updated. Finally, the aerodynamic forces are used to calculate the Faroe Islands momentum source term. n This invention updates the rotor rigid body flapping response in a loosely coupled manner. It calculates the rotor's steady-state periodic flapping response to the collective pitch control input, longitudinal periodic pitch control input, and lateral periodic pitch control input. By loosely coupling the rotor momentum source term and the rotor rigid body flapping response, this invention comprehensively considers the influence of aerodynamic components on the flow field, effectively improving computational efficiency.

The application discloses a multi-station diesel engine test running system, which is applied to the technical field of diesel engine test running and comprises a test running production line and a test running system. The test running production line comprises a conveying belt, a first station, a plurality of second stations, a controller, a first detection mechanism, a second detection mechanism and a diesel engine. The test running system is arranged in the controller. The first detection mechanism comprises a dynamometer, a plurality of vibration sensors, a plurality of noise sensors and a plurality of cylinder three. The dynamometer drives the diesel engine to idle without combustion in the cold running-in stage. The vibration sensors are used for acquiring vibration amplitudes at different positions of the diesel engine during test running. The noise sensors are used for acquiring sound decibel values at different positions of the diesel engine during test running. The test running system comprises an acquisition module, an analysis module and a warning module. The acquisition module is electrically connected with the first detection mechanism and the second detection mechanism. The application can improve the test running efficiency of the diesel engine.

The invention discloses a distributed electrically-driven automobile angle module multi-working-condition performance test bench in the field of automobile test devices. The test bench comprises a bench bottom plate; the steering assembly is arranged on the rack bottom plate; the road surface assembly achieves vertical rotation inclination through an actuator, and simulation of an inclined road surface is achieved. The dynamometer assembly is also arranged on the bottom plate of the rack and is connected with the wheels through the transmission assembly; the vibration assembly is fixedly arranged on the rack bottom plate and located above the wheels; the spraying assembly is fixedly arranged on the steering assembly; the invention also provides a test method. The electric wheel performance evaluation device has the beneficial effects that by arranging the steering assembly, the road surface assembly, the dynamometer assembly, the vibration assembly and the spraying assembly, various working conditions in the vehicle running process can be simulated, and the electric wheel performance can be evaluated more comprehensively.

This invention relates to the field of marine propulsion device manufacturing, specifically a design method for a fully azimuth-controlled adjustable-pitch ducted propeller. This method extracts the basic parameters of the ship's main engine and existing rudder propeller, and establishes an integrated arrangement scheme to replace the fixed-pitch propeller with an adjustable-pitch propeller while maintaining the original power parameters unchanged. Based on the theoretical diagram of the fixed-pitch ducted propeller, a hydrodynamic calculation program is executed, introducing correction factors for increased shell diameter ratio and slightly reduced disk area ratio, and forcibly lowering the theoretical thrust coefficient by 5%, to obtain the corrected target open-water characteristic curve. The overall rotational characteristics of the fully azimuth-controlled rudder propeller are utilized to provide thrust for reversing and steering, strictly limiting the pitch adjustment authority to adaptability requirements for low-speed navigation and providing maximum drag under multiple operating conditions. A single-crank slider mechanism is configured inside the propeller hub as the core rotor component, and a three-dimensional spatial layout is completed. An electro-hydraulic integrated servo control system, dominated by a PLC and incorporating a dual-pump parallel architecture and a built-in hydraulic lock, is established. This significantly reduces the frequency and physical amplitude of the propeller blade rotation angle.

The present application relates to the technical field of mechanical transmission test, in particular to a passenger car high-speed gearbox performance test method and test bench, which comprises a base plate, a simulation vibration device, a gearbox fixing device, a first loading device, a second loading device, a dynamometer and a backing plate. Before the test, the installation quality of the high-speed gearbox to be tested can be detected to avoid the phenomenon of test result deviation caused by installation problems. At the same time, during the test, the whole vehicle inertia of a micro car, a small car, a medium car and a large car can be simulated, and after simulating the specified vehicle model, the load can be continuously applied to simulate the test of the inclined road, and vibration is applied during the test process, so that the test environment is closer to the real road condition, the accuracy of the test result is improved, the load is applied flexibly, and the test efficiency is higher.

A rotor engine comprehensive bench test system and test method belong to the technical field of engine test. The system contains rotor engine, AC power dynamometer, main control unit and other groups of modules. The dynamometer can realize forward and reverse reversible rotation of the engine. The main control unit is provided with forward and reverse switching and three-stage alarm module. Each component is connected and communicated. Sensors, acquisition modules, analyzers and the main control unit are cooperatively networked. The test method sequentially completes bench building, system inspection, pre-starting verification, lubrication establishment, engine starting, top dead center searching, mechanical loss test, warming, full-range boundary monitoring, hot-state running-in, ECU online calibration and data evaluation. The combustion analyzer can calculate cylinder pressure parameters. ECU modified parameters take effect immediately. Data analysis covers power and economic indicators. The present invention solves the problem that existing benches cannot adapt to rotor engine tests, builds a safe and efficient comprehensive test platform and provides technical support for rotor engine research and development.

The utility model discloses a shock absorber indicator connecting tool which comprises a bottom plate, the left end and the right end of the upper surface of the bottom plate are both fixedly connected with vertical rods, a pressing plate is arranged above the bottom plate, the vertical rods penetrate through the pressing plate, the opposite faces of the pressing plate and the bottom plate are each provided with a set of installing plates, and the installing plates are connected with the vertical rods. A lead screw and a nut are arranged on the surface of each set of mounting plates, rhombic clamps are fixedly connected to the surfaces of the mounting plates, the inner walls of the rhombic clamps make contact with the surface of a shock absorber, and a first mounting shell and a second mounting shell are slidably connected to the surfaces of the two vertical rods correspondingly; a limiting assembly is fixedly connected between the right surface of the first mounting shell and the second mounting shell, and when the tool is used, the end, away from the vertical rod, of the limiting assembly makes contact with the surface of the shock absorber. By means of the structure, the shock absorber replacement convenience is improved, and shock absorbers of different sizes and types can be conveniently fixed.

The invention relates to an automobile seat slide rail horizontal force measuring gauge, which belongs to the field of automobile seat part detection and comprises a workbench, a bottom plate, a horizontal adjusting assembly, a slide rail force measuring assembly, an inserting rod assembly and a lower slide rail fixing seat. The horizontal adjusting assembly comprises a ball head rod and a ball head rod seat; the slide rail force measurement assembly comprises an electric slide rail group, a dynamometer, a ball head pull rod and an insertion rod assembly; the inserting rod assembly comprises a connecting piece, an inserting rod, a lifting adjusting base and an upper sliding rail inserting rod. The ball pull rod passes through the through hole, and the ball-free end of the ball pull rod is hinged with the dynamometer; due to the fact that the horizontal adjusting assembly is connected between the workbench and the bottom plate, it is guaranteed that the bottom plate is in a horizontal state, the inserting rod assembly capable of adjusting the horizontal height is matched, it is guaranteed that the pulling force on the upper sliding rail is in the horizontal direction, and the accuracy of pulling force detection is guaranteed; the electric slide rail group is matched with the dynamometer to replace a worker to pull the upper slide rail by hand, so that the tension is uniform, and the read data is accurate.

The utility model relates to the technical field of dynamometers, in particular to a four-wheel-drive dynamometer with an adjustable front and rear axle distance, which comprises a bottom frame, a fixed table arranged on the upper side of the rear end of the bottom frame, a track arranged on the front side of the fixed table, a movable table arranged on the track, a rear roller group arranged on the upper side of the fixed table, a first transmission wheel coaxially arranged at the left end of the rear roller group, and a second transmission wheel coaxially arranged at the right end of the first transmission wheel. A front roller set is arranged on the upper side of the moving table, a third transmission wheel is arranged at the left end of the front roller set, a fifth transmission wheel and a sixth transmission wheel are arranged on the bottom frame, a first tensioning wheel and a second tensioning wheel are arranged below the third transmission wheel, and the first transmission wheel and the sixth transmission wheel are connected through a first synchronous belt. The fifth transmission wheel and the sixth transmission wheel are connected through a second synchronous belt, the third transmission wheel is sleeved with the middle of the second synchronous belt in a transmission mode, and the portions, located on the front side and the rear side of the third transmission wheel, of the second synchronous belt are attached to the opposite sides of the first tensioning wheel and the second tensioning wheel in a transmission mode respectively.

The utility model relates to vehicle air conditioner compressor detection technical field, concretely relates to a kind of dynamometer function detection safety electrical connection mechanism:Including starting contactor, discharge contactor, high voltage capacitor, discharge resistance, LED pilot lamp, test start button and test stop button, starting contactor and high voltage capacitor are set in high voltage direct-current power supply and the high voltage direct-current bus of measured controller assembly, starting contactor controls power on-off, high voltage capacitor can inhibit the inrush current when contactor action, reduce the impact to measured controller assembly, avoid TVS tube burst, test stop, discharge contactor attraction, discharge through discharge resistance for high voltage capacitor, LED pilot lamp real-time display discharge state, guarantee the safety of operator, measured controller assembly is connected with measured permanent magnet synchronous motor, operating computer communication, ensure that test data accurate acquisition and analysis, improve the security and data accuracy of test process.

The application provides a torque control system, a torsional vibration excitation device and a power control module. The torque control system is used for controlling a torsional vibration excitation device. The torsional vibration excitation device has a transmission shaft and is fixedly connected with a machine shaft of a dynamometer via the transmission shaft. An end of the machine shaft of the dynamometer, which is away from the transmission shaft, is connected with a rotating shaft of a test device. The torque control system comprises a control module and a torque sensor. The power control module comprises the torsional vibration excitation device, the dynamometer and the test device. The torque control system, the torsional vibration excitation device and the power control module provided by the application are used for simulating dynamic torque, combining with the output torque of the dynamometer and outputting to the test device, so as to investigate the performance of the test device.

The utility model discloses a portable force arm dynamic teaching device which comprises a track, a spring dynamometer, a gravity weight, a fixing plate and an installation assembly used for installing the fixing plate, the front end face of the fixing plate is rotatably connected with a leather measuring tape, and the front end face of the leather measuring tape is fixedly connected with a force arm ruler. A force arm display assembly is integrated between the leather measuring tape and the track. According to the application, the magnetic attraction base is matched with the fixing plate, so that the whole device can be flatly placed on a table top, also can be attracted to a blackboard, can obliquely pull the spring dynamometer and change the orientation of the rail, the leather tape can automatically change the size and direction, students can directly observe the whole change process of the force arm and complete reading of the force arm, and the students can conveniently and rapidly read the force arm. The reading is found to be changed through the cable-stayed spring dynamometer, and the distance between the acting point and the fulcrum is not changed, so that the existence of the force arm is realized, and the nature of the force arm is really known.