837 results about "Dynamometer" patented technology

The invention discloses a multi-dimensional aeroelastic calculation method and device based on a nonlinear Euler-Bernoulli beam and a storage medium, and belongs to the technical field of wind turbine aerodynamics, the method comprises the following steps: inputting the stiffness of each section of a blade into a nonlinear Euler-Bernoulli beam equation to obtain a modal-displacement transformation matrix; the rigidity, the weight and the external force of each section of the blade are converted to obtain a generalized rigidity matrix, a generalized mass matrix and a generalized force; starting circulation, substituting into a forced coupling vibration equation, solving modal displacement of each order at the current moment, and inputting into a modal-displacement inverse transformation matrix to obtain blade displacement; the generalized force is substituted into a blade element momentum theoretical formula to solve aerodynamic force at the next moment, the generalized force is updated to obtain updated generalized force, and aerodynamic force at each moment is obtained; and calculating to obtain the multi-dimensional aerobomb. According to the method, the calculation of the blade deformation and the load considers the change of the torsional degree of freedom, and more accurate and more efficient load and deformation calculation can be carried out.

The invention relates to the technical field of vehicle braking control, and discloses a vehicle braking control system based on a high-speed permanent magnet synchronous motor, which comprises a state sensing module, a braking force calculation module, a braking force control module and a braking force control module, the torque distribution module distributes the total braking torque into a predictable regenerative component and a precisely matched friction component, a deterministic regenerative braking force datum line is established, a braking system is converted into stable output control from passive response energy fluctuation, and linear mapping of pedal travel and deceleration is achieved; and meanwhile, by combining road bumping degree perception and model online correction, the output stability is kept under the complex working condition, and the technical problem that energy recovery and control quality in a hybrid braking system are difficult to consider at the same time is solved.

The invention provides a surface roughness monitoring method of an embedded physical prediction model. According to the method, in a model training stage, cutting force signals and three-phase current signals of a main shaft servo motor in the machining process are collected through a dynamometer and a current sensor, the signals are preprocessed and then input into a cutting force calculation module, cutting force under the corresponding current signals is output, and the obtained cutting force is used for calculating a surface roughness theoretical value; and the current signal, a current signal and a processing parameter are input into a surface roughness calculation module, and a surface roughness monitoring model is trained. In the machining stage, the roughness value of the machined surface of the workpiece at the moment is calculated in real time by collecting the three-phase current signals of the main shaft servo motor in the machining process, and it is avoided that sensors such as a vibration sensor or an acoustic emission sensor or a dynamometer are installed in a machine tool in the actual machining stage.

The invention relates to the technical field of electromagnetic compatibility testing, in particular to an electromagnetic compatibility testing device and method for the shaft current of a hub motor, and the device comprises a shielding chamber, a system master controller, a dynamometer, a hub motor tool and a testing system. A dynamometer, a hub motor tool and a test system are arranged in the shielding chamber; the hub motor tool is used for installing and fixing a hub motor to be tested. An output shaft is designed at the rotor end of the hub motor, and the hub motor is connected with the dynamometer through the output shaft. The test system is used for measuring the shaft current of the hub motor; the system master controller is used for controlling the wheel hub motor to operate under various working conditions and collecting shaft current under each working condition; and obtaining an electromagnetic compatibility test result according to the shaft current. The electromagnetic compatibility and reliability of the hub motor and the control system thereof can be improved.

A method of testing a vehicle includes positioning the vehicle on a dynamometer, operating a propulsion system to rotate drive wheels at a one or more predetermined speeds while actively adjusting a rotational position of a steering wheel to maintain straight vehicle travel on the dynamometer, measuring angle data of the steering wheel during the active adjusting of the rotational position of the steering wheel, checking the measured angle data to determine if it is outside a predetermined angular range, and outputting, in response to the angle data being outside the predetermined angular range, at least one of a repair ticket and a vehicle fault code.

The invention discloses a spiral bevel gear grinding force measuring method and system, electronic equipment and a medium, and the method comprises the steps: obtaining the measuring force in the X, Y and Z directions through a fixed dynamometer, and determining the installation angle of the fixed dynamometer according to the obtained measuring force in the X, Y and Z directions; based on the installation angle, determining a target coordinate transformation matrix between the fixed dynamometer and the gear grinding machine tool cutter shaft; calculating an axial stress component and a radial stress component of the cutter shaft of the gear grinding machine tool according to the measured measuring forces in the X, Y and Z directions and the target coordinate transformation matrix; tool setting between the spiral bevel gear workpiece and the grinding wheel tool is completed based on the axial stress component and the radial stress component; the target relative position of the grinding wheel tool and the gear grinding machine tool workpiece shaft is obtained; and according to the target relative position, the cutting force component of the grinding force and the normal force component of the grinding force are calculated. The precision of grinding force measurement of the spiral bevel gear can be improved.

The invention relates to a transmission shaft bench test device and method, and the device comprises a bumping sliding mechanism which comprises a pedestal, the pedestal is in sliding connection with a sliding platform through a sliding rail, and the pedestal is provided with a first actuator which drives the sliding platform to do reciprocating lifting motion in the length direction of the sliding rail; the side-tipping rotating mechanism comprises a side-tipping platform rotationally connected with the sliding platform through a rotating shaft, and a second actuator for driving the side-tipping platform to rotate around the rotating shaft is connected between the sliding platform and the side-tipping platform; the steering driving mechanism comprises a gearbox fixed on the roll platform, an input shaft of the gearbox is connected with a driving motor through a coupler, an output shaft of the gearbox is connected with a transmission shaft to be tested, and the transmission shaft to be tested is connected with a dynamometer. Performance and endurance tests of the transmission shaft under multiple working conditions can be simulated and detected more truly, and objectivity and accuracy of detection of the detected transmission shaft are improved.

According to the engine emission digital design system and method based on the virtual whole vehicle, the engine, the temperature control loop, the dynamometer and the emission analysis module are arranged on the bench subsystem, multiple circulation working conditions are pre-stored through the circulation working condition model in the control subsystem, and the main control model calls the target circulation working condition according to the design requirement; the driving control model simulates a vehicle driving state; obtaining a road resistance curve through a road resistance model; the engine compartment temperature control model controls the temperature control loop to realize temperature control; the engine working condition model controls the engine to work under the target engine working condition; the emission analysis module receives emission of an engine and analyzes emission components, and the master control model receives the emission components and judges whether the current emission of the engine reaches the standard or not. According to the scheme, engine emission design development under the condition that no physical whole vehicle exists can be achieved, the whole vehicle development period is greatly shortened, the development efficiency is improved, and the development cost is saved.

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 discloses a B-axis power knife rest comprehensive performance test bench and method. The B-axis power knife rest comprehensive performance test bench comprises a base, a B-axis power knife rest, a simulation knife handle assembly, a knife rest mounting seat, an axial displacement table, a dynamometer assembly, an axial force loading assembly, a radial force loading assembly, a deformation measurement assembly, a temperature measurement assembly, a control system and a data acquisition system. The B-axis power tool rest is fixedly connected to the base through the tool rest installation base, the simulation tool handle is installed on the B-axis power tool rest, the axial displacement table is installed on the base, the power measuring assembly and the axial force loading assembly are coaxially combined and installed and then fixedly connected to an axial displacement table moving plate, and the radial force loading assembly and the deformation measuring assembly are installed on an axial displacement table fixing plate. The testing device is simple and compact in structure, large in loading force range and capable of supporting performance testing of B-axis power tool rests of various models, various stations and under multi-dimensional force loading; the test method is simple.

The present invention relates to a thrust and torque measuring device for a model test of a ship. The purpose of the present invention is to provide a self-propelled dynamometer in the prior art in which a thrush and a torque generated on a single rotating shaft connected to a propeller are measured at the same time, resulting in an interference effect occurring between the thrush and the torque, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time. A thrust bearing for rotating while transmitting thrust applied to a shaft to a force cell and a coupling for determining whether or not the alignment state between shafts is abnormal are disposed between the force cell for thrust measurement and the force cell for torque measurement. The interference amount between thrust and torque data is corrected through a data processing board, and whether the shaft alignment state is abnormal or not is judged, so that the interference amount generated when thrust and torque are measured is corrected in a data post-processing mode, and the influence caused by the interference effect is reduced to the maximum extent. Therefore, the thrust and torque measuring device for ship model testing using data post-processing can improve the accuracy and precision of simultaneous measurement of thrust and torque.

The invention provides a vehicle simulation test device and a vehicle simulation test method. The device comprises a first base, a second base and four dynamometers, the dynamometer comprises a lifting assembly, and a steering assembly, a roll assembly and a roller assembly which are arranged on the lifting assembly. The lifting assembly is used for lifting the steering assembly, the steering assembly is used for rotating the roll assembly, and the roll assembly is used for the roll roller assembly. Through the lifting assemblies which are arranged on the left side and the right side of the tested vehicle and have different heights and the side inclination angles of the side inclination assemblies which are adaptively adjusted according to the angles of the lifting assemblies on the left side and the right side of the tested vehicle, the driving conditions of the vehicle at the transverse gradient and wheel side inclination are simulated. Through the lifting assemblies which are arranged at the front end and the rear end of the tested vehicle and have different heights, the driving condition of the vehicle at the longitudinal slope is simulated; the roller assembly is driven through the steering assembly, and the driving condition of vehicle steering is simulated.

The utility model relates to the field of material testing, in particular to a diaphragm tensile air permeability testing system. Comprising a stretching pre-tightening device and an air permeability testing device, the stretching pre-tightening device comprises a fixed clamp, a movable clamp, a dynamometer and a transmission mechanism, the fixed clamp and the movable clamp are oppositely arranged, the air permeability testing device is located between the fixed clamp and the movable clamp, the measuring end of the dynamometer is connected with the fixed clamp through a sample, and the transmission mechanism is connected with a body of the dynamometer. According to the utility model, the diaphragm can be subjected to air permeability test in a stretching state, and the air permeability is accurately measured and evaluated.

The invention discloses a composite board bonding strength detection device and detection method, and relates to the technical field of bonding strength detection. Comprising a base and a rack fixedly connected to the upper end of the base, first sliding grooves are formed in the inner side of the rack, a cross beam is fixedly connected between the first sliding grooves, a dynamometer is fixedly connected to the lower end of the cross beam, connecting bases are fixedly connected to the lower end of the dynamometer and the upper end of the base, and clamps are arranged at the ends, close to each other, of the connecting bases; the first-stage braking assembly is arranged in the first sliding groove, located between the upper end of the cross beam and the top of the rack and used for counteracting movement inertia of the cross beam; when instantaneous force is applied to the non-Newtonian fluid through the piston disc, the non-Newtonian fluid is rapidly gathered to form a rigid structure to improve the hardness, so that the displacement of the piston disc is prevented, the cross beam is prevented from continuously displacing when being subjected to inertia, the position fluctuation of the cross beam caused by inertia is reduced, the occurrence probability of overshoot reading and return stroke reading is reduced, and the accuracy of measurement is improved. And the accuracy of detection data is improved.

The utility model discloses a force measuring mechanism, a force measuring device and an elastic member preload pressure adjustment device, wherein the force measuring mechanism includes a dynamometer, a connecting rod, a connecting seat and a connecting ball, and is connected to the dynamometer by setting a measuring assembly with a connecting ball. When contacting a part to be tested with a hollow cavity for force measurement, the connecting ball can be partially embedded in the hollow cavity and in line contact with the circumferential cavity wall of the hollow cavity, and the overall circumferential force of the part to be tested can be well transmitted to the connecting rod and then to the dynamometer through the connecting ball, so that the pressure value obtained is more accurate and the measurement accuracy is improved. The adjustment device can further drive the mounting part to rotate so that the position of the adjustment part on the mounting part is adjusted, thereby adjusting the preload pressure of the elastic member.

The invention discloses a clutch torque transmission characteristic dynamic test method, and relates to the field of clutch control, and the method comprises the steps: building a test bench, and separating a clutch, the transmission is put into a direct gear; presetting working condition parameters, wherein the working condition parameters comprise an output dynamometer target rotating speed N, an input dynamometer target rotating speed N and a clutch actuator target initial position P; obtaining a preset target torque loading strategy; according to the preset target torque loading strategy, the current position of a clutch actuator is controlled, a clutch friction pair is made to move relatively, and meanwhile test data are collected; acquiring a preset temperature threshold value; according to the test data, whether the clutch reaches a preset temperature threshold value or not is judged; if not, continuing to execute the preset target torque loading strategy; if yes, acquiring a target test position, and generating test data of the target test position; and preprocessing the test data according to the target test position test data, and generating an all-position test result.

The invention provides a multi-motor cooperative control system based on an open-source real-time operating system, and relates to the technical field of multi-motor control, the system calculates a target rotating speed through an upper computer controller, and ensures that a rotating speed instruction can be simultaneously sent to a plurality of dynamometers by using a real-time controller. By means of the EtherCAT high-speed communication protocol, the system can synchronously transmit instructions with extremely low delay, and it is guaranteed that all the drivers receive and execute the same operation instructions at the same moment. In addition, by setting consistent acceleration and deceleration time and PI control parameters of a speed loop and a current loop in the driver, the synchronism and response performance of the system are further optimized. The invention aims to realize high-precision synchronous operation.

A portable on-vehicle dynamometer comprises a containment chassis (2), a drum (3) rotatably housed in said containment chassis (2) to rotate around a load shaft (4), mechanical transmission means (5) adapted to connect said load shaft (4) to the hub of a wheel of the vehicle being measured to transfer the motion of the vehicle engine to said drum (3), wherein said mechanical transmission means (5) comprise a connection flange (6) provided with a central axis of rotation and suitable to be fixed stably but removably to the hub of the vehicle wheel, wherein said mechanical transmission means (5) further comprise a CV joint (7) adapted to connect said flange (6) with one end of said load shaft (4) and designed to allow mutual angular regulation between said load shaft (4) and the central rotation axis of said flange (6) with respect to at least one inclination plane.

The utility model discloses a stainless steel bar fixed-length cutting device, which relates to the technical field of cutting and comprises a lifting plate. A driving wheel is connected to a mounted bearing of the lifting plate in a matched mode, a rotating shaft of the driving wheel is connected with a second driving motor in a matched mode, and then a meter is arranged on one side of the driving wheel and fixed to the lifting plate through a bolt. A bearing frame is arranged on one side of the lifting plate, the bearing frame is arranged in a V shape, and a rotating roller is arranged on the inner side of the bearing frame; a laser cutting machine is arranged above the lifting plate; according to the laser cutting machine, the driving shaft of the second driving motor drives the transmission wheel to rotate, so that power is provided for a to-be-cut bar, the meter can meter the length and cut in a fixed-length mode, the bearing frame plays a role in bearing, the to-be-cut bar can be driven to rotate under rotation of the rotating roller, and circumferential cutting of the laser cutting machine is facilitated.

The invention relates to the technical field of suction cup testing, and discloses a ceramic suction cup suction testing device which comprises a suction cup, a testing piece, a testing box, a testing assembly, a reset assembly, a material changing assembly and a vacuum pump. The test assembly comprises a push-pull dynamometer and a power assembly, and the power assembly is used for driving the push-pull dynamometer to apply thrust to the test piece; the reset assembly comprises a reset plate, a first air cylinder, a guide plate and two limiting plates, the top of the guide plate is flush with the top of the suction cup, and a first sliding way is defined between the two limiting plates so as to guide the test piece; the material changing assembly comprises a discharging groove, a feeding cylinder and a discharging plate, the discharging groove is used for receiving the test piece, the top of the feeding cylinder is communicated with the outside of the test box, a discharging hole communicated with the discharging plate is formed in the bottom of the feeding cylinder, and the discharging plate is communicated with the first sliding way. The test piece can be pushed back to the suction cup again, the suction force of the suction cup can be repeatedly tested, the damaged test piece can be replaced, and the test accuracy can be improved.

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 provides a hydraulic dynamometer rotor assembly assembling precision correction tool which comprises a free end supporting structure used for supporting the free end of a hydraulic dynamometer rotor assembly, and the top of the free end supporting structure fixedly supports a free end bearing seat. The fixed end supporting structure is used for supporting the fixed end of the hydraulic dynamometer rotor assembly, and the top of the fixed end supporting structure fixedly supports the fixed end bearing seat; the hydraulic dynamometer rotor assembly is rotatably installed between the free end bearing seat and the fixed end bearing seat. The free end supporting structure and the fixed end supporting structure are fixedly installed on the top of a machine tool workbench through pressing plate bolt assemblies. The free end supporting structure, the fixed end supporting structure and the hydraulic dynamometer rotor assembly are coaxially arranged and installed. The rotor assembly can be horizontally installed on a machine tool workbench in a rotation axis mode, and therefore the purposes of rotating the rotor assembly and machining and correcting the outer circles and the end faces of couplings at the two ends of the rotor assembly are achieved.

The invention discloses an electric drive system assembly efficiency test method based on temperature control, and the method comprises the following steps: setting a test target working condition matrix of an electric drive assembly, and obtaining the no-load mechanical power at each rotating speed point; setting a test target working condition matrix of the electric drive assembly; preheating an electric drive assembly, and raising the temperature of a motor stator, the temperature of lubricating oil and the temperature of a motor rotor to specified values; respectively adjusting the output rotating speed of the load dynamometer and the output torque of the electric drive assembly to the target rotating speed and the target torque of each working condition point in the target working condition matrix; the motor stator temperature, the lubricating oil temperature and the motor rotor temperature after each target working condition point are judged; and then the electric power, the mechanical power and the electric drive assembly efficiency of the electric drive assembly located at each working condition point are obtained. The problem that various temperature parameters cannot be accurately and flexibly controlled in an existing electric drive assembly efficiency test can be solved.

A power distribution network toughness improving method considering diesel engine electric power measuring system access comprises the steps that after modeling is conducted according to output characteristics of an electric energy feedback part in a diesel engine electric power measuring system, the supporting capacity of the diesel engine electric power measuring system serving as a distributed flexible resource is quantified from the equipment angle; constructing an optimal dispatching model of the diesel engine electric power dynamometer system oriented to the toughness improvement of the power distribution network; and quantifying the influence degree of grid connection of the diesel engine electric power measuring system on the toughness of the power distribution network according to the toughness evaluation index, establishing an optimal dispatching model of the diesel engine electric power measuring system by taking toughness improvement as a target, and solving through a mixed integer programming method to obtain an optimal configuration strategy of the diesel engine electric power measuring system as distributed energy. According to the method, support is provided for the operation of the power distribution network in a disaster scene through the access of the diesel engine electric power measurement system, the load shedding rate is reduced, the overall operation stability degree is improved, and the influence of the method on the post-disaster recovery capability of the power distribution network is evaluated through the toughness evaluation index.

The present application discloses a rolling force dynamometer device with preset force, the dynamometer device comprising: a dynamometer box, comprising a main body and an extension part; an upper pressure equalizing plate comprising a first pressure part and a first abutment part; the dynamometer comprises an upper surface and a lower surface, the upper surface contacts the bottom surface of the upper pressure equalizing plate; the lower pressure equalizing plate comprises a second pressure part and a second abutment part, the second pressure part is located below the dynamometer, and the second abutment part is located below the main body; a fastening assembly comprises a fastener and a disc spring group, each disc spring group is sleeved on the outside of the fastener, and during the switching of the lower pressure equalizing plate between the first preset state and the second preset state, the fastening assembly is configured to control the preset force of the dynamometer by controlling the height movement distance of the fastening assembly relative to the lower pressure equalizing plate, so that the height movement distance of the fastener can be calculated according to the target required preset force, which can save construction time and ensure the accuracy and stability of the dynamometer.

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 present invention relates to the technical field of ultrasonic surface strengthening. Provided are a test device and test method for a track interference behavior in ultrasonic impact strengthening. The device comprises an object table, an X-Y-Z-axis motion control module and a workpiece rotation motion module being provided on the object table, and the workpiece rotation motion module being suitable for clamping a workpiece and driving the workpiece to rotate. The X-Y-Z-axis motion control module is connected to an ultrasonic impact strengthening execution module, an extending end of an air cylinder is connected to an ultrasonic transducer, and a booster is connected to the ultrasonic transducer so as to convert an input electric power into a mechanical power and enable same to act on the booster. A rolling head is connected to the tail end of the booster. A dynamometer is provided between the ultrasonic transducer and the booster for measuring a static pressure acting on the workpiece in real time, and feeding the static pressure back to a control system, such that the rolling head keeps a constant static pressure on the workpiece. The solution can improve the strengthening effect on surfaces of parts.

The invention relates to an electric drive system efficiency test compensation method, a storage medium and a program product, and relates to the technical field of new energy automobiles. The method is executed by a rack control system, and comprises the following steps: acquiring mechanical friction torque and friction mechanical power when a dynamometer idles; collecting the line resistance of a direct current bus between a power battery of the vehicle and a motor controller and the line resistance of a three-phase end line between a motor of the vehicle and the motor controller before the efficiency test; relevant parameters in the efficiency testing process are collected, wherein the relevant parameters comprise direct-current bus current, direct-current bus power, U-phase current, V-phase current, W-phase current, three-phase electric power, dynamometer rotating speed, dynamometer actual measurement torque and dynamometer mechanical power; according to the friction mechanical power, the line resistance of the direct current bus, the line resistance of the three-phase end line and related parameters, the efficiency compensation of the electric driving system is calculated, so that the accuracy of the efficiency test compensation calculation of the electric driving system is improved.

The control method of a hydraulic dynamometer with segmented and graded levels belongs to the technical field of prime mover calibration technology. In order to solve the problems of poor adjustment ability and high debugging risk of the existing hydraulic dynamometer control strategy, it includes: using the water inlet valve opening curve to perform closed-loop control on the water inlet valve, and using the "speed-torque" segmented curve with different segmented slopes to perform closed-loop control on the drain valve. The specific method of using the "speed-torque" segmented curve to perform closed-loop control on the drain valve includes: using the calibration key operating point of the prime mover as the segmentation point, dividing the operation process of the prime mover into several segments; performing "speed-torque" curve fitting on each segmented operation process, and obtaining several segments of curves with different slopes, namely the "speed-torque" segmented curve; according to the slopes of different segmented curves, obtaining the PID parameters of each segment, and performing graded position closed-loop PID control on the drain valve according to the PID parameters. The present invention is used for hydraulic dynamometers.

A new energy automobile driving motor comprehensive test device disclosed by the present invention comprises a test bench and a sliding frame fixedly installed on the upper surface of the test bench, the sliding frame is slidably connected with a transmission mechanism, the transmission mechanism is in engaged connection with a turntable mechanism, and the upper end of the turntable mechanism is fixedly connected with a driving motor. One side of the driving motor is fixedly connected with a pulling mechanism through a mounting frame, the driving motor is connected with a connecting mechanism in an inserted mode through a motor output shaft, the transmission mechanism comprises a sliding table, a transmission rod fixedly installed on the lower surface of the sliding table through a fixing block and a screw connected with the interior of the transmission rod in a meshed mode, and a spiral groove is formed in the outer surface of the transmission rod. The inner wall of the spiral groove is slidably connected with a sliding block. According to the invention, the driving cylinder and the contact strip are combined for use, so that the connection of the driving motor and the dynamometer can be quickly positioned, and the complex step of manual repeated positioning is avoided, thereby achieving the effect of high testing efficiency.