102 results about "Dynamic braking" patented technology

The invention belongs to the field of intelligent vehicle-mounted technology, and particularly relates to a multifunctional vehicle-mounted sensing detection system based on multi-source information fusion, which comprises multi-source information acquisition, high-precision space-time synchronization and heterogeneous data preprocessing. A heterogeneous sensing system with feature level deep fusion, vehicle state dynamic performance evaluation and adaptive decision and risk evaluation capabilities is constructed, and a driving decision is dynamically adjusted through fusion perception and vehicle performance. The vehicle state and dynamic performance evaluation module is constructed by deeply integrating vehicle internal state data acquired by a vehicle-mounted diagnosis system into a perception fusion and decision planning process, and the core contradiction of disjunction of a perception result and a vehicle dynamic performance strategy is effectively solved. The system can evaluate key performance parameters such as power, braking, steering and the like of the vehicle and potential faults of the key performance parameters in real time, and the driving strategy and the safety margin are dynamically adjusted in the self-adaptive decision and risk evaluation module according to the actual physical limitation of the vehicle.

The invention discloses a high-temperature protection control method of a vehicle braking system and a vehicle, belongs to the technical field of vehicle control, and aims to solve the problems that an existing vehicle braking system lacks high-temperature trend prediction capacity and a dynamic braking force adjusting mechanism, heat accumulation is prone to occurring under the high-load working condition, braking performance declines, and the service life is poor. And therefore, the technical problem of insufficient braking stability and safety is solved. The method comprises the following steps: constructing a generative diffusion model; constructing a temperature control trend prediction model; training the temperature control trend prediction model through the high-temperature time sequence and the braking heat data sample set; constructing a multi-target reinforcement learning strategy model; performing multi-model fusion processing on the generative diffusion model, the temperature control trend prediction model and the multi-target reinforcement learning strategy model to obtain a high-temperature protection control system; and inputting the real-time braking heat data of the target vehicle into a high-temperature protection control system to obtain a corresponding control action vector so as to carry out high-temperature protection control on a vehicle braking system.

A variable-frequency drive includes a rectifier, a filter, an inverter, a capacitor bank, and control circuitry. The rectifier converts AC power from a power source to DC power on a DC bus for filtering by the filter. The inverter converts the DC power to three-phase AC power for output to the electric motor. The capacitor bank has one or more capacitors connected to the DC bus. The capacitor bank can store regenerative power on the DC bus from the inverter and can supply the stored DC power to the DC bus for conversion to the three-phase AC power to drive the electric motor. The control circuitry pre-charges the capacitor bank from the AC power of the power source. The control circuitry monitors one or more parameters of the variable-frequency drive and detects one or more fault conditions associated with the one or more monitored parameters.

A locomotive comprises a DC power bus, traction motors, batteries, and a charging source, but has no prime mover engine. Each traction motor includes armature and field windings connected in parallel across the DC power bus. The batteries provide power to the DC power bus when in a motoring mode, and receive power from the DC power bus when in a charging mode and a dynamic braking mode. The charging source is connected across the DC power bus to provide charging power to the batteries when in the charging mode. The traction motors also provide charging power to the batteries when in the dynamic braking mode. The power from the charging source is less than the power that would be provided by a prime mover engine. The charging source provides no power to the traction motors when in the charging mode.

The invention discloses an intelligent vehicle emergency obstacle avoidance braking control method and system, and relates to the technical field of automatic driving, and the method comprises the steps: obtaining historical vehicle driving data and historical vehicle user monitoring data, constructing a driving behavior analysis model, and evaluating the vehicle driving user reaction capability under collision early warning; obtaining a plurality of historical emergency obstacle avoidance brake control triggering scene big data and the collision early warning response capability of a vehicle driving user, constructing a personalized dynamic brake redundant space evaluation model, and generating a collision early warning response personalized redundant space of the vehicle driving user; real-time vehicle surrounding environment data are obtained, collision early warning response personalized redundant space of a vehicle driving user is used as a radius, a vehicle road environment collaborative risk field function is established, a vehicle traveling dynamic risk field is output, a vehicle emergency obstacle avoidance brake control mechanism is established, and a decision of a dynamic virtual hoist rope is generated. The method has the beneficial effects that the strong robustness for dealing with uncertainty is considered, and the risk avoiding success rate is remarkably improved.

The invention relates to a method for active dynamic braking of an elevator system (100). The method includes detecting (310) a dynamic braking condition, acquiring (320) speed data representative of a speed of the elevator car (102), and activating (340) an active dynamic braking operation for dynamically braking movement of the elevator car if the acquired speed data indicates (330) that the speed of the elevator car reaches a predetermined monitored speed level. The active dynamic braking operation includes operating a motor inverter of an elevator drive unit of an elevator system by switching a high-voltage side switch and a low-voltage side switch of the motor inverter in a controlled manner such that a rotating field is generated in a stator winding of a traction motor, therefore, the rotation of the traction motor is dynamically braked, and the movement of the elevator car is braked. The invention also relates to an elevator drive unit, an elevator system, a computer program and a computer readable storage medium.

The invention discloses a braking energy recovery self-adaptive control system based on a multi-agent cooperative game. The braking energy recovery self-adaptive control system comprises a human-vehicle-road comprehensive information acquisition module, a braking mode judgment module, a target braking force calculation module and a braking mode smooth transition module. The human-vehicle-road comprehensive information acquisition module acquires driver information, vehicle information and road environment information in real time; the braking mode judgment module calculates a braking energy recovery tendency characterization coefficient and compares the braking energy recovery tendency characterization coefficient with a threshold value, and whether a braking energy recovery mode is started or not is judged in a self-adaptive mode; the target braking force calculation module divides the braking system into a plurality of independent intelligent agents according to axles, and the motor braking force and the friction braking force of all the intelligent agents are distributed in a collaborative optimization mode through a multi-agent cooperative game algorithm; the braking mode smooth transition module adopts a smooth transition function to dynamically adjust the proportion of the motor braking force to the friction braking force, and smooth transition between the two braking force sources is achieved.

The invention provides a dynamic braking element arrangement and control device for preventing a cruise vehicle from rolling, and relates to the technical field of vehicle braking control systems. The problems that in the prior art, when the complex overturning risk of a high-gravity-center vehicle is dealt with, risk sources cannot be distinguished, and control strategy switching is rigid are comprehensively solved. According to the method, the identification precision and response speed of the control system to overturning risks of different sources are improved, and the smoothness and precision of the control process are improved on the premise of ensuring the limit safety, so that the overall robustness and adaptability of the system in a complex and dynamic change scene are enhanced.

The invention discloses a rail transit train longitudinal dynamic modeling traction and dynamic braking force calculation method, which comprises the following steps of: 1, acquiring the acceleration of a train, and calculating the sum of external forces borne by the train; 2, calculating the running resistance borne by the train; 3, air braking force borne by the train is calculated; 4, calculating the total traction force and the dynamic braking force of the train; and 5, distributing the total traction force and the dynamic braking force of the train to a specific vehicle. The method has the advantages that the method does not depend on acquisition of a locomotive performance curve any more, complexity and difficulty of locomotive control characteristic modeling in an existing method are simplified, accurate calculation and distribution of train traction and dynamic braking force can be achieved, and construction of a rail transit train longitudinal dynamic model is effectively supported.

The invention relates to a method for detecting a leak in a power brake system (10) of a motor veihcle. In order to generate a brake pressure (pB), the power brake system (10) comprises a power brake cylinder (66) with a brake piston (74). The method comprises the step of continuously determining (A) a volume-pressure value (p(V)) on the basis of a measured brake pressure (pB) and a brake fluid volume (VFZ) which is displaced from the power brake cylinder (66), during a braking operation (Br). In the event that the volume-pressure value (p(V)) exceeds a specified volume-pressure limit value (pG(V)), the following steps are carried out: summing (B) a tolerated and time- and pressure-dependent brake fluid loss (VB) from the start of the braking operation (Br) until a first refilling process (N1) of the power brake cylinder (66) and before at least one further refilling process (Nn); determining (C) a brake fluid volume (ΔVN) received during each refilling process (N1, Nn); reducing (D) the brake fluid loss (VB) by the brake fluid volume (ΔVN) received during the refilling process (N1, Nn); and determining (E) an error if the brake fluid loss (VB) calculated in this way lies below a volume limit value (VG) before a refilling process (N1, Nn).

The invention aims to provide a V2V-based AEB control device and method, and the device comprises a V2V-based AEB control device which comprises a V2V data communication module, a real-time data collection module, a data analysis module, a dynamic braking module, and a voice prompt module. The V2V data communication module is used for carrying out information intercommunication with nearby vehicles and transmitting the information to the data analysis module in real time; the real-time data acquisition module is used for acquiring the speed of the vehicle, the distance between the vehicle and the influence factor and the road condition image, and transmitting to the data analysis module in real time; the data analysis module is used for analyzing the currently acquired image and the vehicle sharing information and outputting a decision strategy to the dynamic braking module; and the dynamic braking module is used for controlling a vehicle braking system to reduce the current vehicle speed to a passing speed suitable for passing through the influence factors according to the received decision strategy, and reminding a driver by voice. According to the invention, road and environment influence factors in the vehicle driving environment can be detected and evaluated in real time, and dynamic control of the vehicle is realized through intelligent decision.

The embodiment of the invention provides a vehicle braking control method and device, electronic equipment and a storage medium. In response to a dynamic braking condition, the wheel deceleration, the wheel deceleration threshold value and the target braking parameter of a vehicle in the braking process are obtained; the target braking parameters comprise the target slip rate, the target wheel deceleration and the target braking time; determining a high attachment side of the vehicle according to the wheel deceleration and the wheel deceleration threshold; the high attachment side corresponds to parking force; acquiring an initial braking parameter corresponding to the high attachment side; the initial braking parameters comprise the initial slip rate and the initial braking time; and according to the wheel deceleration, the initial braking parameter and the target braking parameter, the parking force corresponding to the high attachment side is controlled. According to the embodiment of the invention, by identifying the road surface where the vehicle is located, the high attachment side of the vehicle can be rapidly and accurately identified, the parking force of the high attachment side is independently controlled based on multiple parameters such as the wheel deceleration, the slip rate and the braking time, and the stability and efficiency of vehicle braking are improved.

The invention discloses a brake box, a motion control system, a mechanical arm and semiconductor equipment, relates to the field of industrial control, is used for realizing dynamic braking, and provides the brake box aiming at the problem that a motion track cannot be ensured to be not deviated during dynamic braking at present. The bleeder circuit in the brake box is connected with three phases of the motor, so that electric energy generated by power generation of the motor can be consumed, and the brake requirement is met. In addition, in the brake box, whether each phase in the three phases of the motor can consume electric energy through the bleeder circuit or not is controlled through the first switch. Furthermore, the current of each phase is detected through a current detection circuit, and the current of each phase of the motor is controlled to be close to a corresponding target current value, thereby ensuring that the motion track of the load driven by the motor does not deviate from the original track. Moreover, the brake box is independent of the motor driver, so that even if the motor driver breaks down, the brake control of the brake box on the motor is not influenced.

The invention relates to a method for active dynamic braking of an elevator system. The method comprising: detecting a dynamic braking situation, obtaining speed data representing a speed of an elevator car, and activating an active dynamic braking operation for dynamically braking the movement of the elevator car, if the obtained speed data indicates that the speed of the elevator car reaches a predetermined monitoring speed level. The active dynamic braking operation comprises operating a motor inverter of an elevator drive unit of the elevator system by switching high-side switches and low-side switches of the motor inverter in a controlled manner so that a rotating field is generated in stator windings of a hoisting motor for dynamically braking the rotation of the hoisting motor and thus the movement of the elevator car. The invention relates also to an elevator drive unit, an elevator system, a computer program, and a computer-readable storage medium.

The application discloses a kind of intelligent vehicle emergency obstacle avoidance brake control method and system, it is related to automatic driving technical field, including: obtaining historical vehicle driving data and historical vehicle user monitoring data, constructs driving behavior analysis model, assesses the reaction ability of vehicle driving user under collision warning;Obtain historical emergency obstacle avoidance brake control trigger scene big data and the collision warning reaction ability of vehicle driving user, construct personalized dynamic braking redundancy space evaluation model, generate the collision warning reaction personalized redundancy space of vehicle driving user;Real-time vehicle surrounding environment data is acquired, with the collision warning reaction personalized redundancy space of vehicle driving user as radius, establish car-road environment collaborative risk field function, output vehicle travel dynamic risk field, establish vehicle emergency obstacle avoidance brake control mechanism, generate the decision of dynamic virtual tow rope.The beneficial effects of the application are: strong robustness is considered to deal with uncertainty, significantly improve the success rate of risk avoidance.

The present examples provide systems and methods for performing hydraulic braking in a vehicle. A system includes a set of hydraulically controlled brakes, a set of valves coupled with the set of brakes and configured to regulate hydraulic pressure applied to the brakes, a first hydraulic system (including a primary hydraulic pressure generator and a first controller), and a second hydraulic system (including a backup hydraulic pressure generator and a second controller). The first controller is configured to receive sensor data. Based on sensor data, the first controller determines a magnitude of hydraulic pressure applied to each hydraulic control brake, sends a pressure command to the main hydraulic pressure generator to generate hydraulic pressure, and sends a valve control command to the second controller using a high-speed communication connection.

A dynamic braking system for an electrified vehicle having a high voltage (HV) battery system and an electric propulsion system includes a regenerative braking system configured to recharge the HV battery system, a vehicle controller configured to monitor and control the regenerative braking system to selectively perform a regenerative braking operation, and a vehicle brake actuator configured to selectively actuate one or more vehicle friction brakes. A brake controller is in signal communication with the vehicle brake actuator and configured for signal communication with a trailer brake actuator to selectively actuate trailer friction brakes. The brake controller is programmed to receive a driver braking request, receive a signal indicating a regenerative braking capacity of the electric propulsion system, and based on the driver braking request and the regenerative braking capacity, automatically adjust a trailer brake gain to (i) maximize energy recovery via regenerative braking and (ii) reduce brake wear.

To provide an electromechanical brake capable of miniaturizing a brake device.SOLUTION: A planetary roller screw 10 including a shaft 20 having a shaft-side thread portion 21, a roller 30 having a roller-side thread portion 31 that meshes with the shaft-side thread portion 21, a piston 50 in which the shaft 20 and the roller 30 are disposed, a cage 40 that supports the roller 30, and a thrust bearing 60 that transmits a load in an axial direction between the roller 30 and the piston 50; The roller 30 moves in the axial direction when the rotation of the shaft 20 is transmitted, and the piston 50 moves in the axial direction when the movement of the roller 30 is transmitted, and applies a pressing force in a direction in which the brake pad 88 is pressed against the brake rotor 90 to the brake pad 88.SELECTED DRAWING: Figure 2

The invention relates to a method for preparing an electric-assisted braking system (10) for anticipated degradation. The method comprises the steps of detecting (B) an abnormal state value (Z) of at least one component necessary for electric-assisted braking, and evaluating (C) a probability of failure (W). A ) of the external power braking system (10) during braking, and of adapting (D) a brake pedal travel-brake pressure curve or brake pedal travel-deceleration curve according to the probability of failure (W A), so that a shorter brake pedal travel is required for the same brake pressure or deceleration. In a further step, the external power braking system (10) is activated (E) so that braking is carried out with a brake fluid volume provided by a change in brake pedal travel initiated by the driver, should a failure of at least one component necessary for braking be detected during braking.

An intelligent driving sensing data evaluation system, comprising a wet and slippery bridge deck real-time monitoring module, a wet and slippery bridge deck sensing information processing module, a grip evaluation model construction module, a dynamic braking strategy adjustment module, and a feedback optimization and model update module. The wet and slippery bridge deck sensing information processing module is configured to acquire, in real time, wet and slippery bridge deck sensing information when a vehicle is moving at a high speed on a surface of a wet and slippery bridge, and analyze the acquired information to generate a wet and slippery bridge deck friction coefficient and a grip response hysteresis index respectively. The grip evaluation model construction module is configured to construct a grip evaluation model for the generated wet-slip bridge deck friction coefficient and grip response hysteresis index, generate a grip evaluation coefficient, and analyze the generated grip evaluation coefficient.

The application provides an electric traction device of an inclined track transport vehicle and the inclined track transport vehicle, and belongs to the technical field of railway tunnel engineering equipment. The device comprises: a main frame; a friction wheel for contacting a driving track and generating a driving force; a brake arm; wherein when a brake oil cylinder is compressed, the friction wheel is pushed to press the driving track to generate the driving force, the brake arm drives a brake block to separate from the driving track to release the brake; when the brake oil cylinder is extended, the brake arm is pushed to rotate around a middle hinge point to drive a driving end of a driving frame to move away from the driving track and pull the friction wheel to separate from the driving track, and the brake arm drives the brake block to press the driving track to brake. Through the linkage mechanism of the brake arm and the driving frame driven by a single brake oil cylinder, the mechanical interlocking function of "releasing the brake to automatically press the friction wheel to drive and braking to automatically separate from the friction wheel to stop" is realized, which simplifies the structure and improves the safety of the inclined track transport.

The present invention relates to a method for operating an external power braking system (2) comprising a braking device (12) to which a primary and a secondary actuating device (14, 16) for generating a hydraulic brake pressure are assigned, which are designed to receive a brake request signal (18, 20) representative of a braking request electronically, comprising the method steps of acquiring information on the functionality of the primary actuating device (14) by the secondary actuating device (16) in a first acquisition mode by means of electronic communication (26) between the primary and the secondary actuating device (14, 16) and acquiring the information on the functionality of the primary actuating device (14) in a second acquisition mode by determining a hydraulic brake pressure generated by the primary actuating device (14) by the secondary actuating device (16).if no information on the functionality of the primary actuating device (14) can be acquired by the secondary actuating device (16) in the first detection mode. Furthermore, the invention relates to an external power braking system (2) and a motor vehicle (4) with such an external power braking system (2).

This application discloses an automatic control method, device, equipment, and storage medium for an automotive brake disc grinding operation, relating to the technical field of automotive testing. The method includes: establishing a communication connection with a controller local area network (CLAN) bus, and acquiring vehicle status parameters and a current cycle count based on the communication connection; controlling the vehicle to perform disc grinding operations based on the vehicle status parameters and at least one of preset drive parameters, braking parameters, and cooling parameters; and controlling the vehicle to return to center steering based on a preset number of disc grinding cycles and the current cycle count, so that the vehicle completes the brake disc grinding. This application, by designing a bus-based automated control process, precisely coordinates and controls the vehicle's power, braking, and steering systems, solving the problems of low control accuracy, poor operational consistency, and unstable efficiency associated with manual disc grinding, thereby improving the control accuracy and efficiency of the disc grinding operation.

The present application relates to magnetic power brake structure and load release device, including piston cylinder; air pressure release structure; magnetic transmission device, which is driven by high pressure gas and moves along the side wall of the piston cylinder, which structure includes the outer magnetic ring group and the inner magnetic ring group with magnetism; brake conductor ring, which is a magnetic conductive structure and is sleeved on the piston cylinder. The present application has compact and reasonable structure, and is convenient to operate. By using high pressure gas as power source, the inner magnetic ring group is driven to work, and the outer magnetic ring group is driven to move in the same direction, so that the purpose of releasing load is achieved by using magnetic force transmission principle. Meanwhile, by designing parameters such as release device exhaust parameter, inner and outer magnetic ring parameter and brake conductor ring parameter, the load release process speed, overload and noise can be effectively controlled. The side pulling type single-stage piston cylinder underwater load release device designed by the present application adopts twice air intake mode, which can greatly release the energy distribution of the process, and significantly reduce the release overload and flow noise.

The invention relates to an electronically slip-controlled power-assisted braking system (10), in particular for a motor vehicle. Known power-assisted braking systems (10) comprise a brake request control device (A), a pressure supply device (B) for providing brake pressure in a connected brake circuit (12) with a contacted wheel brake (14), and a modulation unit (C) for modulating the brake pressure in the wheel brake (14) depending on the prevailing slip conditions at an assigned wheel. A pressure sensor (72) is provided in the brake circuit (12) to detect brake pressure provided by the pressure supply device (B). An electronic control unit (34) detects the signals from the pressure sensor (72) and evaluates them to generate a control signal for an electric motor (54) to drive a pressure generator (56) of the pressure supply device (B).According to the invention, the pressure sensor (72) can be connected alternately to the brake request preselection device (A) or to the brake pressure supply device (B) or the modulation unit (C).

The invention provides a hydraulic coupler performance testing method, and relates to the technical field of hydraulic coupler testing. The method comprises the steps that a test platform is built, and a tested hydraulic coupler is installed through an adaptive tool; starting an input variable frequency motor and setting parameters, and acquiring input end data by a torque rotating speed sensor; the PLC controls the loading variable frequency motor to load through the frequency converter, redundant current is fed back to save energy, and the dynamic braking switching module automatically switches the braking mode; the computer collects multi-dimensional data, generates data after processing and draws a characteristic curve; the method further comprises sealing, vibration and noise testing, construction of a digital twinborn model for virtual-real comparative analysis, and fault identification and early warning based on an AI fault diagnosis model. According to the invention, the test precision and the intelligent degree are improved, the energy consumption is reduced, error positioning is facilitated, the functions are comprehensive, and the device is suitable for performance tests of different types of hydraulic couplers.

The invention provides a method and device for determining the braking force of a vehicle, the vehicle and a storage medium, the method is applied to the technical field of trailer control, and the method comprises the steps that under the condition that a target vehicle is in a trailer stage, if it is detected that a tractor brakes, the first braking force of the tractor is obtained; second braking force of the pulled vehicle is determined according to the first braking force and actual influence parameters of the pulled vehicle, and when the pulled vehicle is braked with the second braking force, synchronous braking of the pulled vehicle and the pulled vehicle can be kept; and based on the second braking force, the pulled vehicle is controlled to be braked. According to the method, when braking is needed in the trailer operation period, the braking force of the towed vehicle during synchronous braking of the two vehicles can be determined by combining the influence factors of braking of the current towed vehicle and the braking force of the tractor, so that the braking process of the towed vehicle in the trailer process is more accurate, and the risk of rear-end collision of the towed vehicle is effectively avoided; and the safety in the trailer process is improved.

The application discloses an EPB dynamic braking control method, device, equipment, medium and vehicle, wherein the method comprises the following steps: judging whether the vehicle enters an EPB dynamic braking process, if the vehicle enters the EPB dynamic braking process, controlling an EPB motor to stop entering an EPB initial maintaining stage; acquiring a vehicle speed value and a wheel speed value; outputting a braking control signal according to the vehicle speed value and the wheel speed value, the braking control signal being a clamping enable signal or a release enable signal; if the clamping enable signal is outputted, controlling an EPB caliper to execute a clamping cycle process; if the clamping enable signal is continuously outputted, counting the number of times of continuously executing the clamping cycle process on the EPB caliper; if the count is greater than a preset count and the clamping enable signal is still outputted, controlling the EPB caliper to stop executing the clamping cycle process; and until the release enable signal is outputted at least once, the count is cleared, and the starting step is returned. In this way, it is favorable to prevent clamping overexertion, caliper damage and driving danger.

The hydraulic double-damping control device comprises upper damping mechanisms and lower damping mechanisms, an upper conveying belt of the belt conveyor is located above the multiple upper damping mechanisms, and a lower conveying belt of the belt conveyor passes through the space between lower damping rollers and upper damping rollers of the multiple lower damping mechanisms. The upper damping mechanism comprises four oil cylinder bases installed on the top side of a rack of the belt conveyor, first oil cylinders are installed in the oil cylinder bases, the telescopic ends of the first oil cylinders are connected with square pipes, a groove-shaped frame arranged in a V shape is installed between the two square pipes, and a buffer plate is installed on the groove-shaped frame. According to the hydraulic double-damping control device, dynamic braking and speed control over an upper conveying belt and a lower conveying belt of the belt conveyor are achieved through the synergistic effect of the upper damping mechanism and the lower damping mechanism, the upper damping mechanism rubs the upper conveying belt through a buffer plate, the lower damping mechanism clamps the lower conveying belt through double rollers, double braking redundancy is formed, and the braking reliability is greatly improved.

The invention discloses a performance testing device and method for a friction type brake lock shaft device, and relates to the technical field of mechanical transmission system testing. The problem that in the prior art, dynamic brake performance testing and static lock shaft performance testing cannot be completed on the same testing device in an integrated mode is solved. The gear motor is separated from / connected to the friction type brake lock shaft testing device in a mode of manually sliding the sleeve tooth structure leftwards / rightwards, so that a variable frequency motor / gear motor is selected as main power equipment of the testing device, and a dynamic brake performance test and a static lock shaft performance test are respectively carried out. When a dynamic braking performance test is carried out, the number of inertia discs on the inertia rotor assembly is increased or decreased to match the target rotational inertia, or the test rotational inertia and the test braking rotating speed are matched in an equivalent kinetic energy mode. The testing device is additionally provided with a data acquisition control cabinet which can adjust the working oil pressure and the working speed of the variable frequency motor in real time according to working condition requirements. The device is used for testing the performance of the friction type brake lock shaft device.