EPS assembly simulation steering wheel substitute driving durability test system

Abstract

The utility model provides an EPS assembly simulation steering wheel substitute driving durability test system, belonging to the EPS assembly durability test technology field, and comprises a control module, a driving module, a test bench, a state acquisition module and a data processing module, the output end of the control module is connected with the output end of the driving module, the output end of the driving module is connected with the input end of the test bench, and the state acquisition module is connected with the data processing module. The output end of the test bench is connected with the input end of the state acquisition module and the input end of the data processing module, and the output end of the state acquisition module is connected with the input end of the control module. The control module outputs a control signal to the driving module, the driving module drives the test bench, the test bench outputs test information to the data processing module, the test bench outputs state information to the state acquisition module, and the state acquisition module outputs state acquisition information to the control module. The EPS assembly durability test is simulated, so that the test safety is improved, and the test cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the EPS assembly durability test technical field, specifically, the utility model relates to a kind of EPS assembly simulation steering wheel substitute durability test system. BACKGROUND

[0002] With the development of automobile industry and the improvement of consumer's requirement to automobile safety and comfort, EPS system, as an important component of modern automobile steering system, its performance test and durability test become particularly important. Traditional real vehicle test is not only high-risk and expensive, but also difficult to simulate the performance of EPS system under various conditions.

[0003] Chinese patent CN212228395U discloses a kind of EPS special-purpose multifunctional test device based on CAN, including power module, control unit, display module and multifunctional operation module, the control unit is connected with the EPS to be measured by CAN bus communication, the display module and multifunctional operation module are connected with control unit, the power module is for the power supply of test device, the multifunctional operation module includes several independent function operation modules.

[0004] The prior art does not have simulation test for EPS assembly, and traditional real vehicle test will reduce safety and increase test cost. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of EPS assembly simulation steering wheel substitute durability test system, to reach simulation EPS assembly durability test, improve test safety, reduce test cost.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a kind of EPS assembly simulation steering wheel substitute durability test system, including control module, drive module, test bench, state acquisition module, data processing module, the output end of control module is connected the output end of drive module, the output end of drive module is connected the input end of test bench, the output end of test bench is connected the input end of state acquisition module and the input end of data processing module respectively, the output end of state acquisition module is connected the input end of control module.

[0008] The control module outputs control signal to drive module, the drive module drives test bench, the test bench outputs test information to data processing module, the test bench outputs state information to state acquisition module, the state acquisition module outputs state acquisition information to control module.

[0009] The control module adopts a programmable controller, and an output end of the programmable controller is connected with an input end of the driving module.

[0010] The driving module comprises a servo driver and a servo motor, the servo driver is electrically connected with the servo motor through a motor three-phase wire harness, and an output end of the servo driver is connected with an input end of the servo motor through an encoder wire harness.

[0011] The test bench comprises a reduction motor, a steering wheel, an EPS assembly, an EPS controller and a load, the reduction motor is connected with the steering wheel, the reduction motor is connected with the EPS assembly, the EPS assembly is connected with the load through a steering shaft, and the EPS assembly is connected with the EPS controller through a wire harness.

[0012] The state acquisition module comprises a working state monitoring box, a torque sensor and a torque amplifier, input ends of the working state monitoring box are connected with output ends of the servo driver and the EPS controller respectively, an output end of the torque sensor is connected with input ends of the working state monitoring box and the EPS controller through the torque amplifier, and an output end of the working state monitoring box is connected with an input end of the control module.

[0013] The data processing module adopts a computer, and an input end of the computer is connected with an output end of the EPS controller.

[0014] The technical effect of the utility model is:

[0015] (1) the utility model improves test security, compared with real vehicle test, using programmable controller control servo motor simulation EPS assembly steering wheel to replace durability test of endurance test can significantly reduce the risk. Real vehicle test may involve high-speed driving and complex road conditions, while simulation test is carried out in a relatively safe environment, avoiding the potential risks in actual road test.

[0016] (2) the utility model reduces test cost, and the cost of simulation test is far lower than that of real vehicle test. Real vehicle test needs to consume a large amount of fuel, maintenance cost and possible damage repair cost. While simulation test is accurately controlled through programmable controller and servo system, reduces these additional expenses, and the test cycle is also shorter, further reduces the cost.

[0017] (3) the utility model enhances test flexibility, and the control system has high flexibility, which can adjust parameters and test schemes according to different test requirements. This means that a variety of different working conditions and conditions can be simulated on the same set of equipment without complex real vehicle adjustment. In addition, simulation test can be repeated conveniently to ensure the accuracy and reliability of the results.

[0018] (4) The utility model realizes accurate control, can accurately control the movement of servo motor and the load of steering system, thereby realizes the accurate simulation of EPS assembly steering wheel substitute endurance test. This accurate control not only improves the efficiency of test, but also ensures the accuracy and repeatability of test result. Meanwhile, the system can also collect and record test data in real time, provides strong support for subsequent analysis and optimization. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present specification includes the following drawings, and the shown contents are respectively:

[0020] Figure 1 It is the logic structure block diagram of the utility model of a kind of EPS assembly simulation steering wheel substitute endurance test system;

[0021] Figure 2 It is the schematic diagram of the utility model of a kind of EPS assembly simulation steering wheel substitute endurance test system;

[0022] Figure 1 Marked as: 1, control module;2, drive module;3, test bench;4, state acquisition module;5, data processing module. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are further explained in detail by comparing the drawings and the description of the embodiments, the purpose is to help the technical personnel in the field to have more complete, accurate and in-depth understanding of the utility model concept, technical scheme of the utility model, and help its implementation.

[0024] The utility model provides a kind of EPS assembly simulation steering wheel substitute endurance test system, including control module 1, drive module 2, test bench 3, state acquisition module 4, data processing module 5, the output end of control module 1 is connected the output end of drive module 2, the output end of drive module 2 is connected the input end of test bench 3, the output end of test bench 3 is connected respectively the input end of state acquisition module 4 and the input end of data processing module 5, the output end of state acquisition module 4 is connected the input end of control module 1.

[0025] Control module 1 exports control signal to drive module 2, drive module 2 drives test bench 3, test bench 3 exports test information to data processing module 5, test bench 3 exports state information to state acquisition module 4, state acquisition module 4 exports state acquisition information to control module 1.

[0026] Control module 1 uses programmable controller, the output end of programmable controller is connected the input end of drive module 2.

[0027] The driving module 2 comprises a servo driver and a servo motor, the servo driver is electrically connected with the servo motor through a motor three-phase wire bundle, and an output end of the servo driver is connected with an input end of the servo motor through an encoder wire bundle.

[0028] The test bench 3 comprises a reduction motor, a steering wheel, an EPS assembly, an EPS controller and a load, the reduction motor is connected with the steering wheel, the reduction motor is connected with the EPS assembly, the EPS assembly is connected with the load through a steering shaft, and the EPS assembly is connected with the EPS controller through a wire bundle.

[0029] The state acquisition module 4 comprises a working state monitoring box, a torque sensor and a torque amplifier, input ends of the working state monitoring box are connected with output ends of the servo driver and the EPS controller respectively, an output end of the torque sensor is connected with input ends of the working state monitoring box and the EPS controller through the torque amplifier, and an output end of the working state monitoring box is connected with an input end of the control module 1.

[0030] The data processing module 5 adopts a computer, and an input end of the computer is connected with an output end of the EPS controller.

[0031] The EPS assembly simulation steering wheel endurance test system is described in detail below.

[0032] The EPS assembly simulation steering wheel endurance test system comprises a control module 1, a driving module 2, a test bench 3, a state acquisition module 4 and a data processing module 5, wherein the control module 1 adopts a programmable controller, is used for generating a control signal according to a preset test program or a received test instruction and outputting to the driving module 2, and the control signal comprises a control signal of a rotation angle, a rotation angular velocity and a torque parameter of the servo motor in the driving module 2.

[0033] The driving module 2 comprises a servo driver and a servo motor, is used for controlling rotation of the servo motor, and simulates a punching action of a steering wheel. The servo driver receives the control signal of the control module 1, drives the servo motor to work according to the control signal with a set rotation angle, a rotation angular velocity and a torque. The servo driver in the utility model selects a TECO driver.

[0034] The test bench 3 comprises a reducer, a steering wheel, an EPS assembly, an EPS controller and a load, the rotation of the servo motor is converted into the rotation angle and rotation angular velocity of the steering wheel by the reducer to control the forward and reverse rotation and the number of turns of the steering wheel, and meanwhile the rotation of the servo motor is transmitted to the load through the EPS assembly. The EPS controller is used for collecting the rotation angle, rotation angular velocity, torque, voltage and current information of the EPS assembly and transmitting the collected information to the data processing module 5. The load can adopt a spring load or a magnetic powder brake load assembly.

[0035] The state collection module 4 comprises a working state monitoring box, a torque sensor and a torque amplifier, the working state monitoring box is used for monitoring the working states of the servo driver, the EPS controller and the torque sensor and outputting a fault signal to the control module 1 when a fault occurs.

[0036] The data processing module 5 adopts a computer, and the computer carries out data processing and analysis through software TSMaster.

[0037] The connection relationship of the utility model will be described in detail as follows.

[0038] As shown in Figure 2 the output end of the programmable controller (TECO PLC) is connected with the input end of the TECO driver through a control signal wire harness, the three-phase wire harness of the TECO driver is electrically connected with the plug of the servo motor, the output end of the TECO driver is connected with the control end of the servo motor through an encoder wire harness, the output shaft of the servo motor is connected with the input shaft of the reduction motor, the reduction motor is connected with the steering wheel through a steering shaft assembly, the steering wheel is connected with the upper steering shaft in the steering shaft assembly, the lower end of the upper steering shaft is connected with the lower steering shaft through a universal joint or a flexible coupling, and the lower steering shaft is connected with the reduction motor. The reduction motor is connected with the EPS assembly through a steering shaft, and the EPS assembly is connected with the load through a steering shaft. The EPS assembly is connected with the EPS controller through a wire harness, and the output end of the EPS controller is connected with the input end of the computer and the input end of the working state monitoring box respectively. The torque sensor is integrated in the middle part of the steering shaft between the EPS assembly and the load and detects the torque through a built-in torsion bar. The output end of the torque sensor is connected with the input end of the working state monitoring box and the input end of the EPS controller through a torque amplifier respectively. The output end of the working state monitoring box is connected with the input end of the programmable controller (TECO PLC).

[0039] The working process of the utility model will be described in detail as follows.

[0040] After connecting all the modules according to the connection relationship, the working parameters of the driving module 2 are set according to the durability test requirements, including the rotation angle, rotation angular velocity and torque of the servo motor. The state of the servo driver, the EPS controller and the torque sensor on the working state monitoring box is detected, and the durability test is started after the detection is passed.

[0041] The control module 1 outputs control signals to the servo driver according to the working parameters of the drive module 2, and controls the operation of the servo motor through the servo driver. The rotation of the servo motor is converted into the rotation speed and rotation angle of the steering wheel through the speed reducer to control the forward and reverse rotation and the number of turns of the steering wheel. At the same time, the output of the servo motor is finally output to the load through the speed reducer and the EPS assembly. The timer in the control module 1 controls the above working process back and forth to increase the test times. After the test reaches the predetermined test time, the test stops. The data processing module 5 collects the rotation angle, rotation speed, torque, voltage and current information of the EPS assembly output by the EPS controller, and the data processing module 5 obtains the test data for processing and analysis. The EPS assembly of the utility model can test different models of EPS assemblies by replacing the fixture.

[0042] When working, the working state monitoring box monitors the working state of the servo driver, the EPS controller and the torque sensor, and outputs a fault signal to the control module 1 when a fault occurs.

[0043] The technical effects of the utility model are described in detail below.

[0044] The utility model improves the test safety. Compared with real vehicle test, using programmable controller to control servo motor to simulate EPS assembly steering wheel for endurance test can significantly reduce the risk. Real vehicle test may involve high-speed driving and complex road conditions, while simulation test is carried out in a relatively safe environment, avoiding the potential risks in actual road test.

[0045] The utility model reduces the test cost. The cost of simulation test is much lower than that of real vehicle test. Real vehicle test consumes a lot of fuel, maintenance cost and possible damage repair cost. While simulation test is accurately controlled through programmable controller and servo system, reducing these additional expenses, and the test cycle is also shorter, further reducing the cost.

[0046] The utility model enhances the test flexibility. The control system has high flexibility, which can adjust parameters and test schemes according to different test requirements. This means that multiple different working conditions and conditions can be simulated on the same set of equipment without complex real vehicle adjustment. In addition, simulation test can be easily repeated to ensure the accuracy and reliability of the results.

[0047] The utility model realizes accurate control, can accurate control servo motor's movement and steering system's load, thereby realizes to EPS assembly steering wheel stand -in durability test's accurate simulation. This kind of accurate control not only has improved the efficiency of test, still ensured the accuracy and repeatability of test result. Meanwhile, system can also real -time acquisition and record test data, provides strong support for subsequent analysis and optimization.

[0048] The utility model has been described exemplarily above in connection with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned manner. As long as various non-essential improvements are made using the method concept and technical solution of the utility model; or without improvement, the above-mentioned concept and technical solution of the utility model are directly applied to other occasions, which are within the protection scope of the utility model.

Claims

1. An EPS assembly simulation steering wheel dialing endurance test system, characterized in that: The control module, the driving module, the test bench, the state acquisition module and the data processing module are connected.

2. The EPS assembly simulation steering wheel keying durability test system of claim 1, wherein: The control module outputs control signals to the driving module, the driving module drives the test bench, the test bench outputs test information to the data processing module, the test bench outputs state information to the state acquisition module, and the state acquisition module outputs state acquisition information to the control module.

3. A system for simulating a steering wheel for durability testing of an EPS assembly according to claim 1, characterized in that: The control module adopts a programmable controller, and the output end of the programmable controller is connected with the input end of the driving module.

4. A system for simulating a steering wheel for durability testing of an EPS assembly according to claim 1, characterized in that: The driving module comprises a servo driver and a servo motor, the servo driver is electrically connected with the servo motor through a motor three-phase wire bundle, and the output end of the servo driver is connected with the input end of the servo motor through an encoder wire bundle.

5. A system for simulating a steering wheel for durability testing of an EPS assembly according to claim 1, characterized in that: The test bench comprises a speed reducer, a steering wheel, an EPS assembly, an EPS controller and a load, the speed reducer is connected with the steering wheel, the speed reducer and the EPS assembly are connected through a steering shaft, the EPS assembly is connected with the load through a wire bundle, and the EPS assembly is connected with the EPS controller through a wire bundle.

6. A system for simulating steering wheel kick test of an EPS assembly as claimed in claim 1, 4 or 5, wherein: The state acquisition module comprises a working state monitoring box, a torque sensor and a torque amplifier, the input end of the working state monitoring box is connected with the output end of the servo driver and the output end of the EPS controller respectively, the output end of the torque sensor is connected with the input end of the working state monitoring box and the input end of the EPS controller through the torque amplifier, and the output end of the working state monitoring box is connected with the input end of the control module.

7. The EPS assembly simulation steering wheel keying endurance test system of claim 1 or 5, wherein: The data processing module adopts a computer, and the input end of the computer is connected with the output end of the EPS controller.

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