Electric power-assisted steering test stand

A technology of electric power steering and test bench, which is applied in the direction of vehicle steering/bump performance, vehicle testing, machine/structural component testing, etc. It can solve the problems of tediousness, complex loading system, and difficulty in guaranteeing the simulation accuracy of loading resistance, etc., to achieve The effect of good real-time performance and high simulation accuracy

Inactive Publication Date: 2009-03-25
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, domestic EPS system performance test devices mostly use hydraulic actuators or spring loading, and the loading system is complex, cumbersome or cannot truly simulate the actual steering resistance of the car.
The utility model vehicle electric power steering system simulation test device (200420065141.3) uses the motor to load the steering system, but its loading command is calculated based on the two-degree-of-freedom vehicle dynamics model, and it is difficult to guarantee the simulation accuracy of the loading resistance; and it needs Separately develop the controller for loading the motor
[0005] In addition, the steering front wheel assembly is usually omitt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] When the simulated vehicle is running, the right steering front wheel 25 is removed from the test device, and the driver applies a steering input to the EPS system at a certain simulated vehicle speed (set in the real-time vehicle dynamics model), and the signal of the steering wheel angle sensor 34 The high-speed sampling card 40 enters the test device control system for real-time vehicle dynamics simulation and steering resistance torque command value calculation, and the steering resistance torque command value is converted by the high-speed sampling card 40 to form the voltage drive command of the electric cylinder actuator 27, thereby Drive the electric cylinder push rod to load the steering rack to simulate the steering resistance torque; at the same time, the vehicle speed (consistent with the simulated vehicle speed) signal and the engine speed signal sent by the test device control system enter the electronic control unit 7 through the high-speed sampling card 40...

Embodiment 2

[0025] When simulating the vehicle turning in situ, connect the right steering front wheel to the test device, and use a screw to load the right steering front wheel to the actual vertical load on the real vehicle to simulate the steering resistance moment of the right front wheel. The EPS system applies steering input, and the signal of the steering wheel angle sensor 34 enters the control system of the test device through the high-speed sampling card 40 for calculation of the command value of the steering resistance torque (the command value of the steering resistance torque is calculated according to the results of the in-situ steering test of the actual vehicle), and the steering resistance The torque command value is converted by the high-speed sampling card 40 to form the voltage drive command of the electric cylinder actuator 27, thereby driving the electric cylinder push rod to load the steering rack to simulate the steering resistance torque of the left front wheel; at ...

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Abstract

The invention discloses an electric power-assisted steering test bed, which comprises an EPS system assembly and a detection system, and is characterized by further comprising a loading mechanism, a test device control system, wherein the EPS system assembly also comprises a right-steering front-wheel assembly which consists of a steering control arm, a steering knuckle arm and a front wheel, the steering control arm and the steering knuckle arm are connected with the front wheel, the other end of the steering knuckle arm is connected with a steering transverse pull rod, one part of the loading mechanism is linked with a steering rack, the other part of the loading mechanism is linked with the steering control arm, and the test device control system is electrically connected with the EPS system assembly and the loading mechanism. The electric power-assisted steering test bed has high simulation precision of steering resistance and good timeliness of the control system, and can provide a real time dynamics simulation environment of vehicles. The electric power-assisted steering test bed realizes a good platform for performing performance test on the EPS system.

Description

technical field [0001] The invention belongs to the technical field of automobile chassis performance testing equipment, and in particular relates to an automobile electric power steering test bench. Background technique [0002] Electric Power Steering (EPS for short) technology has been greatly developed in China, and it is currently a research hotspot in domestic steering technology. How to test the performance of the EPS system and evaluate the EPS control strategy in the laboratory environment is a problem that researchers need to consider emphatically. Reasonable loading method, realistic simulation environment and real-time sampling control are the key issues to be solved by the EPS system performance test device. [0003] At present, many domestic enterprises and institutions of higher learning have developed EPS system performance testing devices. [0004] However, domestic EPS system performance testing devices mostly use hydraulic actuators or spring loading, an...

Claims

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Application Information

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IPC IPC(8): G01M17/06G01M17/007
Inventor 刘明辉魏文若吴浩
Owner CHINA FIRST AUTOMOBILE
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