Electric power-assisted steering test stand

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...

AI Technical Summary

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 omitted in the domestic EPS system performance test device, which is very unfavorable for the real simulation of the in-situ steering resistance moment, but the EPS system performance in the in-situ steering condition is exactly the EPS An important performance that the system needs to examine

[0006] Moreover, the control system of the domestic EPS system performance test device is usually not real-time, and cannot perform real-time vehicle dynamics simulation, and cannot provide a real-time vehicle simulation environment for the EPS system performance test; nor can it use the control system of the test device itself to perform Real-time control of devices (such as loading motors)

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