Damping matching test method and system based on magneto-rheological technology for automobile suspension system

Abstract

The invention discloses a method and a system for testing vehicle suspension damp match based on a magnetic flow variation technology. The system comprises: testing vehicle, an exciting platform, a magnetic flow variation damper, a power sensor, an offset sensor, a testing system constructed by an analog switch of external peak value testing module and a feedback controller. The method comprises: before testing, setting needed magnetic flow variation damper recovering damp value, compressing damp value and getting corresponding voltage signal; exciting the system by the up and down actions of the exciting platform; detecting piston relative offset signal peak by the offset sensor; switching the analog switch to input the voltage signal of the recovering damp value and the compressing damp value to the feedback controller as constant value; controlling the magnetic flow variation damper via the feedback controller to reach the set recovering damp and compressing damp value and get the optimum matching.

Description

Technical field [0001] The invention belongs to the vehicle damping matching test technology in the design of the automobile suspension system. Background technique [0002] Damping matching is a key link in the design of automobile suspensions, and damping matching tests must be carried out before new models of various automobile OEMs are put into production. At present, the method used in the damping matching test of various factories is to design a group of dampers with different damping values ​​(as many as ten or even dozens) in advance, and perform damping matching tests under different parameters on the test bench until one is selected. The kind of damper considered the best match. This kind of test is labor-intensive, long test period, and high cost. Moreover, because the damping force is determined in advance by the structural parameters and damping oil, it cannot be adjusted continuously, and it is difficult to achieve the optimal damping ma...

AI Technical Summary

Problems solved by technology

This kind of test to replace the damper is labor-intensive, the test period is long, and the cost is high. Moreover, since the damping force has been determined by the structural parameters and damping oil in advance, it cannot be adjusted continuously. This kind of test result is difficult to achieve the optimal damping matching.

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