汽车悬架减振器最佳阻尼匹配研究

The Study for Shock Absorber to Match Optimal Damping of Suspension

基于汽车平顺性要求,针对某城市SUV对其前麦弗逊悬架系统的减振器进行最佳阻尼匹配研究,通过建立减振器在工作行程中速度特性分段线性函数的数学模型,计算求得减振器工作中所对应的开阀点的力值;依据减振器试验台测试标准对所设计减振器的外特性进行了台架试验,减振器的速度特性匹配曲线与减振器MTS台架试验曲线在开阀速度处的力值误差仅为13%;依据悬架的硬点参数建立了1/2悬架ADMAS模型,通过更改减振器的属性文件及对悬架进行双轮同向激励,验证悬架的振动特性。实验结果表明,基于汽车平顺性的减振器最佳阻尼匹配研究方法正确,且匹配的减振器应用于实车前悬架具有良好的振动特性。

Based on the requirements of automobile ride comfort, aimed at a McPherson front suspension system which was adopted by a city SUV, it took its shock absorber to do optimum damping matching research, and the mathematical model of the shock absorber＇s speed characteristic piecewise linear function when it＇s in the working stroke was established, according the mathematical model it calculated the force of valve opening, and did the bench test for shock absorber external characteristic, the opening valve speed the force error between the shock absorber＇s speed characteristic matching curve and the curve obtained from the MTS bench test was only 13%. According to suspension hardpoints parameters it established a 1/2 suspension ADAMS model to verify the vibration characteristics of the suspension, and verified the vibration characteristics of suspension through parallel and opposite wheel travel simulation. Experimental results show that the suspension has good vibration characteristics after the matched shack absorber applied to the real car, the shock absorber＇s optimum damping matching design method is correct.