制动力矩波动引起方向盘抖动的传递途径试验研究

通过制动抖动整车道路再现试验和dynamo试验台的制动器台架试验研究，确定了制动器制动力矩的低频波动（BTV）向方向盘传递的主要路径，并考察了传递路径中各个零部件对制动抖动的吸收与放大，为寻求传递途径的衰减控制措施奠定了良好的基础。研究表明，制动力矩波动传递的主要过程是制动力矩经过轮胎地面耦合作用，经过悬架系统传递到转向横拉杆并最终传递到方向盘，制动抖动在传递过程中整体衰减，但是在局部存在放大现象，机械结构上的放大对抖动的传递有很大的影响。

Experimental Research on the Transfer Path of Steering Wheel Wobbling Induced by Brake Judder

The transfer path of the low frequency brake torque variation shifting to the steering wheel was acquired. The steering wheel vibration reappearance test was conducted as a road test and dynamo test rig experiments were also carried out. The effect factors were analyzed including the influences of different parts of the front suspension and steering system. The research work presented in the psper will be helpful for control method researching to reduce the vibration through transfer path. The results show that the brake torque variation passes the tire-ground coupling system, the front suspension system, the steering system and finally reaches to the steering wheel. The transfer path attenuates the signal overall and amplifies thd signal in some local parts. The mechanical amplification in the structure plays an important role in the signal transferring.