制动抖动传递路径试验

Experiment of transfer path of brake judder

为了获取制动引起转向盘抖动的传递路径,通过在转鼓试验台上模拟路面行驶工况,对制动抖动现象进行了再现,并对制动钳到转向盘的传递路径进行了分析,同时分析了振动由制动钳向转向盘传递过程中的中间环节。试验分析结果表明,制动抖动的传递路径为:制动器→制动器支架→转向节臂→转向横拉杆→转向万向节→转向盘。振动在传递过程中有放大环节也有缩小环节。通过试验准确确定出的制动抖动传递路径可为抖动控制提供依据。

In order to obtain the transfer path of the steering wheel judder caused by brake, the running conditions of the road surface were simulated on the rotary drum test bench, the brake judder phenomenon recurred. The vibration accelerations of the caliper, caliper bracket, knuckle arm, tie rod, universal joint, and steering wheel were acquired. Meanwhile, the vibration signals of the steering wheel were analyzed at vertical, lateral, and radial directions. The first and second order frequencies were confirmed through order analysis. The transfer path from caliper to steering wheel was analyzed. The intermediate links were also analyzed during vibration transferring from caliper to steering wheel. The experiment results show that the transfer path of the brake judder is mainly caliper-caliper bracket-knuckle arm-tie rod-universal joint-steering wheel. The brake judder was enlarged or diminished during the transfer process, and it was transferred to the steering wheel after enlarging and diminishing at the three directions.