基于制动器多点接触模型的初始SRO和DTV对制动抖动的影响分析
Influence of Initial SRO and DTV on Brake Judder Based on Disc Brake Model with multi-point contact
MENG DEjian; ZHANG Lijun; YU Zhuoping
For a disc brake system, the couples of brake disc and brake pads were supposed to be multi-point contact, and the brake dynamic model with multi-point contact was established considering a semi-empirical theoretical model of a friction coefficient-relative speed curve, which was verified by the rig experiment. Based on the model, assuming that the initial DTV and SRO could be represented mathematically as sinusoidal functions, the influence of the order,the maximum value and the phase of the initial DTV and SRO on brake judder were discussed in detail using the evaluation indicators of the time-frequency characteristics and the root mean square of the BPV and BTV. The results showed that the order of the DTV produces the order for the frequency of the BPV and BTV with the angular velocity; the BPV has the stronger sensitivity to the SRO the and BTV have the stronger sensitivity to the DTV; the roots mean square of the BPV and BTV has linear incremental relations to maximum values of the SRO and DTV; the phase of the SRO influenies the BPV and BTV by changing the maximum value of the DTV.
制动抖动 / 多点接触 / 制动盘厚薄差 / 制动盘端面跳动 / 制动力矩波动 / 制动压力波动 {{custom_keyword}} /
brake judder / multi-point contact / disc thickness variation (DTV) / Surface run-out(SRO) / brake torque variation(BTV) / brake pressure variation {{custom_keyword}} /
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