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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering >Brake judder analysis using a car rigid-flexible coupling model
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Brake judder analysis using a car rigid-flexible coupling model

机译：使用汽车刚柔耦合模型进行制动颤动分析

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摘要

In order to understand the brake judder of a passenger car, the brake judder test of a passenger car was performed with initial speeds of 90, 120, and 150km/h, end speed of 20 km/h, and pedal forces of 25, 30, 35, and 40 N on a roller dynamometer in a semi-anechoic chamber. The pressure fluctuation of the brake fluid pipe was presented. The accelerations of the steering wheel were recorded at vertical, lateral, and radial directions respectively, and the frequency analysis of the brake judder was also performed. The frequency response functions of the steering system were measured in order to understand the cause of the brake judder. Meanwhile, the multibody system dynamics model of the test vehicle was created with a flexible body and steering system. The brake torque calculated with the brake fluid pressure of the brake pipe in the brake judder test was exerted on the brake systems. The simulated accelerations of the steering wheel were calculated at three different directions, and the frequency analysis of the brake judder was also presented. The design of experiment was presented in order to reduce the brake judder and improve the comfort of the vehicle. An orthogonal array table was designed with 13 factors and 3 levels. The optimum combination was confirmed. The brake judder was also simulated, and the accelerations of the steering wheel were also calculated. Furthermore, the optimization results were verified by the brake judder test. The verification of the optimization indicates that the optimization results are correct and effective.
机译：为了理解乘用车的制动颤抖，对乘用车的制动颤动进行了测试，初始速度为90、120和150km / h，最终速度为20 km / h，踏板力为25、30在半消声室中的滚筒测力计上分别测量35 N和40N。给出了制动液管的压力波动。分别记录了方向盘在垂直，横向和径向的加速度，并对制动颤抖进行了频率分析。测量了转向系统的频率响应功能，以便了解制动颤振的原因。同时，利用灵活的车身和转向系统创建了测试车辆的多体系统动力学模型。在制动颤​​振测试中，通过制动管的制动液压计算出的制动扭矩施加在制动系统上。在三个不同方向上计算了方向盘的模拟加速度，并对制动颤振进行了频率分析。提出了实验设计，以减少刹车颤抖，提高车辆的舒适度。设计了具有13个因子和3个级别的正交数组表。确认了最佳组合。还模拟了刹车颤抖，并计算了方向盘的加速度。此外，通过制动颤振试验验证了优化结果。优化的验证表明优化结果正确有效。

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