车辆ISD悬架系统网络综合及性能分析

The network synthesis and characteristics analysis of an inerter-spring-damper suspension system

为进一步改善车辆的乘坐舒适性,将惯容器元件应用到车辆被动悬架系统,构建ISD悬架,利用网络综合方法确定ISD悬架结构。以车身加速度均方根值为优化目标,求解出ISD悬架的正实阻抗传递函数,然后用惯容器、弹簧、阻尼元件将之物理实现出来,建立1/4车辆悬架模型。采用多目标优化方法对ISD悬架参数进行优化,在此基础上,分析随机和脉冲激励下ISD悬架系统的综合性能。结果表明,与传统悬架相比,ISD悬架系统具有良好的动态性能,车身加速度均方根值减小了26.83%,1-3 Hz范围内有效抑制了车身垂直振动,改善了车辆在低频段的乘坐舒适性。

In order to improve the ride comfort of vehicles,an inerter was applied to a vehicle suspension system to build ＂inerter-spring-damper＂（ ISD） suspension. The structure of the ISD suspension was determined by using a network synthesis method. The impedance transfer function of the ISD suspension was obtained with the root-mean-square（ RMS）of the vehicle body acceleration as the ride comfort index. It could be physically realized by using passive elements such as inerter,spring and damper. A quarter car vehicle model was built. By using the multi-objective optimization method,structural parameters of the ISD suspension were optimized. On this basis,the performance of the suspension system was verified under random and pulse input. The results show that in contrast to conventional suspension,the proposed suspension has a better dynamic performance. The RMS of body vertical acceleration is reduced about 26. 83%. The ISD suspension can suppress vertical vibration of vehicle body within the frequency of 1- 3 Hz and improve the ride comfort of vehicles.