Stability Analysis of Multi-dimensional Coupled Shimmy System Based on Center Manifold Theory

被引：0
|
作者：
Wei H. [1 ]
Lu J. [1 ]
Ye S. [1 ]
Shi L. [1 ]
机构：
[1] School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2023年 / 59卷 / 04期
关键词：
center manifold; dynamic coupling; independent suspension; stability; vehicle shimmy;
D O I：
10.3901/JME.2023.04.155
中图分类号：
学科分类号：
摘要：
Since the tire lateral force is sensitive to the change of the vertical load, the influence of the motion of the sprung mass on vehicle shimmy cannot be ignored. Therefore, based on the analysis of dynamic coupling mechanism of the vertical and lateral motion of the vehicle, a dynamic model of vehicle shimmy system with independent suspension considering multi-dimensional coupling is established. According to the Jacobian matrix of the system differential equations, the eigenvalues of the shimmy system with the change of the vehicle speed are investigated. Then, the two-dimensional center manifold of the shimmy system is obtained on basis of the center manifold theory. Moreover, the stability of the limit cycle of the system is discussed by calculating the stability parameters of the central manifold. Finally, numerical examples are used to verify the results of stability analysis, and the influence of the system parameters on the shimmy amplitude is investigated. The results show that the lightweight of the vehicle and the reduction of the distance from the mass center of the sprung mass to its roll axis are beneficial to attenuate vehicle shimmy, thus improving the stability and safety of the vehicle. © 2023 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.
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页码：155 / 162
页数：7
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