Stability Analysis of Vehicle Shimmy System with Independent Suspension Based on Complexification-Averaging Method

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Authors Abstract
Content
Based on the dynamic model of a quarter-vehicle system, a three degrees-of-freedom (DOF) dynamic model of the vehicle shimmy system with independent suspension is established by applying the second Lagrange equation. Numerical examples are employed to investigate the speed range and frequency characteristic of the vehicle shimmy system, and then the influence of the vertical load of the tire on vehicle shimmy is discussed. The equilibrium equation and characteristic polynomial of the shimmy system are obtained by using the complexification-averaging (CX-A) method, and the stability of the shimmy system is analyzed based on the first approximate stability theory. Furthermore, the boundary condition of Hopf bifurcation is investigated, and the stability boundary of the suspension parameters varying with the vehicle speed is obtained. The relevant conclusions can provide technical supports for the suppression of vehicle shimmy.
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DOI
https://doi.org/10.4271/10-05-04-0027
Pages
33
Citation
Wei, H., Lu, J., Shi, L., and Lu, H., "Stability Analysis of Vehicle Shimmy System with Independent Suspension Based on Complexification-Averaging Method," SAE Int. J. Veh. Dyn., Stab., and NVH 5(4):399-408, 2021, https://doi.org/10.4271/10-05-04-0027.
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Publisher
Published
Apr 13, 2021
Product Code
10-05-04-0027
Content Type
Journal Article
Language
English