汽车转向轮摆振的稳定性和分叉特性

以三自由度前桥转向轮模型为对象，用常微分方程稳定性理论和动力系统理论，对其摆振稳定性及分叉特性进行了研究，找到了引起摆振和减小摆振幅值的敏感参数，并首次通过理论分析发现，当参数设计合理可彻底消除自激振动摆振，当参数设计不合理时有二次摆振现象。

STUDYING THE STABILITY AND BIFURCATION CHARACTER OF AUTOMOBILE SHIMMY

e study the stability and bifurcation character of the front bridge and turning wheel model with three degrees of freedom by the stability theory of ordinary differential equations and dynamical system theory. The sensitive parameters which can cause shimmy and reduce the amplitude of shimmy are found. We discover that the autonomous shimmy can disappear if the sensitiVe parameters are designed suitably, and the second shimmy may be appear if the parameters are not designed suitably. The manner that reduce and eliminate shimmy has been given.