非线性闭环汽车电动助力转向系统稳定性分析  

Analysis of Stability for Nonlinear Closed-loop Vehicle Equipped with Electric Power Steering System

作　　者：李强[1] 何仁[2] 

机构地区：[1]浙江科技学院,杭州310023 [2]江苏大学,江苏镇江212013

出　　处：《森林工程》2008年第1期37-40,共4页Forest Engineering

基　　金：江苏省"六大人才高峰"基金项目资助(E-2002-12)

摘　　要：建立基于魔术轮胎公式的驾驶员—装备EPS系统汽车闭环系统非线性操纵动力学模型,在此基础上运用现代非线性动力学理论对该模型在自治情况下进行非线性动力学特性分析和数值仿真,指出分岔速度对闭环系统非线性运动稳定性的影响规律,分析EPS系统参数对闭环系统Hopf分岔速度的影响,着重研究了EPS系统的电动机的转动惯量参数对闭环系统Hopf分岔速度的影响。In this paper, nonlinear handling dynamics model of vehicle equipped with electric power steering （EPS） system and closed-loop system was established based on the magic tyre formula. Using modern nonlinear dynamics theory, the model was carried out on the analysis of nonlinear dynamic characteristic and the numerical simulation in autonomous case. The influence law of bifurcation speed on nonlinear motion stability of closed-loop system was discussed. The influence of parameters of the EPS sys- tem on bifurcation speed was also studied. At last the influence of moment of inertia of motor on the speed of Hopf was investigated in details.

关 键 词：非线性闭环系统 电动助力转向系统 HOPF分岔 稳定性 

分 类 号：U461.1[机械工程—车辆工程]