电动汽车悬架动态特性仿真

Simulation of Electric Vehicle Suspension Dynamic Characteristics

摘要: 由于动力传动系统的改变，电动汽车的悬架动态特性与传统汽车不相同。本文以某电动汽车悬架系统相关参数为参考，在Matlab/Simulink环境中建立了四分之一车主动悬架模糊控制器。以车身垂直加速度、悬架弹簧动挠度以及轮胎动载荷等相关动态特性作为对电动车平顺性和操纵稳定性影响的评价指标。仿真结果表明，具有模糊控制器的半主动悬架对电动车悬架动态特性的改善有良好的效果。

Abstract: Due to the change of the powertrain system, the suspension dynamic characteristics of the electric vehicle are different from those of the conventional car. In this paper, based on the relevant pa-rameters of an electric vehicle suspension system, a quarter-vehicle active suspension fuzzy con-troller is established in the Matlab/Simulink environment. The dynamic characteristics of the verti-cal acceleration of the vehicle body, the dynamic deflection of the suspension spring, and the dy-namic load of the tire are used as evaluation indexes for the effects of ride comfort and operational stability of vehicle. The simulation results show that the semi-active suspension with fuzzy control-ler has a good effect on the improvement of dynamic characteristics of electric vehicle suspension.