基于EHA的车辆主动悬架建模与仿真研究

Modeling and Simulation of Automotive Active Suspension Based on EHA

采用一种新颖的可控减振技术,提出基于EHA的主动悬架系统。文章在建立1/4车辆悬架动力学模型和EHA综合模型的基础上,以天棚阻尼模型作为参考模型,利用模糊控制方法对簧载质量的垂直加速度进行控制并与被动悬架进行了比较。仿真结果表明:在随机和脉冲两种信号的激励下,相对于被动悬架,主动悬架簧载质量的垂直加速度均方根值分别下降了27%、16%,结果证明了所建模型的正确性以及模糊控制方法对改善汽车性能的可行性和有效性。

A novel actuator is introduced into vehicle active suspension system based on EHA in the paper. Based on the hybrid models of a quarter dynamics model of active suspension and the EHA, using the skyhook model as the reference model, a fuzzy logic control method is applied to control the vertical acceleration of active suspension. The simulation result illustrates, excited by both random disturbance input and pulse input, using the fuzzy logic control method can reduce the value of mean square root at vertical acceleration of active suspension system by 27% and 16%, respectively. All results show that the models built in this paper are correct and the fuzzy logic control method used to improve the performance of automobile is feasible and effective.