基于AMESim的馈能式半主动悬架仿真研究

Simulation Research on Energy-regenerative Suspension Based on AMESim

提出了一种基于EHA的车辆馈能式半主动悬架结构,并针对车辆在振动较小的状态下电能无法得到有效回收的问题,引入了Boost升波斩压电路对馈能电压进行泵升。在AMESim软件中建立了1/4车辆EHA半主动悬架模型。同时,在MATLAB/Simulink中设计了半主动悬架LQG最优线性二次控制器以及Boost电路仿真模型。利用AMESim与MATLAB/Simulink软件,对EHA半主动悬架能量回馈特性以及车辆行驶平顺性进行了联合仿真研究。结果表明,在LQG控制下EHA半主动悬架有效地降低了车身加速度、悬架动挠度、轮胎动载荷,从而提高了车辆的乘坐舒适性与行驶安全性;同时在Boost电路泵升作用下,馈能电压得到了有效回收。

A kind of vehicle semi-active suspension is put forward based on Electro-Hydrostatic Actuator （ EHA ）. For low energy recovery under the small vehicle vibration, Boost chopper is introduced into EHA semi-active suspension. According to the analysis of EHA principle and vehicle structure, models of semi-active suspension with EHA are established by using AMESim software. LQG Controller for EHA semi-active suspension is designed by MATLAB/Simulink. The proposed control algorithm was integrated with the AMESim vehicle model and the co-simulations is performed. The results show that EHA semi-active vehicle suspension using LQG control is effective under different frequency road. Vehicle body acceleration, suspension dynamic deflection and tyre dynamic load evidently drop, so that ride comfort, handling and stability of vehicle are improved. At the same time, regenerative energy can be achieved.