基于SIMPACK和MATLAB的汽车半主动悬架模糊控制及联合仿真

Fuzzy control and co-simulation of automobile semi-active suspension system based-on SIMPACK and MATLAB

在车辆行驶平顺性的研究中,为弥补传统数学建模方法不能完全反映实际整车行驶动态特性的缺点,以多体动力学仿真软件SIMPACK为平台,建立昌河某微型轿车的整车多体动力学模型。利用MATLAB设计半主动悬架模糊控制器,并进行联合仿真分析。仿真结果表明:车速为40km/h时,与被动悬架系统相比,车身垂直加速度、车身俯仰角速度标准差和峰值分别降低了10.76%、18.03%、20.48%、12.13%。有效衰减了车体振动,缓和了路面的振动冲击,改善了整车行驶平顺性,提高了乘坐舒适性。

Since the traditional mathematical modeling approach could nat fully reflect dynamic c hat- acteristics in driving automobile in the study of ride and comfort of the automobile ,a dynamic model Jbrfull minicar was built using multi-body dynamic simulation software SIMPACK in order to make up this weakness. Then a fuzzy controller was adopted to control the semi-active suspension and co-simulation was carried out, which results showed that the RMS deviation and peak of body normal acceleration,pitch angular velocity were reduced by 10.76% ,18.03% ,20.48% ,12.13% respectively compared with passive suspension system when a car is running at 40 km/h.A bove all the semi-active suspension based on fuzzy controller can effectively reduce vibration and shock ,ease the impact caused by vibration and improve ride comfort of the car.