摘要
针对车辆半主动悬架系统建立了切换系统模型,并利用输出反馈切换控制策略对该系统进行了控制率设计。为了分析控制率的控制效果,基于有理函数滤波白噪声生成法模拟路面不平度,并利用MATLAB/Simulink软件对悬架系统因路面不平度所产生的振动进行了仿真。结果表明:基于切换控制的低频半主动悬架与被动悬架相比,车身加速度降低了22%,悬架动挠度降低了36%,轮胎动载荷降低了13%。因此,基于切换控制的低频半主动悬架控制策略可以明显改善车辆的动态性能,提高车辆的乘坐舒适性及操纵稳定性。
According to the actual conditions,a switched system model and a control strategy based on the output feedback switching strategy method are proposed for a semi-active suspension system in this work.On the basis of this,in order to further analyze the control effect of the control strategy,a road roughness is produced based on the rational function filter white noise generation method,then analysis and comparison simulation about the vibration produced by the road roughness are carried out by MATLAB/Simulink.The simulation results show that compared with the passive suspension,the low-frequency semi-active suspension control strategy based on switching control is 22% lower,the suspension deflection is 36% lower,and the tire dynamic load is 13% lower.The results show that the low frequency semi-active suspension control strategy based on switching control can improve the dynamic performance of the vehicle and improve the ride comfort and handling stability of the vehicle.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第4期58-63,共6页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金(61603093)
广东省科技发展专项(2016AG100311)
广东省自然科学基金(2014A030313619)
关键词
半主动悬架
切换系统
路面不平度
动态性能
semi-active suspension
switching system
pavement roughness
dynamic performance
