Robust control of hand wheel torque for active front steering system  

作　　者：ZHAO WanZhong LI YiJun WANG ChunYan 

机构地区：[1]College of Energy & Power Engineering, Nanjing University of Aeronautics and Astronautics

出　　处：《Science China(Technological Sciences)》2015年第1期107-116,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51375007 and 51205191);NUAA Research Funding(Grant No.NS2013015)

摘　　要：Active front steering(AFS)system has been used as a promising technology which improves the steering portability and handing stability of vehicles.It employs a steering motor to realize the functions of variable steering ratio and vehicle stability control.However,it has a serious problem of unexpected reaction hand wheel torque caused by the additional steering angle.In this paper,the optimum hand wheel torque is designed based on the linear tire model.Considering the uncertainty and disturbance of the steering system and vehicle,an H∞controller is developed to make sure the hand wheel torque follows the reference torque accurately and quickly.The simulation shows that the proposed controller can compensate the unnatural reaction torque and provide a good steering feel for the driver.

关 键 词：active front steering variable steering ratio hand wheel torque H∞ control steering feel 

分 类 号：U463.4[机械工程—车辆工程] TQ055.81[交通运输工程—载运工具运用工程]