某新型线控转向系统的自适应模糊滑模控制

Adaptive Fuzzy Sliding Mode Control for a Novel Steering-by-wire System

为实现一种新型线控转向系统的转角跟踪性能,提出了一种自适应模糊滑模控制(AFSMC)方法。传统的滑模控制(SMC)设计需要预先获得系统扰动量,而AFSMC可通过在线模糊自适应系统实时估计出系统扰动量,进而减弱控制律中的切换项信号,降低了控制系统的保守性和抖振现象。仿真结果表明,AFSMC控制下的线控转向系统具有良好的转角跟踪性能、鲁棒性和能效。

To achieve the steering angle tracking performance of a novel steering-by-wire system,an adaptive fuzzy sliding mode control（ AFSMC） scheme is proposed. Traditional sliding mode control needs to get the system disturbance in advance,while AFSMC can estimate system disturbance in real time by on-line fuzzy adaptive system,and hence weaken the switching signal in control law,reducing the conservativeness and chattering phenomena of control system. Simulation results show that the steering-by-wire system with AFSMC has satisfying steering angle tracking performance,robustness and energy efficiency.