Study on Assist Coefficient and Disturbance Resistance for EPS
In this study, a nonlinear Electric Power Steering (EPS) system dynamic model based on road disturbance and torque sensor noise is investigated. In this paper, a new method of determining assist coefficient is proposed to obtain good drivers feel, which is only relative to vehicle velocity. Evaluation indexes and an augmented system combined with the state space model of EPS are obtained. H∞ control theory is introduced to minimize road disturbance and sensor noise, and Linear Matrix Inequalities (LMIs) method is employed to design an optimal H∞ dynamic output feedback controller. Simulation results show that the controller has good robustness and can reduce the influence of disturbance. So it can maintain good drivers feel and the systems stability.
EPS Assist Coefficient LMIs Optimal H∞ Dynamic Output Feedback Controller
Jianwei Wei Minxiang Wei
College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Nanjing,China
国际会议
长沙
英文
1076-1079
2009-04-11（万方平台首次上网日期，不代表论文的发表时间）