Analysis of current control status of the electric power steering system
WANG Xubin1, WANG Shengchang2
(1.Department of Automobile Engineering, Henan Communication Vocational and Technical College, Zhengzhou 450000,China；2.School of Automobile, Changan university, Xian 710064, China)
 

Abstract: Aiming at improving the steering agility, returnability, robustness of the electric power steering and the stability of vehicle, based on working principle and dynamic model of the EPS, the key control technologies were researched and compared, the research hotspot and difficulty were pointed out. The control trend of EPS that the vehicle performance and steering performance were same considered by using EPS working character, intelligent control and optimization algorithm was proposed. The comprehensive simulink model was built by combining dynamic model, assist curve table with the motor PID control. The results indicate that the dynamic parameter affects system stability, the different PID control parameter influences the following behavior of DC current, assist characteristic valve reflects different steering agility and road feel for different steering resisting torque and speed. The simulation process can be referenced when developing the control strategy.
Key words: EPS; control item; control strategy; modeling simulation