Research and simulation of EPS power control strategy in heavy vehicles

ZHOU Shi-you1，LI Ting1，WANG Zhao-dong2

（1. School of Information Engineering，Wuyi University，Jiangmen 529020，China；2. School of Information Science and Engineering，South China University of Technology，Guangzhou 510640，China）

Abstract：Aiming at the application of electric power steering（EPS）in heavy vehicles，the theoretical analysis，study and simulation of the EPS power control strategy for heavy vehicles were presented. The static characteristic and the physical hardware of recirculating ball steering gear were designed and modeled on the basis of the analysis of the characteristics of heavy vehicles EPS. A two-lay structure controller was put forward on EPS of heavy vehicles，including the target current control and power motor control. The sugeno-fuzzy control，inertia compensation and fuzzy PID integrated control strategy were designed respectively based on power control mode，and be verified in the Simulink. The simulation results indicate that，the problem of inertia，flexibility and rapidity of the response can be solved better，the control strategy can be as a theory of reference of EPS development and application for heavy vehicles.