Co simulation and design of distributed driving electric vehicle EPS
                                                   CUI Ji ming, ZHAO Jing bo, WANG Xiang, ZHAI Yu
             （School of Automation and Transportation Engineering, Jiangsu University of Technology, Changzhou 213001, China）

Abstract: Aiming at the portability and stability of car steering, study on electric power steering （EPS）for distributed driving electric vehicles were carried out, the fuzzy PID control algorithm assisting the motor current was designed, the distributed driving electric vehicle model by Adams/car was established, a mechatronic co simulation method based on car and Simulink was presented, the portability of steering lane change, the stability of angle step input and low speed self aligning were tested under the closed control loop of co simulation model, the response curve of steering wheel torque, yaw rate and vehicle lateral acceleration were analyzed.The experimental results show that the portability and vehicle handling stability are increased by 35.5% and 13.9% respectively under EPS, compared with the PID control, the designed fuzzy PID control improves the overall steering performance of the car.

Key words: distributed driving electric vehicle; electric power steering（EPS）; co simulation