EPS仿真方法.docVIP

Electric Power Steering Simulation Analyze Based on Fuzzy PID Current Tracking Control Huaiquan ZANG?, Shuanyong CHEN,Manman JIA Institute of Electrical and Engineering, YanShan University, QinHuangDao 066004, China Key Lab of Industrial Computer Control Engineering of HeBei Province Abstract Through analyzing of the electric power steering (EPS) structure and union the vehicle dynamic characteristics, this paper establishes a mathematical model of EPS. And the EPS system simulation model based on Matlab/Simulink is built. The fuzzy PID control strategy is adopted to control the actual current of the motor tracking precisely the target current, and the motor current compensation that for inhibition of road surface disturbance is taken. Conventional assist control and damping control that apply to the system with the different road and different speed are simulated and analyzed. The simulation results show that this strategy is effective and practical: target current tracking effect is better; the vehicle of steering torque decrease apparently compare with the non-assistant power system; the driver could get seemly road feel; the wallop to steering wheel is restrained effectively when the vehicle is driving on the uneven road. Keywords: Electric Power Steering; Current Tracking; Fuzzy PID; Damping Control; Introduction Because of low-carbon, energy saving, fault diagnosis oneself advantage factors, Electric Power Steering(EPS) is gradually replacing the hydraulic power steering system and leading the steering system in the modern car development[1, 3].According to the steering torque、automobile speed、and road conditions etc, the system can provide the real time assistant torque through assist motor to help driver steering, and make steering easier gentle, guarantee the driver has the best steering feel in the variety of operating conditions. At present, the design for the assist motor control have mainly two methods: the one is motor current loop control based on cla