Research on GA optimized fuzzy control strategy for electric power steering system

Structure analysis of TSK fuzzy controllers was performed.The characteristic parameter method was put forward for set partition of the characteristic parameters using analogy method,experience of PID parameter tuning and expert fuzzy control rules.Genetic algorithm off-line optimization was used to optimize the fuzzy controller.The model of GA-optimized TSK fuzzy controller was established and the simulation analysis was performed in Matlab/Simulink.The simulation results demonstrats that GA-optimized TSK fuzzy controller can track the target current of assist motor accurately and quickly with strong robustness during motor load variation and noise disturbance.It is quite suitable for assist motor of electric power steering in current loop control.