Research on Fuzzy-adaptive PID Control with Correction Factor of Electric Power Steering System

摘要

According to the power assisted control strategy of Electric Power Steering system (EPS), fuzzy-adaptive PID control with correction factor is proposed. The present method can not only change parameters of PID in dynamic process but also keep the form of rules and variable universe of discourse according to the control error. This control strategy overcomes the disadvantages that the fixed parameters cannot meet the requirement of the real-time control of EPS system. It can also improve the control precision. The simulation results show fuzzy-adaptive PID control with correction factor improves transient response and follow-up characteristic efficiently compared with traditional PID control and fuzzy-adaptive PID control.