Design of a Self-adaptive Fuzzy PID Controller for Valveless Electro-hydraulic Position Servo System

摘要

A self-adaptive fuzzy PID controller, which can dynamically modify the controller's parameters by using fuzzy rules presented in this paper, is designed for a valveless electro-hydraulic position servo system with considering the dynamic characteristics of AC servo motor. Based on the relationship between the parameters of conventional PID controller and the dynamic nature indexes, the fuzzy rules table is found for updating the controller's parameters, the simulation results show that the designed self-adaptive fuzzy PID controller, which compares with conventional PID controller, can obtain good dynamic performance and is robust to the external disturbances.