Parameter calibration and simulation of fractional PID controller for hydraulic servo system

This thesis proposed the integer order, fractional orderPID controller parameter tuning scheme for the hydraulic servo position system controlled object. The controller parameters are given by the geometric meaning of the controller parameter vector, based on the improved Ziegler-Nichols algorithm. The simulation results show that the system achieves the expected control index, and obtains a high steady-state accuracy, fast dynamic response and good robustness.