Application of intelligent PDF control algorithm to an electrohydraulic position servo system

摘要

This paper is concerned with a position control of electrohydraulic servomechanisms using intelligent Pseudo Derivative Feedback (PDF) control algorithm. A dynamic model of an electrohydraulic servo valve controlled motor and the identificationmethod of its parameters have been derived. The tuning procedures of finding the optimum set of control coefficients have been presented. The performance of the PDF control electrohydraulic servo system was evaluated through simulations and experimentalstudies. The results show that the PDF controller possesses better transient behavior to step reference input, much better external load handling capability and less sensitivity to inertia variations, compared with those of Proportional plus Integral plus Derivative (PID) feedback controller.