PI AND PID-CONTROLLERS IN A HYDRAULIC POSITION SERVO SYSTEM - WHAT IT IS ALL ABOUT

摘要

In this paper the use of linear PI- and PID-controllers in a hydraulic position servo system has been studied both in experimental tests and simulation. The linear basic controllers have been realized discretely and applied on a hydraulic cylinder drive. Some nonlinearities (dead band, hysteresis) have been included in the forward loop. The tuning of controller parameters has been done in Bode-diagram. The tuning principles, as well as the advantages and drawbacks of PI- and PID controllers in hydraulic position servo applications, are discussed.