In this paper, the adaptive model-following control theory applied to
position control of a hydraulic servoactuator is first presented. Second, a digital adaptive model-following PID controller is implemented on a
PC-based computer with Delphi 6.0 software. The simulated and
experimental results show the performance of the PID controller with and
without the adaptive model-following control effects. The model-following
effects on position control reveals that the performance of the PID
controller can be improved by a suitable adaptation signal.