Two-Degrees-of-Freedom PID Control with the Use of Desired-Value Filter Composed of Time-Difference Comparison

Abstract

We propose a desired-value filter composed of time-difference comparison between desired value and feedback variable of a control system. In this filter, the function of the time-difference comparison is introduced in the usual error detector in order to make a moderate comparison, in results, to accomplish a superior response towards the desired value as a two-degrees-of-freedom control.