Effect of variation in filter coefficients for different PID controller structures on performance of SOPDT process

Abstract

The proportional-integral-derivative controllers are being used by process industry to control various complex industrial processes, due to their simplicity and easy implementation. There are various structures of PID controllers available in the literature which makes it difficult to decide the selection of suitable controller structure for a particular industrial process model. This complexity further increases in case of structures with derivative filters. It is a matter of investigation to evaluate the effect of varying the filter coefficient on controller performance for such PID controller structures. The present analysis lay emphasis on the set-point tracking capability of the controller by weighting the filter coefficients of these structures.