PI-PD, an Extension of Proportional–Integral–Derivative Control

Abstract

My previous article on ‘Setting the parameters of proportional–integral–derivative controllers’ looked at the initial work of Ziegler and Nichols and how their concepts have developed into today’s proportional–integral–derivative controllers in the process industries. Here, I look further into the increased control possibilities the controller provides when used in the slightly modified form of a proportional–integral controller with proportional–derivative feedback.