Optimal tuning of PI/PID controllers for integrating processes with inverse response

Processes showing an initial response that is opposite to the final steady-state are present in industrial applications. Control of such processes involves difficulties and recently researchers have started paying great attention to the control of such processes. This paper reports on deriving optimal tuning rules for controlling integrating processes with inverse response. Simple and optimal analytical formulae for PI controllers have been derived based on Integral performance criteria. Simulation examples have been given to demonstrate the usefulness of the suggested approach.