Model-based synthesis of nonlinear PI and PID controllers

Abstract

PI and PID controllers continue to be popular in industrial applications. It is well known that linear PI and PID controllers result from the application of model-based controller design methods to linear first and second-order systems. This work shows that nonlinear PI and PID controllers result from application of nonlinear controller design methods to nonlinear lirst and second-order systems. Examples illustrating nonlinear PI and PID controllers are given for chemical process models.