Antiwindup and Override Control for Exponentially Unstable Systems with Actuator Constraints

Authors:	Glattfelder Adolf Hermann, ETH Zurich, Switzerland Schaufelberger Walter, ETH Zurich, Switzerland
Topic:	2.3 Non-Linear Control Systems
Session:	Anti-windup
Keywords:	Exponentially unstable systems, Input and Output Constraint Control, Nonlinear Stability Analysis, Antiwindup, Override Control.

Abstract

Control of exponentially unstable plants with an actuator having both position and rate saturations is investigated. It is shown that the standard antiwindup technique is not able to increase the very limited radius of attraction. A novel design technique based on the override technique is proposed which enlarges the radius of attraction, such that the actuator working range can be utilized.