Title :
Anti-windup in anticipation of actuator saturation
Author :
Wu, Xiongjun ; Lin, Zongli
Author_Institution :
Dept. of Autom., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
This paper considers control systems in the presence of actuator saturation. A traditional approach to alleviating the adverse effect of actuator saturation is to design an anti-windup mechanism and activate it as soon as the saturation occurs. A recent innovation is to delay the activation of the anti-windup mechanism until the degree of saturation reaches to a certain level. By allowing the nominal controller to function undisturbed in the face of modest actuator saturation, delayed activation of the anti-windup mechanism has been shown to lead to improvement in the closed-loop performance. In this paper, we propose to activate the anti-windup compensation in anticipation of actuator saturation and show that such a “precautionary” approach has the potential of leading to further improvement in the closed-loop performance, in terms of the transience quality in reference tracking and the region of stability.
Keywords :
actuators; closed loop systems; stability; actuator saturation; anti-windup mechanism; closed-loop performance; control systems; nominal controller; stability; Actuators; Algorithm design and analysis; Ellipsoids; Iterative algorithm; Optimized production technology; Windup;
Conference_Titel :
Decision and Control (CDC), 2010 49th IEEE Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-7745-6
DOI :
10.1109/CDC.2010.5717907