Title :
Adaptive control of time-varying systems based on parameter set estimation
Author :
Watkins, John M. ; Kiriakidis, Kiriakos
Author_Institution :
Dept. of Weapons & Syst. Eng., US Naval Acad., Annapolis, MD, USA
Abstract :
Adaptive control of time-varying plants, in the presence of unmodeled dynamics and bounded disturbances, via parameter set estimation is proposed. The set estimator uses normalization and maps the uniformly bounded equation error on parametric error, which characterizes the modeled part of the plant. Based on the information from the set estimator, a switching control criterion selects the parametric vector from a set of nominal model parameters and tunes in the adaptive controller. At the same time, through stabilization against the parametric error, the policy renders the closed-loop modeled dynamics robust with respect to the equation error mechanisms
Keywords :
adaptive control; closed loop systems; parameter estimation; robust control; time-varying systems; uncertain systems; adaptive control tuning; bounded disturbances; closed-loop modeled dynamics; equation error mechanisms; normalization; parameter set estimation; parametric error; parametric error stabilization; robustness; switching control criterion; time-varying systems; uniformly bounded equation error; unmodeled dynamics; Adaptive control; Ellipsoids; Equations; Parameter estimation; Programmable control; Robustness; State estimation; Systems engineering and theory; Time varying systems; Weapons;
Conference_Titel :
Decision and Control, 1998. Proceedings of the 37th IEEE Conference on
Conference_Location :
Tampa, FL
Print_ISBN :
0-7803-4394-8
DOI :
10.1109/CDC.1998.761923
