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

Volume

4

fYear

1998

fDate

16-18 Dec 1998

Firstpage

4002

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 1998. Proceedings of the 37th IEEE Conference on

Conference_Location

Tampa, FL

ISSN

0191-2216

Print_ISBN

0-7803-4394-8

Type

conf

DOI

10.1109/CDC.1998.761923

Filename

761923