DocumentCode
881290
Title
Conditions for preservation of stability of adaptive controllers for systems with unmodeled delay
Author
Fernandez, George ; Ortega, Romeo ; Begovich, Ofelia
Author_Institution
Div. de Estudios de Posgrado, Fac. de Ingenieria, Mexico City, Mexico
Volume
33
Issue
6
fYear
1988
fDate
6/1/1988 12:00:00 AM
Firstpage
601
Lastpage
603
Abstract
Some recent results from the mathematical literature are used to derive conditions under which stability of an adaptive controlled system (first-order plant with output feedback) is preserved in spite of the presence of a time delay in the plant input. Bounds on the delay, for which stability is preserved, are derived for three robust versions of the gradient update law: fixed σ modification with and without normalization and a time-varying σ modification
Keywords
adaptive control; delays; stability; adaptive controllers; fixed σ modification; stability preservation condition; time-varying σ modification; unmodeled delay; Adaptive control; Adaptive systems; Control systems; Delay effects; Delay systems; Equations; Output feedback; Programmable control; Robust stability; Upper bound;
fLanguage
English
Journal_Title
Automatic Control, IEEE Transactions on
Publisher
ieee
ISSN
0018-9286
Type
jour
DOI
10.1109/9.1264
Filename
1264
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