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Rejection of narrow‐band disturbances subject to uncertain time delays
Author(s) -
Savaresi Sergio M.,
Wittenmark Björn
Publication year - 2000
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/(sici)1099-1115(200002)14:1<39::aid-acs599>3.0.co;2-t
Subject(s) - robustness (evolution) , control theory (sociology) , variance (accounting) , minimum variance unbiased estimator , noise (video) , controller (irrigation) , computer science , mathematics , statistics , control (management) , artificial intelligence , biochemistry , chemistry , accounting , mean squared error , biology , agronomy , business , image (mathematics) , gene
In this work, the problem of designing feedback contollers for the rejection of narrow‐band disturbances is considered. The design technique proposed herein is based on the overparametrization of a nominal minimum‐variance controller, which is designed by means of an ARMA model of a sinusoid in noise. The extra degrees of freedom so introduced are used to improve the robustness of the nominal controller, when the time delay of the plant is subject to uncertainties, by minimizing a minimum‐variance performance index along a one‐dimensional line. Copyright © 2000 John Wiley & Sons, Ltd.