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Author Karthikeyan, A. ♦ Safonov, M.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Other branches of engineering
Subject Keyword Output feedback ♦ Transfer functions ♦ Regulators ♦ Software standards ♦ Control theory ♦ Equations ♦ Terminology ♦ Game theory ♦ Robust control ♦ Adaptive control
Abstract It is well-known that using the standard completion of the squares (CoS) formula for the LQ regulator problem, the H∞ controller derivations and associated H∞ controller existence conditions can be directly obtained. In standard theory for general H∞ output-feedback control and in the associated software, certain preliminary “loop-shifting” transformations are needed which it turns out add unnecessarily to the complexity of the H∞ theory and to the problem of implementing the H∞ control theory in software. In this paper, we revisit the CoS derivations for the general H∞ output feedback problem without the usual assumptions or “loop-shifting” transformations. Similar to earlier work on continuous time case, our results demonstrate that with suitable notation the general case can be handled directly without loop shifting in discrete-time as well. In-fact, we notice that the formulae for the discrete-time case bear semblance to the continuous time formulae with appropriate modifications. Thus we are able to simplifying both the representation and the computation of general discrete-time H∞ output-feedback controllers.
Description Author affiliation: Dept. of Electrical Engineering -Systems, University of Southern California, Los Angeles, USA (Karthikeyan, A.; Safonov, M.)
ISBN 9781424438716
ISSN 01912216
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-12-15
Publisher Place China
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 340.04 kB
Page Count 6
Starting Page 6656
Ending Page 6661


Source: IEEE Xplore Digital Library