NDLI: Retrospective cost adaptive control for nonminimum-phase systems with uncertain nonminimum-phase zeros using convex optimization

Content Provider	IEEE Xplore Digital Library
Author	Morozov, A.V. D'Amato, A.M. Hoagg, J.B. Bernstein, D.S.
Copyright Year	2011
Description	Author affiliation: Dept. of Mech. Eng., Univ. of Kentucky, Lexington, KY, USA (Hoagg, J.B.) \|\| Dept. of Aerosp. Eng., Univ. of Michigan, Ann Arbor, MI, USA (Morozov, A.V.; D'Amato, A.M.; Bernstein, D.S.)
Abstract	Retrospective cost adaptive control (RCAC) can be applied to command following and disturbance rejection problems with plants that are possibly MIMO, unstable, and nonminimum phase. RCAC requires knowledge of a bound on the first nonzero Markov parameter as well as knowledge of the nonminimum-phase zeros of the plant, if any. The goal of the present paper is to increase the robustness of RCAC to uncertainty in the locations of the nonminimum-phase zeros. Specifically, a convex constraint is imposed on the poles of the controller in order to prevent the adaptive controller from attempting to cancel the nonminimum-phase zeros. Numerical results show that, when constrained convex optimization is used at each step, the transient response is improved and the adaptive controller has increased robustness to uncertainty in the locations of the nonminimum-phase zeros.
Sponsorship	Control Syst. Soc.
Starting Page	1188
Ending Page	1193
File Size	418490
Page Count	6
File Format	PDF
ISBN	9781457700804
ISSN	07431619
e-ISBN	9781457700811
DOI	10.1109/ACC.2011.5990991
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Markov processes Transient analysis Robustness Steady-state Polynomials Poles and zeros
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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