NDLI: Robust near-optimal output feedback control of nonlinear systems

Content Provider	IEEE Xplore Digital Library
Author	El-Farra, N.H. Christofides, P.D.
Copyright Year	2000
Description	Author affiliation: Dept. of Chem. Eng., California Univ., Los Angeles, CA, USA (El-Farra, N.H.)
Abstract	This work proposes a robust near-optimal nonlinear output feedback controller design for a broad class of nonlinear systems with time-varying uncertain variables. Through combination of a high-gain observer with a robust optimal state feedback controller, a dynamic robust output feedback controller is constructed that enforces exponential stability and robust asymptotic output tracking with arbitrary degree of attenuation of the effect of uncertainty on the output of the closed-loop system, for initial conditions and uncertainty in arbitrarily large compact sets, provided that the observer gain is sufficiently large. Utilizing the inverse optimal control approach and singular perturbation techniques, the controller is shown to be near-optimal in the sense that its performance can be made arbitrarily close to the optimal performance of the robust optimal state feedback controller on the infinite time-interval by selecting the observer gain to be sufficiently large.
Starting Page	3737
Ending Page	3741
File Size	508714
Page Count	5
File Format	PDF
ISBN	0780355199
ISSN	07431619
DOI	10.1109/ACC.2000.876919
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-28
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Robust control Output feedback Nonlinear control systems Control systems Nonlinear systems Optimal control Robust stability State feedback Uncertainty Time varying systems
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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