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High‐gain observers in nonlinear feedback control
Author(s) -
Khalil Hassan K.,
Praly Laurent
Publication year - 2014
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.3051
Subject(s) - high gain antenna , automatic gain control , nonlinear system , control theory (sociology) , observer (physics) , computer science , key (lock) , control (management) , noise (video) , nonlinear control , control engineering , engineering , artificial intelligence , telecommunications , bandwidth (computing) , amplifier , computer security , quantum mechanics , electrical engineering , image (mathematics) , physics
SUMMARY In this document, we present the main ideas and results concerning high‐gain observers and some of their applications in control. The introduction gives a brief history of the topic. Then, a motivating second‐order example is used to illustrate the key features of high‐gain observers and their use in feedback control. This is followed by a general presentation of high‐gain‐observer theory in a unified framework that accounts for modeling uncertainty, as well as measurement noise. The paper concludes by discussing the use of high‐gain observers in the robust control of minimum‐phase nonlinear systems. Copyright © 2013 John Wiley & Sons, Ltd.