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Global adaptive output feedback stabilization for nonlinear time‐delay systems with unknown measurement sensitivity
Author(s) -
Wang Wanli,
Lin Yan,
Zhang Xu
Publication year - 2021
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.5605
Subject(s) - control theory (sociology) , observer (physics) , nonlinear system , sensitivity (control systems) , controller (irrigation) , computer science , lyapunov function , state observer , output feedback , mathematics , control (management) , engineering , artificial intelligence , physics , agronomy , quantum mechanics , electronic engineering , biology
In this article, a global output feedback stabilization scheme is proposed for a class of time‐delay uncertain nonlinear systems with unknown measurement sensitivity. A new high gain observer is designed with which the sensitivity function can be tackled by only one dynamic gain and the coupled linear‐like controller is fairly simple. By introducing some transformations of the state estimation errors and observer states, and appropriately choosing Lyapunov–Krasovskii functionals, it is proved that the proposed controller can globally stabilize the system.