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Adaptive compensation for infinite number of actuator failures with an application to flight control
Author(s) -
Wang Chenliang,
Guo Lei
Publication year - 2016
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.2585
Subject(s) - control theory (sociology) , actuator , compensation (psychology) , bounded function , nonlinear system , tracking error , computer science , uniform boundedness , integrable system , signal (programming language) , zero (linguistics) , adaptive control , function (biology) , mathematics , control (management) , artificial intelligence , psychology , mathematical analysis , linguistics , philosophy , physics , quantum mechanics , programming language , evolutionary biology , pure mathematics , biology , psychoanalysis
Summary In this paper, a new adaptive compensation control scheme is proposed for a class of nonlinear systems with unknown parameters and unknown actuator failures. The normal operation case and different failure cases of actuators are unified through a time‐varying model. By introducing a smooth function, an integrable auxiliary signal, and a bound estimation approach, the effect of failures is successfully compensated for, and the total number of failures is not restricted to be finite. It is shown that all closed‐loop signals are globally uniformly bounded, and the tracking error converges to zero asymptotically regardless of the possibly infinite number of actuator failures. An application to the longitudinal dynamic model of a twin otter aircraft is presented to illustrate the effectiveness of the proposed scheme. Copyright © 2015 John Wiley & Sons, Ltd.