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Comparisons of adaptive fault‐tolerant insensitive control methods for a class of linear systems
Author(s) -
Jin XiaoZheng,
Lü ShaoYu,
Tan Qi,
Guan Wei,
Du YingKui
Publication year - 2019
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.2959
Subject(s) - control theory (sociology) , adaptive control , actuator , controller (irrigation) , bounded function , fault tolerance , convergence (economics) , computer science , linear system , control engineering , engineering , control (management) , mathematics , distributed computing , artificial intelligence , mathematical analysis , agronomy , economics , biology , economic growth
Summary In this paper, the problem of fault‐tolerant insensitive control is addressed for a class of linear time‐invariant continuous‐time systems against bounded time‐varying actuator faults and controller gain variations. Adaptive mechanisms are developed to adjust controller gains in order to compensate for the detrimental effects of partial loss of control effectiveness and bias‐actuator faults. Variations of controller gains arise from time‐varying and bounded perturbations that are supposed to always exist in adaptive mechanisms. Based on the disturbed outputs of adaptive mechanisms, three different adaptive control strategies are constructed to achieve bounded stability results of the closed‐loop adaptive fault‐tolerant control systems in the presence of actuator faults and controller gain variations. Furthermore, comparisons of convergence boundaries of states and limits of control inputs among adaptive strategies are developed in this paper. The efficiency of the proposed adaptive control strategies and their comparisons are demonstrated by a rocket fairing structural‐acoustic model.