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Observer‐based fault‐tolerant control of hypersonic scramjet vehicles in the presence of actuator faults and saturation
Author(s) -
Mu Lingxia,
Li Leyao,
Yu Xiang,
Zhang Youmin,
Li Ping,
Wang Xinmin
Publication year - 2017
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.4004
Subject(s) - control theory (sociology) , actuator , lyapunov function , observer (physics) , scramjet , linear matrix inequality , fault tolerance , hypersonic speed , saturation (graph theory) , computer science , hypersonic flight , engineering , control engineering , nonlinear system , control (management) , mathematics , physics , mathematical optimization , aerospace engineering , artificial intelligence , combustor , distributed computing , chemistry , organic chemistry , quantum mechanics , combinatorics , combustion
Summary An adaptive sliding mode observer (SMO)–based fault‐tolerant control method taking into consideration of actuator saturation is proposed for a hypersonic scramjet vehicle (HSV) under a class of time‐varying actuator faults. The SMO is designed to robustly estimate the HSV states and reconstruct the fault signals. The adaptive technique is integrated into the SMO to approximate the unknown bounds of system uncertainties, actuator faults, and estimation errors. The robust SMO synthesis condition, which can be formulated as a set of linear matrix inequalities, is improved by relaxing structure constraints to the Lyapunov matrix. An anti‐windup feedback control law, which utilizes the estimated HSV states and the fault signals, is designed to counteract the negative effects of actuator saturation induced by actuator faults. Simulation results demonstrate that the proposed approach can guarantee stability and maintain L 2 performance of the closed‐loop system in the presence of HSV actuator faults and saturation.