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Observer‐Based Adaptive Output Feedback Fault Tolerant Control for Nonlinear Hydro‐Turbine Governing System with State Delay
Author(s) -
Yi Yapeng,
Chen Diyi,
Li Huanhuan,
Li Chaoshun,
Zhou Jianzhong
Publication year - 2020
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.1859
Subject(s) - control theory (sociology) , observer (physics) , nonlinear system , control engineering , lyapunov function , controller (irrigation) , actuator , state observer , fault (geology) , servomotor , computer science , adaptive control , fault tolerance , engineering , control (management) , distributed computing , geology , agronomy , physics , quantum mechanics , artificial intelligence , seismology , biology
This paper focuses on the problem of adaptive output feedback fault tolerant control for a nonlinear hydro‐turbine governing system. A dynamic mathematical model of the system is established, which aims to investigate the dynamic performance of the model under servomotor delay and actuator faults. Then, a fault estimation adaptive observer is proposed to achieve online real‐time diagnosis of system faults. Based on the online fault estimation information, an observer‐based adaptive output feedback fault tolerant controller is designed. Furthermore, under reasonable assumptions, the results demonstrate that the closed‐loop control system can achieve global asymptotic stability by Lyapunov function. Finally, the numerical simulation results are presented to indicate the satisfaction control effectiveness of the proposed scheme.