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Integrated design of robust fault estimation and fault‐tolerant control against simultaneous actuator and sensor faults
Author(s) -
Mu Yunfei,
Zhang Huaguang,
Zhang Kun,
Ren He
Publication year - 2021
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.2201
Subject(s) - control theory (sociology) , actuator , observer (physics) , fault tolerance , control engineering , fault (geology) , engineering , fault detection and isolation , controller (irrigation) , computer science , control (management) , reliability engineering , artificial intelligence , agronomy , physics , electrical engineering , quantum mechanics , seismology , biology , geology
This paper investigates the problems of simultaneous actuator and sensor faults estimation, as well as the fault‐tolerant control scheme for a class of linear continuous‐time systems subject to external disturbances. First, the original system is transformed into a singular form by extending the actuator fault and sensor fault to be parts of the new state. Then, a new estimation technique named non‐fragile proportional‐derivative observer is designed for the singular system to achieve simultaneous estimations of states and faults. With the obtained estimations information, an integrated design of the non‐fragile output feedback fault‐tolerant controller is explored to compensate for the effect of faults by stabilizing the closed‐loop system. Finally, a simulation study on a two‐stage chemical reactor with recycle streams is provided to verify the effectiveness of the proposed approach.