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access icon free Integrated fault estimation and non-fragile fault-tolerant control design for uncertain Takagi–Sugeno fuzzy systems with actuator fault and sensor fault

© The Institution of Engineering and Technology
Received 14/09/2016, Accepted 11/03/2017, Revised 25/01/2017, Published 16/03/2017

This study proposes an integrated design of robust fault estimation and non-fragile fault-tolerant control for a class of Takagi–Sugeno fuzzy systems subjected to disturbances, actuator fault and sensor fault. A fuzzy adaptive observer is developed to achieve simultaneous estimations of actuator fault and sensor fault, based on which a new non-fragile output feedback fault-tolerant controller is constructed to compensate for the effects of the disturbances and faults. Moreover, the proposed fault-tolerant controller proves non-fragile, since it offers the ability to suppress the control gain perturbations. Simulation results are presented to illustrate the effectiveness of the proposed approach.

Inspec keywords: observers; feedback; fault diagnosis; perturbation techniques; fuzzy systems; control system synthesis; uncertain systems

Other keywords: fuzzy adaptive observer; uncertain Takagi-Sugeno fuzzy systems; integrated robust fault estimation; sensor fault estimation; control gain perturbation suppression; non fragile output feedback fault-tolerant controller; actuator fault estimation; non fragile fault-tolerant control design

Subjects: Simulation, modelling and identification; Fuzzy control; Control system analysis and synthesis methods; Combinatorial mathematics

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