Robust actuator fault estimation combining unknown input observer and invariant set approach

2017 ◽  
Author(s):  
Junbo Tan ◽  
Bin Liang ◽  
Xueqian Wang
Keyword(s):  
Invariant Set ◽  
Fault Estimation ◽  
Unknown Input ◽  
Actuator Fault ◽  
Unknown Input Observer

scholarly journals Active fault tolerance control of a wind turbine system using an unknown input observer with an actuator fault

2018 ◽  
Vol 28 (1) ◽  
pp. 69-81 ◽  
Author(s):  
Shanzhi Li ◽  
Haoping Wang ◽  
Abdel Aitouche ◽  
Yang Tian ◽  
Nicolai Christov
Keyword(s):  
Wind Turbine ◽  
Active Fault ◽  
Fault Tolerant ◽  
Lyapunov Theory ◽  
Fault Estimation ◽  
Linear Matrix ◽  
Unknown Input ◽  
Actuator Fault ◽  
Unknown Input Observer ◽  
Wind Turbine System

AbstractThis paper proposes a fault tolerant control scheme based on an unknown input observer for a wind turbine system subject to an actuator fault and disturbance. Firstly, an unknown input observer for state estimation and fault detection using a linear parameter varying model is developed. By solving linear matrix inequalities (LMIs) and linear matrix equalities (LMEs), the gains of the unknown input observer are obtained. The convergence of the unknown input observer is also analysed with Lyapunov theory. Secondly, using fault estimation, an active fault tolerant controller is applied to a wind turbine system. Finally, a simulation of a wind turbine benchmark with an actuator fault is tested for the proposed method. The simulation results indicate that the proposed FTC scheme is efficient.

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