Actuator fault detection and compensation under feedback control

The problem of unknown input estimation and compensation is studied for actuated nonlinear systems with noisy measurements. The proposed solution is based on high-order sliding-mode differentiation and discrete-time optimization technique. Accuracy of the proposed hybrid estimation scheme is evaluat...

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Bibliographic Details
Published in:Automatica (Oxford) 2011-08, Vol.47 (8), p.1699-1705
Main Authors: Efimov, D., Zolghadri, A., Raïssi, T.
Format: Article
Language:English
Subjects:
Actuators
Aircraft
Applied sciences
Compensation
Computer science
control theory
systems
Control theory. Systems
Delay
Disturbance rejection
Dynamical systems
Exact sciences and technology
Failure detection
Fault detection
Input estimation
Modelling and identification
Optimization
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Summary:The problem of unknown input estimation and compensation is studied for actuated nonlinear systems with noisy measurements. The proposed solution is based on high-order sliding-mode differentiation and discrete-time optimization technique. Accuracy of the proposed hybrid estimation scheme is evaluated and stability conditions of the compensating mechanism are established. It is shown that the fault detection delay as well as the smallest detectable fault magnitude can be estimated. Efficiency of the proposed approach is demonstrated through oscillatory failure detection and compensation in aircraft surface servo loops.
ISSN:0005-1098
1873-2836
DOI:10.1016/j.automatica.2011.02.043