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Fault-tolerant control of hypersonic vehicles based on fast fault observer under actuator gain loss fault or stuck fault

Published online by Cambridge University Press:  09 March 2020

P. Zhu Open the ORCID record for P. Zhu [Opens in a new window] ,
J. Jiang  and
C. Yu
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Abstract

This paper proposes a fault-tolerant control (FTC) method based on fast fault observer (FFO) to solve the problem of actuator gain loss fault and stuck fault for hypersonic vehicles. Firstly, an input-output feedback linearisation model is presented that considers parametric uncertainties, control input saturation, disturbances and actuator faults. Secondly, the above factors are defined as an integrated fault item, and an improved fast fault observer is designed to estimate the integrated fault in real time. Finally, the fault-tolerant controller is constructed based on the sliding mode and fault estimation. In case of unknown faults, the effects of gain loss fault or stuck fault happen on elevators and the engine can be quickly processed, Also, the asymptotically stable tracking of the flight output reference command is completed to achieve fault-tolerant control. The final simulation experiment verifies the effectiveness of the proposed method.

Keywords

Hypersonic vehicleActuator gain loss faultStuck faultFast fault observerFault-tolerant control
Type
Research Article
Information
The Aeronautical Journal , Volume 124 , Issue 1278 , August 2020 , pp. 1190 - 1207
Copyright
© The Author(s) 2020. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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