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Actuator fault modeling and fault-tolerant tracking control of multi-vectored propeller aerostat

Published online by Cambridge University Press:  11 April 2022

L. Chen*
Affiliation:
School of Air Transportation, Shanghai University of Engineering Science, Shanghai201620, China
Q. Dong
Affiliation:
Teaching and Research Center, Mudanjiang Medical University, Mudanjiang, P.R. China
Z.R. Yan
Affiliation:
School of Air Transportation, Shanghai University of Engineering Science, Shanghai201620, China
J.G. Liu
Affiliation:
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang110016, China
*
*Corresponding author. Email: [email protected]

Abstract

For a multi-vectored propeller aerostat with actuator faults, this study presents a fault-tolerant tracking control strategy, which includes fault modeling, observer, force estimation and tracking controller. Fault modeling considers the four types of faults of vectored propellers, namely, thrust offset, thrust efficiency loss, vectored angle offset and vectored angle stuck. Actuator faults can be determined from the fault observer, which identifies the thrust offset from the acceleration difference of the faulty aerostat with the ideal model. For tracking positions, a traditional PID controller is constructed with virtual control, compensated with the estimated fault force. The control allocation scheme is proposed to redistribute the available actuators in case faults occur. Simulation results of position tracking prove the effectiveness of the proposed strategy.

Type
Research Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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