Volume 36, Number 5, October 2018
|Page(s)||978 - 987|
|Published online||17 December 2018|
Backstepping Fault-Tolerant Control for Unmanned Thrust-Vectoring Aircraft Based on Sliding-Mode Observer
Postgraduate College, Air Force Engineering University, Xi’an
2 Aeronautics Engineering College, Air Force Engineering University, Xi’an 710038, China
In this paper, a backstepping fault-tolerant control based on sliding-mode observer is proposed for the unmanned thrust-vectoring aircraft (UTVA) control. First, the UTVA model with the uncertainty, control surface damage and actuator faults is described, which is divided into fast loop and slow loop. Next, the cascade observers including a high-order SMO and the discontinuous projection adaptive law are proposed to estimate the states with compensating the uncertainty and control surface damage, and the sliding-mode observer is designed to identify actuator faults and estimate fault parameters. Then, the backstepping fault-tolerant control combining the estimation of states and fault parameters is proposed to achieve the global fault-tolerant control, which compensates the uncertainty, control surface damage and actuator faults. Finally, simulation results are given to demonstrate the effectiveness for UTVA.
Key words: UTVA / actuator fault / control surface damage / cascade observer / sliding-mode observer / backstepping fault-tolerant control
关键字 : 无人推力矢量飞机 / 执行器故障 / 舵面故障 / 级联观测器 / 滑模观测器 / 反步容错控制
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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