期刊
AEROSPACE SCIENCE AND TECHNOLOGY
卷 111, 期 -, 页码 -出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ast.2021.106565
关键词
Attitude tracking; Measurement noise; Sliding mode control; Disturbance observer; Fixed-time convergence; Chattering-free
资金
- National Natural Science Foundation of China [61873207]
The study proposes a method based on disturbance observer and sliding mode control to address the challenging attitude tracking problem of aircraft with external disturbance and sensor noises. This approach can estimate and suppress external disturbances, while ensuring the exponential stability of the system with no chattering.
The challenging attitude tracking control problem of aircraft with external disturbance and sensor noises is investigated. A disturbance observer-based control approach is presented. In this approach, a fixed-time disturbance observer is preliminarily developed. The external disturbance is estimated with the estimation error governed to zero after a fixed-time regardless of any initial state. Moreover, with measurement noises explicitly considered, a discrete tracking differentiator extracting the real signals from the polluted measurement is introduced into that fixed-time observer to improve its application potential. Invoking the estimation information, a sliding mode attitude controller is then synthesized. The main feature of the proposed approach is that the closed-loop attitude tracking system is guaranteed to be exponentially stable. External disturbance rejection is achieved, while its upper bound is not required to implement that approach. In contrast to the conventional sliding mode control schemes, the proposed controller is chattering-free. Numerical simulation and experimental tests are finally carried out to verify the effectiveness of the proposed approach. (C) 2021 Elsevier Masson SAS. All rights reserved.
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