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Sensor fault-tolerant observer applied in satellite attitude control

Wei, Jiaolong , Cen, Zhaohui , & Jiang, Rui (2012) Sensor fault-tolerant observer applied in satellite attitude control. Journal of Systems Engineering and Electronics, 23(1), pp. 99-107.

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Abstract

The observing failure and feedback instability might happen when the partial sensors of a satellite attitude control system (SACS) go wrong. A fault diagnosis and isolation (FDI) method based on a fault observer is introduced to detect and isolate the fault sensor at first. Based on the FDI result, the object system state-space equation is transformed and divided into a corresponsive triangular canonical form to decouple the normal subsystem from the fault subsystem. And then the KX fault-tolerant observers of the system in different modes are designed and embedded into online monitoring. The outputs of all KX fault-tolerant observers are selected by the control switch process. That can make sense that the SACS is part-observed and in stable when the partial sensors break down. Simulation results demonstrate the effectiveness and superiority of the proposed method.

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ID Code: 49608
Item Type: Journal Article
Keywords: triangular canonical form, KX observer, satellite attitude control, integrity in closed-loop
ISSN: 1004-4132
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > AEROSPACE ENGINEERING (090100) > Satellite Space Vehicle and Missile Design and Testing (090108)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Research Centres > Smart Transport Research Centre
Copyright Owner: Copyright 2012 Journal of Systems Engineering and Electronics
Deposited On: 18 Apr 2012 09:27
Last Modified: 21 Oct 2012 19:13

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