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Proceedings Paper

Robust fault diagnosis for reaction flywheel based on reduced-order observer
Author(s): Min Wang; Shiyin Qin
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Paper Abstract

In this paper, a reduced-order observer is applied to fault diagnosis for reaction flywheels in satellite attitude control system. The benefit of this approach is able to estimate the fault signal of reaction flywheel in the presence of unknown inputs. Through ingenious state transformation, the original system is decomposed into two subsystems, one of which is driven by known inputs only. Thus, after a reduced-order observer being designed, the subsystem's accurate state estimation can be obtained without the effect of unknown inputs, consequently, the unknown inputs can be estimated. In this case the fault signals of reaction flywheels may come down to a part of unknown inputs, then the faults can be detected according to the estimated unknown inputs.

Paper Details

Date Published: 13 October 2008
PDF: 8 pages
Proc. SPIE 7129, Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration, 71292H (13 October 2008); doi: 10.1117/12.807474
Show Author Affiliations
Min Wang, Beijing Univ. of Aeronautics and Astronautics (China)
Shiyin Qin, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 7129:
Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration

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