Robust fault diagnosis for reaction flywheel based on reduced-order observer

Min Wang; Shiyin Qin

doi:10.1117/12.807474

13 October 2008 Robust fault diagnosis for reaction flywheel based on reduced-order observer

Min Wang, Shiyin Qin

Proceedings Volume 7129, Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration; 71292H (2008) https://doi.org/10.1117/12.807474
Event: Seventh International Symposium on Instrumentation and Control Technology, 2008, Beijing, China

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.

Citation Download Citation

Min Wang and Shiyin Qin "Robust fault diagnosis for reaction flywheel based on reduced-order observer", 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); https://doi.org/10.1117/12.807474

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