A Semi-Supervision Fault Diagnosis Method Based on Attitude Information for a Satellite

The various faults that inevitably occur represent a primary issue in satellite on-orbit operation. Fault diagnosis is the first step in the fault control process. As a means to perform this step, a semi-supervision fault diagnosis method via attitude information is proposed for a satellite. This method combines static fusion with dynamic updating. The evidence concept is employed to obtain the fault information. It not only allows the detection of the slow change and failure with interference, but also confirms the optimal fusion and updating parameters via historical data. Numerical simulations, including static fusion diagnosis and dynamic updating diagnosis, are all presented with the proposed semi-supervision diagnosis methods to compare and prove the effectiveness of the proposed approach.