Method for automatic fault diagnosis of satellite and diagnostic system thereof

A fault diagnosis system and fault diagnosis technology, which are applied in the fields of space navigation equipment, space navigation aircraft, and space space vehicle observation, etc., can solve the problems of large time delay, high false alarm, and inaccurate division of periodic fault signals. , to achieve the effect of reducing the false alarm rate and the false alarm rate
CN101590918AInactive Publication Date: 2009-12-02SHANGHAI ENG CENT FOR MICROSATELLITES
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI ENG CENT FOR MICROSATELLITES
Publication Date
2009-12-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for automatic fault diagnosis of a satellite and a diagnostic system thereof. The method comprises the following steps: dividing the satellite fault into a component level fault, a subsystem level fault and a system level fault; adopting a fault detection method based on a fuzzy set to fuzzify a precise sensor sampling value; defining different alarm weight values for fuzzy subset based on the membership grade belonging to each fuzzy subset; and determining whether to alarm or not by calculating the relation between the summation of the alarm weight values in a time window and an alarm threshold value. The method can effectively overcome the defects of a common fault detection method and effectively reduce the false alarm rate and the rate of missing report; and when certain fault is caused by a plurality of sub-faults, the method performs heuristic search according to the reliability of a system corresponding to each sub-fault and searches a sub-fault node corresponding to a system with low reliability preferentially. Besides, in order to adapt to the synergistic diagnosis between distributed satellites in the future, a synergistic interface is designed to provide diagnosis services for other satellites, thus the aim of the invention is achieved.
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Description

technical field

[0001] The invention relates to a spacecraft fault diagnosis method and a diagnostic system thereof, in particular to a satellite autonomous fault diagnosis method and a diagnostic system for autonomously performing fault diagnosis according to real-time telemetry parameter messages. Background technique

[0002] The development trend of autonomous intelligent control of satellites and autonomous operation of distributed satellites requires the spacecraft to have the functions of autonomously sensing its own health status and autonomous fault diagnosis. However, at the present stage, my country's spacecraft faults mainly rely on the ground measurement and control station for diagnosis, which limits the fault diagnosis of satellites to the location of the ground measurement and control station and the measurement and control arc, and also brings great difficulties to the measurement and control personnel of the ground measurement and control station. Judge stre...

Claims

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