Sime-qualitative method for the onboard fault diagnosis of spacecraft propulsion systems
- Paper number
IAC-11,C4,3,20,x10926
- Author
Mr. Zheng Yan, College of Aerospace and Materials Engineering, National University of Defense Technology, China
- Coauthor
Mr. Xiaohui Peng, College of Aerospace and Materials Engineering, National University of Defense Technology, China
- Coauthor
Dr. Yuqiang Cheng, College of Aerospace and Materials Engineering, National University of Defense Technology, China
- Coauthor
Dr. Jianjun Wu, National University of Defense Technology, China
- Year
2011
- Abstract
Spacecraft propulsion systems are growing in complexity and sophistication as human beings embark on more ambitious space ventures. It is critical to diagnose accurately and recover in case of errors, and continue on to achieve our mission goals. The qualitative and semi-qualitative fault diagnostic methods are studied in the paper, aimed at the onboard fault diagnosis of spacecraft propulsion systems. Firstly, fault modes of spacecraft propulsion systems in the process of orbit maneuver and attitude control are summarized. Secondly, the modeling and analytical methods based on Signed Directed Graph (SDG) are investigated along with SDG-based diagnostic strategies. Then, the SDG models of a certain unified propulsion system (UPS) are built up. Thirdly, the SDG-based methods are modified by integrating quantitative information of the system components' governing equations into the corresponding branches of SDG, in order to improve the accurateness of qualitative diagnosis. The method has been applied to the artificial telemetry data that simulate the malfunction of thrusters in orbit maneuver of a UPS, and the effectiveness of the method has been confirmed. The method proposed can provide important practical value not only for the development of on-board fault diagnosis and isolation system of spacecraft propulsion systems, but also for the development of autonomous control systems of spacecrafts.
- Abstract document
- Manuscript document
IAC-11,C4,3,19,x10926.pdf (🔒 authorized access only).
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