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�������պ����ѧѧ�� 2005, Vol. 31 Issue (01) :60-62    DOI:
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���1, ������1, ����1, ����2*
1. �������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100083;
2. �й��ռ似���о�Ժ?�������̲�, ���� 100029
Design on inference engine of the spacecraft thermal fault diagnosis expert system
Wei Chuanfeng1, Li Yunze1, Wang Jun1, Yu Tao2*
1. School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. China Academy of Space Technology Environment Engineering Dept., Beijing 100029, China

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Abstract�� When a spacecraft is on mission, various unpredictable faults often occur. It is very important that spacecrafts should be capable of diagnosing thermal faults automatically because most of them are difficult to be repaired on orbit, which requires a credible inference engine. And many rules and cases for fault diagnosis can be obtained after the spacecraft thermal test fault analysis. Those cases are difficult to describe in exact rules, but they are the most important experience in the spacecraft test. Combined with the rule-based reasoning and the case-based reasoning, the hybrid inference engine was produced, and the corresponding conflict resolutions were given. In rule-based reasoning, similarity judgement is used to resolve the conflict, and the numerical method differs from the non- numerical one. In case-based reasoning, the method of priority, ranking and credibility can be used; and the method of ranking is preferred to resolve the conflict if the number of all the cases is little.
Keywords�� spacecraft   fault diagnosis   expert system   inference engine     
Received 2003-08-18;


About author: κ����(1976-),��,ɽ��������,��ʿ��, chfwei@163.com.
κ����, ������, ����, ����.�������ȹ������ר��ϵͳ����������[J]  �������պ����ѧѧ��, 2005,V31(01): 60-62
Wei Chuanfeng, Li Yunze, Wang Jun, Yu Tao.Design on inference engine of the spacecraft thermal fault diagnosis expert system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2005,V31(01): 60-62
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2005/V31/I01/60
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