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�������պ����ѧѧ�� 2012, Vol. 38 Issue (6) :772-777    DOI:
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ʯ����, ������, ����, ʷ��*
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Method of extended testability modeling for on-off multi-state system
Shi Junyou, Wang Fengwu, Zhang Xin, Shi Meng*
School of Reliability and Systems Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The existing methods for testability-modeling have some constraints, including the consistency of failure criterion, failure transmitting and logical-value criterion of test. Aiming at states differences of on-off multi-state system, the method of extended testability modeling was proposed. Failure, test, D matrix and diagnostic tree were defined extended with the introduction of states, and an extended testability model was defined also. The algorithms for extended testability modeling and analysis were described, which include modeling, generations of extended D matrix and extended diagnostic tree. A hydraulic control system was taken as an example for the engineering application, which shows that this method is feasible and effective.
Keywords�� testability   testability modeling   on-off multi-state system   extended modeling   extended D matrix   extended diagnostic tree     
Received 2011-03-10;
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ʯ����, ������, ����, ʷ��.ͨ��ʽ��̬ϵͳ��չ�����Խ�ģ����[J]  �������պ����ѧѧ��, 2012,V38(6): 772-777
Shi Junyou, Wang Fengwu, Zhang Xin, Shi Meng.Method of extended testability modeling for on-off multi-state system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2012,V38(6): 772-777
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2012/V38/I6/772
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