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�������պ����ѧѧ�� 2004, Vol. 30 Issue (06) :524-528    DOI:
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1. �������պ����ѧ �Զ�����ѧ���������ѧԺ, ���� 100083;
2. �������պ����ѧ ��Դ�붯������ѧԺ, ���� 100083
DTW based quantitative fault diagnosis of gas path component in turbofan
Xu Bo1, Tang Hailong2, Li Xingshan1*
1. School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics�� Beijing 100083, China;
2. School of Jet Propulsion, Beijing University of Aeronautics and Astronautics�� Beijing 100083, China

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ժҪ �����һ�����ö�̬������Ϣ����·���Ͻ��ж�����ϵ��·���.���ö�̬ʱ�����(DTW, Dynamic Time Warping)����,�Զ�̬��������ͬ��֪�Ĺ���ģʽ���������Զ���,������÷������Ĺ���̬������Ϣ,ʵ���˷�������·�������ϵĶ������.�������:���ַ�����©���ʺ����ʵ�,���кܸߵ����׼ȷ��,�Բ���������������ȷ���Ծ��кܺõ�³����.
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Abstract�� A quantitative fault diagnosis method was presented based on pattern recognition principles for gas path component in turbofan. The method consists of a preprocessing step for multivariate dynamic data, where the magnitude dependent information is standardized, and a similarity assessment step via DTW (dynamic time warping). DTW is a flexible pattern matching method used in the area of speech recognition. The method was designed to classify faults independently of inconsistencies in the operating processes of turbofan ground test-runs. Quantitative diagnosis was fulfilled by the subdivision of fault pattern database according to the fault degree of gas path component. Case studies show that the method has a low false alarm rate and a high capability in isolating faults, and moreover, it is also robust with measuring noise and other uncertainties.
Keywords�� aircraft engines   fault diagnosis   dynamic process   dynamic time warping     
Received 2003-01-08;
About author: �� ��(1969-),��,����������,��ʿ��, xuboyt@sohu.com.
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�첨, �ƺ���, ������.����DTW�����ȷ�������·���϶�����Ϸ���[J]  �������պ����ѧѧ��, 2004,V30(06): 524-528
Xu Bo, Tang Hailong, Li Xingshan.DTW based quantitative fault diagnosis of gas path component in turbofan[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(06): 524-528
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2004/V30/I06/524
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