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�������պ����ѧѧ�� 2003, Vol. 29 Issue (1) :87-90    DOI:
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����, ���ؿ�, ���人*
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Early Rub��Impact Fault Diagnosis Based on Wavelet Packet Decomposition
Song You, Liu Zhongkan*
Dept. of Electronic Engineering, Beijing University of Aeronautics and Astronautics

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Abstract�� Rub-impact signal detection between rotor and stator is investigated. The features of no rub-impact and early rub-impact are analysed based on the wavelet packet decomposition, which is sensitive to the singularity of signal and able to offer a richer resolution in frequency band than wavelet decomposition. Results show that the wavelet packet decomposition can be used to detect rub-impact signal effectively, and the localization of rub-impact faults can be realized with the present method.
Keywords�� fault diagnosis   collisions   signal detection   wavelet packet decomposition     
Received 2001-11-01;
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����, ���ؿ�, ���人.����С�����ֽ��������Ħ��������о�[J]  �������պ����ѧѧ��, 2003,V29(1): 87-90
Song You, Liu Zhongkan.Early Rub��Impact Fault Diagnosis Based on Wavelet Packet Decomposition[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(1): 87-90
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