EXTRACTION OF SHOCK CHARACTER FROM HARMONIC SIGNAL BASED ON WAVELET

Yang Jianguo; Xia Songbo; Xu Genfa

Volume 14 Issue 4

Oct. 1999

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Yang Jianguo, Xia Songbo, Xu Genfa. EXTRACTION OF SHOCK CHARACTER FROM HARMONIC SIGNAL BASED ON WAVELET[J]. Journal of Aerospace Power, 1999, 14(4): 343-347.

Citation:

Yang Jianguo, Xia Songbo, Xu Genfa. EXTRACTION OF SHOCK CHARACTER FROM HARMONIC SIGNAL BASED ON WAVELET[J]. Journal of Aerospace Power, 1999, 14(4): 343-347.

Yang Jianguo, Xia Songbo, Xu Genfa. EXTRACTION OF SHOCK CHARACTER FROM HARMONIC SIGNAL BASED ON WAVELET[J]. Journal of Aerospace Power, 1999, 14(4): 343-347.

Citation:

Yang Jianguo, Xia Songbo, Xu Genfa. EXTRACTION OF SHOCK CHARACTER FROM HARMONIC SIGNAL BASED ON WAVELET[J]. Journal of Aerospace Power, 1999, 14(4): 343-347.

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EXTRACTION OF SHOCK CHARACTER FROM HARMONIC SIGNAL BASED ON WAVELET

2nd Dept.Harbin Institute of Technology,Harbin 150001

Received Date: 1998-11-01
Rev Recd Date: 1999-03-01
Publish Date: 1999-10-28

Abstract

Abstract

Wavelet transformation has very good characteristics of time-frequency analysis,and is very effective to extract the small instantaneous shock from harmonic signal.An improved fast algorithm is proposed to avoid frequency aliasing,which exists in the Mallat algorithm.The incipient fault character of the bearing in one aeroengine is extracted successfully by the wavelet transformations.
- Transformation,
- Signal,
- Fault diagnosis