Research of Acoustic Emission Signal De-Noising Based on Lifting Wavelet Packet

X.J. Li; Z. Q. Deng; L. L. Jiang; P Li; K. F He

doi:10.4028/www.scientific.net/AMM.143-144.622

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 143-144Research of Acoustic Emission Signal De-Noising...

Research of Acoustic Emission Signal De-Noising Based on Lifting Wavelet Packet

Abstract:

Aiming at the extraction of failure character signal for early acoustic emission (AE) signals, a method to combine lifting wavelet packet with spectrum zoom technology is developed. Using lifting wavelet packet de-noising method, not only filters the noise signal, but also retains the feature information. After the signals de-noising, combining the envelope demodulation analysis with the spectrum zoom technology, which can effective extract the weak fault characteristic frequency The result of simulated signals and experimental signals shows that the proposed method has better noise reduction with a higher signal noise ratio (SNR) and lower mean square error (MSE), and it can successfully extract the fault characteristic frequency of rotating machinery early AE signals.

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Periodical:

Applied Mechanics and Materials (Volumes 143-144)

Pages:

622-626

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.143-144.622

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Online since:

December 2011

Authors:

X.J. Li, Z. Q. Deng, L. L. Jiang, P Li, K. F He

Keywords:

AE Signals, De-Noising, Lifting Wavelet Packet

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