Feature extraction of acoustic emission signals of cable damage based on wavelet packet analysis

DENG Yang;DING youliang;LI Aiqun

Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (6) : 154-158.

PDF(1891 KB)
PDF(1891 KB)
Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (6) : 154-158.
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Feature extraction of acoustic emission signals of cable damage based on wavelet packet analysis

  • DENG Yang; DING youliang; LI Aiqun
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Abstract

The simulation Analysis of feature extraction of acoustic emission signals for the damage of cables is presented on the basis of the combination of explicit finite element method and wavelet packet analysis. The wavelet packet energy spectrum is used to extract the features of acoustic emission signals, which are simulated by using the program of ANSYS/LS-DYNA. The feature extraction is discussed from the aspects of decomposition level, number of the selected feature bands and noise robustness of the feature parameters. The results show that (i) the wavelet packet energy spectrum can reflect the feature of the signals finely when proper decomposition level is chosen; (ii) only a minority of the feature bonds can make the wavelet packet energy spectrum reflect the feature information of acoustic emission signals; (iii) the feature parameters established based on wavelet packet energy spectrum indicate the preferable damage sensitivity and noise robusticity and the discrimination of various damage types can be realized with high levels of noise.

Key words

cable / Acoustic emission (AE) / wavelet packet / damage / feature extraction

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DENG Yang;DING youliang;LI Aiqun. Feature extraction of acoustic emission signals of cable damage based on wavelet packet analysis [J]. Journal of Vibration and Shock, 2010, 29(6): 154-158
PDF(1891 KB)

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