The Double Adaptive Wavelet partial Maximum Modulus Method and Its Application to Feature Extraction of Impulse Signal

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (1) : 53-59.

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The Double Adaptive Wavelet partial Maximum Modulus Method and Its Application to Feature Extraction of Impulse Signal

YU MingYue , CHEN Guo

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Abstract

The classic wavelet partial maximum modulus method is improved by the double adaptive lifting scheme. This method is used to extract features of impact signal in mechanical fault diagnosis, and obtain the impact features of the signal in the time domain and the frequency domain . The new method is used to extract rolling bearing weak impact features by comparison with the classic wavelet and original signal . The results show that double adaptive wavelet partial maximum modulus method is more effective in extraction impact signal and more insensitive to decomposition level than the classic wavelet methods . The new method will provide a new idea in impact type fault diagnosis.

Key words

double adaptive / lifting scheme / maximum modulus / impact signal / rolling bearing / feature extraction

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YU MingYue;CHEN Guo. The Double Adaptive Wavelet partial Maximum Modulus Method and Its Application to Feature Extraction of Impulse Signal[J]. Journal of Vibration and Shock, 2013, 32(1): 53-59