The fault diagnosis method of rolling bearing based on wavelet packet transform and zooming envelope analysis
ST Wan, LY Lv - … Conference on Wavelet Analysis and Pattern …, 2007 - ieeexplore.ieee.org
ST Wan, LY Lv
2007 International Conference on Wavelet Analysis and Pattern …, 2007•ieeexplore.ieee.orgThe fault of rolling bearing is one of familiar faults in rotaries. In accordance with the defects
of traditional envelope analysis to specify the resonant frequency band manually, a new fault
diagnosis method based on wavelet packet transform and zooming envelope analysis is
proposed. Firstly, the modulated frequency of resonant frequency band is extracted for
rolling bearing, and the original signal is reconstructed and the other interfering signals are
filtered based on wavelet packet transform. Secondly, the recomposed signal is …
of traditional envelope analysis to specify the resonant frequency band manually, a new fault
diagnosis method based on wavelet packet transform and zooming envelope analysis is
proposed. Firstly, the modulated frequency of resonant frequency band is extracted for
rolling bearing, and the original signal is reconstructed and the other interfering signals are
filtered based on wavelet packet transform. Secondly, the recomposed signal is …
The fault of rolling bearing is one of familiar faults in rotaries. In accordance with the defects of traditional envelope analysis to specify the resonant frequency band manually, a new fault diagnosis method based on wavelet packet transform and zooming envelope analysis is proposed. Firstly, the modulated frequency of resonant frequency band is extracted for rolling bearing, and the original signal is reconstructed and the other interfering signals are filtered based on wavelet packet transform. Secondly, the recomposed signal is demodulated by Hilbert transform, the high-frequency natural vibration is removed and the envelope signal can be obtained. Thirdly, in order to improve frequency precision of the envelope signal, the FFT-FS spectrum zooming method is proposed also. Finally, the fault vibration of a type 6350 rolling bearing installed on ADBE-56-N4 electric machine is measured in the laboratory to verify the theoretical analysis presented above.
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