Volume 29 Issue 9
Sep.  2003
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Li Baoan, Li Xingshan, Liu Xinget al. Research on feature extraction of impulse signal using Walsh transform[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(9): 802-806. (in Chinese)
Citation: Li Baoan, Li Xingshan, Liu Xinget al. Research on feature extraction of impulse signal using Walsh transform[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(9): 802-806. (in Chinese)

Research on feature extraction of impulse signal using Walsh transform

  • Received Date: 10 Jul 2002
  • Publish Date: 30 Sep 2003
  • Compared with Fourier transform, the amplitude of the impulse signal power spectrum of Walsh transform was larger than that of Fourier transform, and the calculation speed of Walsh transform was faster. Wavelet packet analysis could reduce noise of the signal and filter unnecessary signals and characterization of fault signal was put forward. With Walsh transform and wavelet packet analysis, characterization of fault better could be obtained. Bearing vibration signal included fault frequency features when rolling bearing had fault. The Walsh power spectrum of the rolling bearing with fault signal was calculated by using the Walsh transform and discussed for bearing fault diagnosis. Both simulation and testing results indicate that Walsh transform and wavelet packet analysis are effective method in the diagnosis of bearing various faults.

     

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