Envelope Analysis Based on the Combination of Morlet Wavelet and Kurtogram

Abstract:

Envelope analysis based on the combination of complex Morlet wavelet and Kurtogram have advantages of automatic calculation of the center frequency and bandwidth of required band-pass filter. However, there are some drawbacks in the traditional algorithm, which include that the filter bandwidth is not -3dB bandwidth and the analysis frequency band covered by the filter-banks are inconsistent at different levels. A new algorithm is introduced in this paper. Through it, both optimal center frequency and bandwidth of band-pass filter in the envelop analysis can be obtained adaptively. Meanwhile, it ensures that the filters in the filter-banks are overlapped at the point of -3dB bandwidth and the consistency of frequency band that the filter-banks covered.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 305-308
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.305
• Online since: March 2012
• Authors: Yu Liang, Yu Guo, Chuan Hui Wu, Yan Gao
• Keywords: Envelope Analysis, Rolling Element Bearing, Spectral Kurtosis, Wavelet

References

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