An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform
The Empirical Wavelet Transform (EWT), which has a reliable mathematical derivation process and can adaptively decompose signals, has been widely used in mechanical applications, EEG, seismic detection and other fields. However, the EWT still faces the problem of how to optimally divide the Fourier...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-02-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/21/2/135 |
| _version_ | 1811301860087169024 |
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| author | Zezhong Feng Jun Ma Xiaodong Wang Jiande Wu Chengjiang Zhou |
| author_facet | Zezhong Feng Jun Ma Xiaodong Wang Jiande Wu Chengjiang Zhou |
| author_sort | Zezhong Feng |
| collection | DOAJ |
| description | The Empirical Wavelet Transform (EWT), which has a reliable mathematical derivation process and can adaptively decompose signals, has been widely used in mechanical applications, EEG, seismic detection and other fields. However, the EWT still faces the problem of how to optimally divide the Fourier spectrum during the application process. When there is noise interference in the analyzed signal, the parameterless scale-space histogram method will divide the spectrum into a variety of narrow bands, which will weaken or even fail to extract the fault modulation information. To accurately determine the optimal resonant demodulation frequency band, this paper proposes a method for applying Adaptive Average Spectral Negentropy (AASN) to EWT analysis (AEWT): Firstly, the spectrum is segmented by the parameterless clustering scale-space histogram method to obtain the corresponding empirical mode. Then, by comprehensively considering the Average Spectral Negentropy (ASN) index and correlation coefficient index on each mode, the correlation coefficient is used to adjust the ASN value of each mode, and the IMF with the highest value is used as the center frequency band of the fault information. Finally, a new resonant frequency band is reconstructed for the envelope demodulation analysis. The experimental results of different background noise intensities show that the proposed method can effectively detect the repetitive transients in the signal. |
| first_indexed | 2024-04-13T07:17:42Z |
| format | Article |
| id | doaj.art-28c86d13e2254e519910a05c117cac08 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-13T07:17:42Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-28c86d13e2254e519910a05c117cac082022-12-22T02:56:43ZengMDPI AGEntropy1099-43002019-02-0121213510.3390/e21020135e21020135An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet TransformZezhong Feng0Jun Ma1Xiaodong Wang2Jiande Wu3Chengjiang Zhou4Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, ChinaThe Empirical Wavelet Transform (EWT), which has a reliable mathematical derivation process and can adaptively decompose signals, has been widely used in mechanical applications, EEG, seismic detection and other fields. However, the EWT still faces the problem of how to optimally divide the Fourier spectrum during the application process. When there is noise interference in the analyzed signal, the parameterless scale-space histogram method will divide the spectrum into a variety of narrow bands, which will weaken or even fail to extract the fault modulation information. To accurately determine the optimal resonant demodulation frequency band, this paper proposes a method for applying Adaptive Average Spectral Negentropy (AASN) to EWT analysis (AEWT): Firstly, the spectrum is segmented by the parameterless clustering scale-space histogram method to obtain the corresponding empirical mode. Then, by comprehensively considering the Average Spectral Negentropy (ASN) index and correlation coefficient index on each mode, the correlation coefficient is used to adjust the ASN value of each mode, and the IMF with the highest value is used as the center frequency band of the fault information. Finally, a new resonant frequency band is reconstructed for the envelope demodulation analysis. The experimental results of different background noise intensities show that the proposed method can effectively detect the repetitive transients in the signal.https://www.mdpi.com/1099-4300/21/2/135empirical wavelet transformscale-space histogramspectral negentropycorrelation coefficientrotating machinery |
| spellingShingle | Zezhong Feng Jun Ma Xiaodong Wang Jiande Wu Chengjiang Zhou An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform Entropy empirical wavelet transform scale-space histogram spectral negentropy correlation coefficient rotating machinery |
| title | An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform |
| title_full | An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform |
| title_fullStr | An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform |
| title_full_unstemmed | An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform |
| title_short | An Optimal Resonant Frequency Band Feature Extraction Method Based on Empirical Wavelet Transform |
| title_sort | optimal resonant frequency band feature extraction method based on empirical wavelet transform |
| topic | empirical wavelet transform scale-space histogram spectral negentropy correlation coefficient rotating machinery |
| url | https://www.mdpi.com/1099-4300/21/2/135 |
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