Applications of Wigner high order spectra in feature extraction of acoustic emission signals |
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| Authors: | Xiao Siwen Liao Chuanjun Li Xuejun |
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| Affiliation: | 1. Key Lab of Health Maintenance for Mechanical Equipment of Hunan Province;Hunan Science and Technology University;Xiangtan;Hunan 411201;China;2. Department of Precision Instruments;Tsinghua University;Beijing 100084;China |
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| Abstract: | The characteristics of typical AE signals initiated by mechanical component damages are analyzed. Based on the extracting principle of acoustic emission(AE) signals from damaged components,the paper introduces Wigner high-order spectra to the field of feature extraction and fault diagnosis of AE signals. Some main performances of Wigner binary spectra,Wigner triple spectra and Wigner-Ville distribution (WVD) are discussed,including of time-frequency resolution,energy accumulation,reduction of crossing items... |
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| Keywords: | acoustic emission Wigner spectra Wigner binary spectra Wigner triple spectra feature extraction rolling bearing |
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