MACHINE FAULT DIAGNOSTICS BASED ON WIGNER-VILLE HIGH-ORDER SPECTRA

Abstract

Abstract: The Wigner higherorder moment spectra (WHOS), which are the extensions of the Wigner-Ville distribution (WVD) to higher-order moment spectra domains, can describe the higher-order moment spectral characteristics from the time domain and the frequency domain simultaneously. WHOS is a powerful tool for time-varying non-gauss analysis. WHOS to the machine fault diagnostics has been introduced, and how to remove cross-terms and suppress the gauss noise is stuelied. The simula- tion and experiment results show that the method is very effect- tive. Some valuable conclusions are obtained.

Key words: Fault diagnostics, Time-frequency analysis, Wigner higher order moment spectra (WHOS)

CLC Number:

TH165.3 TN911.7 TP206.3

Li Zhinong;He Yongyong;Chu Fulei. MACHINE FAULT DIAGNOSTICS BASED ON WIGNER-VILLE HIGH-ORDER SPECTRA[J]. , 2005, 41(4): 119-122.

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MACHINE FAULT DIAGNOSTICS BASED ON WIGNER-VILLE HIGH-ORDER SPECTRA

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