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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
simulation and experiment results show that the method is very effect-
tive. Some valuable conclusions are obtained.
Key words: Wigner higher order moment spectra (WHOS) Fault diagnostics
Time-frequency analysis
CLC No: TH165.3
TN911.7 TP206.3
中国博士后基金(20040350061)、国家自然科学基金(50105007)、国家杰出青年科学基金(50425516)和教育部“跨世纪优秀人才培养计划”基金资助项目.
Received 20040715, received in revised form 20041214
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