关键词: Wigner高阶谱, 故障诊断, 时频分析

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)