包络分析方法及其在齿轮故障振动诊断中的应用

Envelope Analysis Technique and Its Application in the Gear Failure Vibration Diagnosis

通过理论分析和实际工程应用分别讨论了两种常用的齿轮振动包络分析方法，将细化技术融于希尔伯特变换解调及窄带解调之中，以提高解调频谱的频率分辨力。

The gear failure vibration diagnosiS in a gearbox is of great importance in manyfields.Through theoretical analysis and engineering application,two methods of gear vibration en-velope analysis technique are discussed in this paper.Zoom Hilbert transform en velope and zcomnarrow-band en velope are formed by applying zoom technique to Hilbert transform demodulationand narrow-band demodulation in order to increase the frequency resolution of demodulation spec-trum.