Wavelet envelope power spectrum for gear fault diagnosis and comparison of diagnostic capability of wavelets

摘要

The concept of vibration signal analysis using wavelet analysis has found lot of advancement in the area of fault diagnosis in machines. In this research work, the techniques for gear fault diagnosis using Morlet & modified Morlet wavelet are presented. Wavelet analysis has capacity to analyse the various features in the vibration signal. Realistic vibration signals in time domain, were collected in different operating condition from an experimental setup, developed for characterizing the realistic situation. Before the application of wavelet analysis to diagnose the fault in gears, the filtering of vibration signals was performed to enhance the signal components. The concept of enveloped power spectrum using both the Morlet and Modified Morlet are applied to diagnose the fault in gears in its incipient stage. The comparison of diagnostic capability of both type of Wavelets are presented for analysing their capability. The result shows the successful identification offault in gears.