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2003 year, number 4

Wavelet analysis of impulse trains in vibroacoustic measurements

E.L.Shchukin and R.Yu.Zamaraev
Pages: 26–32


A method for evaluation of the frequency of impact impulse appearance and qualitative analysis of vibrosignal components is described. It is based on nonstandard wavelet transform. The method is compared with the Fourier transform and its capabilities, advantages, and drawbacks are evaluated. The method is used to analyze a real signal from a test machine with a defective rolling bearing. Analysis of the real signal leads to the conclusion that it is insufficient to consider real signals by analyzing only the Fourier spectrum.