Abstract
This article shows the possibilities offered by the use of the power cepstrum for gear system vibratory diagnosis. A model of signals generated by an accelerometer sensor will be established on which the theoretical expression for the power cepstrum is partially calculated. This makes it possible to develop an indicator which is little affected by the signal amplitude, the signal-to-noise ratio, or the position of the sensor. It is shown that the use of a signal sampled vs. shaft angle enables the cepstrum to preserve its full resolution and allows the realisation of a synchronous average to isolate each meshing pair. Some applications of the monitoring procedure are presented.
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