Analysis of rotary mechanism fault features on the base of the spectral structure for vibration stochastic recurrence

The result of the application of the spectral methods for searching and analysis of the hidden periodicities in the properties of the vibration signals of the rotary machinery which allow to discover the spectral band of the vibration periodical non-stationarity, to determine the spectrum forms, to evaluate the power of their time variation. The typical peculiarities of the defects are established on this basis, the new diagnostic indicators are formed for their detection and typification.