METHOD FOR VIBRATION DIAGNOSTICS OF THE OCCURRENCE OF INCIPIENT DEFECTS IN INDIVIDUAL NODES OF MECHANISMS Russian patent published in 2022 - IPC G01M13/04 

FIELD: diagnostic technique.

SUBSTANCE: invention relates to vibration diagnostics of mechanisms and can be applied to vibration diagnostics of auxiliary ship mechanisms (bearings, pumps, electric motors and other rotary mechanisms). According to this method, bandpass filtering of vibration accelerations is performed in the high-frequency region, excluding the mutual influence of vibroacoustic signals of neighboring nodes of the mechanism. At the training stage, standards of classification features are built: locations on the frequency axis and amplitude values of significant maxima identified in the averaged energy spectra of vibrational acceleration envelopes. For each diagnosed node of the mechanism, only for their serviceable state in the form of probabilistic boundaries of changes in these signs by integrating multidimensional probability densities of these signs. At the stage of vibration diagnostics, classification features selected in the averaged energy spectrum are compared: locations on the frequency axis and amplitude values of significant maxima with standards of serviceable states for each diagnosed node of the mechanism and it is determined whether these features are within the probabilistic boundaries established at the training stage. When the signs go beyond the probabilistic boundaries, the occurrence of incipient defects in a certain node of the mechanism is established.

EFFECT: identifying the occurrence of incipient defects in individual previously serviceable nodes of mechanisms (without recognizing the type of these defects).

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