Vibrational diagnostics and prediction of technical state of aviation turbine coolers

Transfer of aviation aggregates to exploitation according to their technical state anticipates exploitation until reaching the limit of their service life. For turbine coolers (TC) with bearings, usual signs of technical state (TS) considered are: concentration of metallic particles in lubrication oil, axial and radial gaps, vibrations, etc. This report considers bands of vibrational spectrum, which are maximally varied depending upon object´s operating age. Presented is a formal method of forming of vibration sign space. It is based on computer search of vibrational spectrum bands of several objects of one type (and with the same operating age as well). In such a way a “teaching process” was performed for spectral bands, which have maximal variation depending upon the object´s operating age. Results were extended to general objects´ population