PRINCIPLES OF CONTROL OF THE TECHNICAL CONDITION OF MOVING MECHANISMS BASED ON ANALYSIS OF THE DYNAMICS OF VIBRATION BLURING AN IMAGE OF A ROUND MARK
The principles of solving the urgent problem of vibration diagnostics of hidden defects of aircraft engines are formulated by statistical analysis of the recorded sequence of values of the vibrational increment of the image area of the round mark. A description is given of a method for forming this sequence. The principles of checking the significance of the average sample value of the vibrational increment of the image area of the round mark as an invariant of the intensity of the vibrational movement of the informative point on the surface of the control object are developed. Areas of application and limitations of parametric and nonparametric statistical criteria are formulated that are used to test the significance of the difference from zero of the average value of a random variable. The principles of applying the inversion criterion to verify the experimental sequence of values of the vibrational increment of the image area of a round mark for the presence of a directed trend are formulated. Practical recommendations have been developed for monitoring the technical condition of moving mechanisms based on the results of this check. A description and analysis of the results of experimental studies is given, during which the techniques presented in the article were tested and their unique sensitivity to changes in the parameters of vibrational displacement was proved.