Evaluation of Peak Values of the Oscillation Processes Parameters

Abstract

Estimation of machinery health, identification of defects and deviations of dynamic mechanical and technological equipment, formation and determination of parameters and criteria of technical condition are based on the measurement of parameters of oscillatory processes. As a rule, as a source of information vibroacoustic oscillatory processes are used. Such processes are characteristic both for vibroacoustic-based diagnostics, and for acoustic-emission control. Many state evaluation criteria are based on the measurement of process peak parameters. Given the random nature of the processes, estimating the measurement error and determining the peak values of signals becomes an urgent task. The task of the given work is presentation of methodical bases of estimation of measurement error and determination of peak values of vibroacoustic signals taking into account laws of distribution of their instantaneous values. In particular, the paper presents a solution to the problem of determining the dependence of the asymptotic error estimate of the sample quantile on the value of discrete values in the sample (time realization of the signal). This allows us to justify and verify the metrology of measuring instruments. Besides it allows to estimate reliability of measurements of peak values of the vibroacoustic signal.