METHODS OF PLANNING TESTS OF SAMPLES OF EQUIPMENT OF WATER TRANSPORT VEHICLES FOR FAILURELESSNESS

Abstract

Mathematical test models are analyzed, which is a ratio to determine the probability of hitting from the origin at any achievable point, taking into account the forms of areas of compliance and non-compliance of controlled indicators of failure to the established requirements; ratios to determine the magnitude of consumer risk, the average duration of the test and so on.

The developed mathematical models of tests of samples of equipment of water transport equipment (FTA) for failure generalize the known models of tests of technical objects on reliability indicators of type "probability" and "operating time", and, unlike models of consecutive tests without a priori information and models of one-stage tests. using the Bayesian approach to accounting for a priori information, describe the process of closed tests of any type for reliability using the Bayesian approach to accounting for a priori information on the value of failure rates accumulated according to the controlled operation of FTA equipment samples.

These models are further used to substantiate the parameters of test plans for samples of FTA equipment in order to decide on compliance (non-compliance) of failure rates with the established requirements with a given reliability, and in case of a decision on compliance - quantify its value with a given accuracy. Point estimates of failure rates of FTA equipment samples and their variances, calculated from the results of failure tests, are further used to build a regression model of changes in these failure rates and calculate estimates of residual life (service life) samples of FTA equipment samples.