Article 17419

Title of the article

ANALYSIS OF OPPORTUNITIES TO REDUCE THE AMOUNT OF RELIABILITY TESTS 

Authors

Yurkov Nikolay Kondratievich, doctor of technical sciences, professor, the honoured worker of science of the Russian Federation, head of sub-department of radio equipment design and production, Penza State University (440026, 40 Krasnaya street, Penza, Russia), E-mail: yurkov_NK@mail.ru 
Mikhailov Viktor Sergeevich, lead engineer, Central Research Institute of Chemistry and Mechanics named after D. I. Mendeleev (115487, 16а Nagatinskaya street, Moscow, Russia), E-mail: Mvs1956@list.ru

Index UDK

519.248:62-192 

DOI

10.21685/2307-4205-2019-4-17 

Abstract

Background. To test the reliability of complex and highly reliable products required to expose a large number of test products. In order to reduce the amount of testing, the evaluation of reliability indicators is carried out by a calculation-experimental method. Under the calculated-experimental method understand: the method of assessing the reliability of an object by calculating, in which the reliability indicators of all or some of its component parts are determined experimentally; evaluation of reliability indicators in the presence of basic information about the constituent parts of the object and information about its structure. It should be noted that the point-based and interval estimation methods are the basis of the computational-experimental method, and the test plans themselves are considered definitive. The next step to reduce the amount of testing is to reduce the accounted for failures. In most cases, the permissible number of failures during the test process is reduced to zero. All these steps allow you to minimize the cost of conducting tests for reliability. However, the costs of testing are still high, which forces the developer and manufacturer of products to look for other approaches to the sampling and evaluation of the results of reliability tests. The aim of the work is to find a solution to the problem of reducing the volume of tests on the basis of point estimates of reliability indicators obtained from the results of tests that did not give failures.
Materials and methods. The proposed method for solving the problem of reducing the number of tested products for fail-safe tests is based on the use of expressions for point estimates of reliability indicators (instead of NDG), obtained recently, as calculation formulas.
Conclusions. The use of estimates of reliability parameters given in this paper allows us to minimize the sample size during the reliability tests that were planned as reliable, which greatly solves the problem of minimizing the sample size. This was possible because these estimates make it possible to carry out a point estimate based on the results of tests that did not give failures, which, in turn, does not allow to underestimate the real indicator of reliability.

Key words

mean time to failure, probability of uptime, exponential distribution, test plan, point estimate 

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Дата создания: 03.02.2020 16:36
Дата обновления: 04.02.2020 14:59