Weibull type product reliability acceptance scheme design method based on expert information

Abstract

The invention relates to a Weibull type product reliability acceptance scheme design method based on expert information. The method comprises the following steps: acquiring expert information of a Weibull type product to be accepted, determining a nonlinear programming model through a maximum entropy method, and determining distribution parameters; determining a parameter distribution formula of the Weibull-type product according to the distribution parameters, and obtaining the probability that the service life of the product is greater than an inspection upper limit, the probability that the service life of the product is less than an inspection lower limit and the probability that a fault product occurs for a given time in a timing truncation acceptance test through a sampling-based algorithm; and determining a producer risk and a user risk in combination with a parameter distribution formula, and determining an acceptance scheme package of the product according to the producer risk and the user risk. Expert information is effectively utilized, two kinds of risk values can be remarkably reduced when the number of invested test samples is small, and the test time is shortened.

Description

technical field [0001] This application relates to the technical field of reliability testing, in particular to a Weibull-type product reliability acceptance scheme design method based on expert information. Background technique [0002] Reliability Acceptance Test (RAT) is a test to check whether the reliability of the product reaches the required level. According to the results of the reliability verification test, a conclusion of accepting or rejecting the tested products can be made. The verification test is mainly based on the results of the following hypothesis tests to make judgments: [0003] [0004] in, is the parameter acceptable value for , and is the parameter rejection value. If it is judged to be acceptable based on the test results , then accept the batch of products; if the judgment is accepted , the batch is rejected. During the inspection process, when established and accepted , such errors are called Type 1 errors; when established...

AI Technical Summary

Problems solved by technology

However, in actual operation, due to the limitation of funding costs, the amount of test samples that can be invested is often small, and traditional test methods have limitations in solving the problem of small samples

The acceptance test plan currently in use is proposed in GJB899A, but because only the system-level test data is used to carry out the test, the test time is too long, or the two types of risks in the short-term test plan are relatively high, and there are low efficiency, poor practicality

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