A Multi-Stage Reliability Growth Evaluation Method Using Multiple Products Sequentially

Abstract

The invention provides a multi-phase reliability increasing evaluation method of gradual investment of a plurality of sets of products. The multi-phase reliability increasing evaluation method comprises the following steps: 1: calculating a failure distribution function of a final phase of the first set of product by utilizing reliability increasing testing data of the first set of product; 2: calculating equal initial failure time, inherited from the test of the first set of product, of the second set of product according to the failure distribution function of the final phase of the first set of product; 3: calculating a failure distribution function of a final phase of the second set of product according to the equal initial failure time of the second set of product and reliability increasing testing data of the second set of product; 4: repeating the step 2 and the step 3 and calculating failure distribution functions of final phases from the third set of product to the ith set of product in sequence; and 5: finally, calculating reliability indexes. According to the multi-phase reliability increasing evaluation method, the data obtained by a multi-phase reliability increasing test of the gradual investment of the plurality of sets of products is used, and the aims of directly calculating the reliability related indexes and carrying out reliability evaluation are achieved; and the multi-phase reliability increasing evaluation method is simple to calculate and convenient to use and has popularization and application values.

Description

technical field [0001] The present invention proposes a multi-stage reliability growth evaluation method in which multiple products are put in successively, and the conditional density function and the pivot method are comprehensively used to evaluate the multi-stage reliability growth of multiple products, which can effectively solve the problem of successive input of multiple products, On the basis of inheriting the mature state of previous products, each product continues to carry out the reliability evaluation problem of the complex growth process of reliability growth, which belongs to and is applicable to related technical fields such as reliability growth data analysis and reliability evaluation. Background technique [0002] As an important part of reliability engineering, reliability growth technology has become an effective way to improve product reliability, save test time, reduce test times and reduce development costs. [0003] Commonly used reliability growth a...

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Problems solved by technology

[0006] The first failure time of the first product is t 11 , the second failure time is t 12 ,..., nth 1 The failure time is The second product is deployed on the basis of the long-term test of the first product, fault recovery and improvement optimization, and its first failure time is t 21 , the second failure time is t 22 ,..., nth 2 The failure time is ...; the i-th product is deployed on the basis of the long-term test of the i-1 product, failure zeroing and improvement optimization, and its first failure time is t i1 , the second failure time is t i2 ,..., nth i The failure time is The proposed multi-stage reliability growth evaluation method for successively investing multiple products can effectively solve the reliability evaluation problem of the above-mentioned complex reliability growth process

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