Consistency Test Method for Accelerated Storage and Natural Storage Degradation Data Based on Maximum Entropy Spectrum Estimation

Abstract

One of the important assumptions of the accelerated storage degradation test is that the product has the same failure mechanism when being stored under normal stress and accelerated stress. Failure mechanism consistency test under two stress conditions is an important premise for accelerated storage degradation test design, and is also a key problem and a basic problem for solving long storage product storage life prediction. The invention provides an accelerated storage and natural storage degradation data consistency test method based on maximum entropy spectrum estimation. The method comprises the following steps: equivalently converting test data under each acceleration stress level into test data under a natural storage environment, carrying out regression analysis by utilizing the equivalent conversion test data under each equivalent stress level to obtain a residual sequence, and judging the consistency of the test data by utilizing the consistency of the maximum entropy spectrum estimation of the residual sequence. According to the consistency verification method, the effectiveness of the implementation scheme of the acceleration test and the test data is verified so as toensure the effectiveness of product residual life analysis based on the acceleration test data.

Description

[0001] 1. Technical field [0002] The invention provides a method for checking the consistency of degradation data based on maximum entropy spectrum estimation under different stress levels, which belongs to the field of reliability modeling technology and life prediction analysis, and is used for the implementation of accelerated tests and their test data Validity verification to ensure the validity of product remaining life analysis. [0003] 2. Background technology [0004] For long-term storage products, their effective storage life is one of the important design and use indicators. However, the state of long-term storage products changes very slowly under normal storage stress. In order to obtain the storage failure law of the product as soon as possible and predict the storage life, the method of increasing the stress is usually used to accelerate the storage failure of the product. For some long-term storage products, even under accelerated stress, it is difficult to ...

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Problems solved by technology

[0005] At present, the research on the consistency test method of the accelerated test failure mechanism in domestic and foreign literature is mainly divided into three categories: the first category is the consistency test of the failure mechanism of sudden failure products, such as the consistency of the normal distribution variance; The third category is the degraded failure products with clear failure mechanism, and the parameter method is generally used to test whether the degraded orbits under the two stresses belong to the same family with different parameters; the third category is the degraded failure products with unclear failure mechanism, generally by means Qualitative judgments are based on expert experience, and the conclusions at this time are somewhat subjective and difficult to popularize and apply

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