Consistency Checking Method of Degradation Data Based on Window 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 testing 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 storageproduct storage life prediction. The invention provides a consistency test method for accelerated storage and natural storage degradation data based on equal-time-interval degradation increment residual sequence window 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, making 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 power spectral density 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 to ensure the effectiveness of product residual life analysis.

Description

[0001] 1. Technical field [0002] The invention relates to a method for checking the consistency of degradation data of products under different test stress levels, in particular to a method for checking the consistency of degradation data between accelerated storage and natural storage based on window spectrum estimation, and belongs to the field of reliability modeling technology and life prediction analysis , used to verify the effectiveness of the implementation of the accelerated test and its test data, so as to ensure the validity of the remaining life analysis of the product. [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 u...

AI Technical Summary

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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