Prediction method of multi-functional parameter accelerated degradation testing product life based on multivariate hybrid time sequence analysis

A technology of accelerated degradation test and time series analysis, applied in the analysis of materials, measurement devices, strength characteristics, etc., can solve the problem of product life prediction and reliability evaluation that are difficult to directly apply accelerated degradation test, the overall trend is irreversible, and the life prediction results are not accurate enough, etc. question
CN102042848AInactive Publication Date: 2011-05-04BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2011-05-04
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a prediction method of multi-functional parameter accelerated degradation testing product life based on multivariate hybrid time sequence analysis, belonging to the technical field of accelerated test evaluation, comprising the steps of test data acquisition and pretreatment; multi-functional parameter time sequence modeling; multi-functional parameter degradation failure prediction; multi-functional parameter degradation accelerated modeling and multi-functional parameter product life prediction; the problem that the prediction is inaccurate since the mutual influence among a plurality of property parameter degradation processes of the product is unconsidered in the single property parameter degradation prediction of the product is solved; a multivariate hybrid time sequence model is put forward in considering monotonicity degradation trend, randomness and cyclical fluctuation in the product multi-functional parameter degradation process and the relativity of the characteristics among the property parameter; a failure criterion of the product multi-functional parameter degradation is put forward; the description to the multi-functional parameter degradation process is more comprehensive and the accuracy of the prediction result of multi-functional parameter accelerated degradation testing life is improved.
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Description

technical field

[0001] The invention relates to an accelerated degradation test life prediction and reliability evaluation method, belonging to the technical field of accelerated test evaluation. Background technique

[0002] The emergence of more and more long-life and high-reliability products makes product life and reliability evaluation more difficult. Predicting product life and reliability based on product performance degradation information has become an effective way. In order to evaluate the reliability of these products for which failure data is difficult to obtain but performance degradation data can be obtained, a degradation test method has emerged. In order to obtain more effective product performance degradation information in a shorter time, the method of accelerated degradation test has further emerged.

[0003] However, there are still some deficiencies in the existing accelerated degradation test product life prediction methods:

[0004] First of all, i...

Claims

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