Method for evaluating reliability of stepping stress quickened degradation experiment based on time sequence

An accelerated degradation test and time series technology, applied in the direction of strength characteristics, measuring devices, instruments, etc., can solve the problems of being unable to describe the randomness information of the statistical data of the accelerated degradation test, and difficult to apply the reliability evaluation of the accelerated degradation test, etc.
CN101620045AInactive Publication Date: 2010-01-06BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2010-01-06
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a method for evaluating the reliability of a stepping stress quickened degradation experiment based on a time sequence. The method utilizes a correlation coefficient stationary sequence analytical method to describe non-equidistant stochastic information in stepping stress quickened degradation experiment data, establishes a regressive-non-equidistant autoregression degradation model on the basis of obtaining the respective advantages of a deterministic regression model and a stochastic correlation coefficient stationary sequence autoregression model, combines a grey theory to predict a product degradation trend and forms a function and a curve for predicting the life and evaluating the reliability of the stepping stress quickened degradation experiment based on the time sequence. The method obviously decreases the sample quantity of a product and shortens the time of the degradation experiment, thereby saving a large amount of expenses and resources, enhancing the fitting accuracy of the degradation model and enhancing the reliability of a reliability evaluating result.
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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] For products with high reliability and long life, it is often difficult to observe product failure in a short period of time, and analyzing product reliability based on product performance degradation data has become an effective way. In order to evaluate the reliability of these products whose failure data are difficult to obtain but performance degradation data can be obtained, the method of accelerated degradation test came into being.

[0003] To study accelerated degradation failure, the key is to establish an accelerated degradation model in which the characteristic parameters of product performance degradation change with time. Accelerated degradation models are generally divided into two types based on degradation mechanism and statistical data...

Claims

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