Environmental factor estimation method based on Arrhenius model

A technology of environmental factor and point estimation, applied in computing, special data processing applications, instruments, etc., can solve the problems of inaccurate results and complicated calculation process.

Active Publication Date: 2014-02-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Its disadvantage is that when there is not enough experimental data, the data can only be obtained through numerical simulation, and the calculation process is complicated, and the obtained results are not accurate.

Method used

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  • Environmental factor estimation method based on Arrhenius model
  • Environmental factor estimation method based on Arrhenius model
  • Environmental factor estimation method based on Arrhenius model

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Embodiment

[0059] figure 1 It is a specific implementation flow chart of the environmental factor point estimation method based on the Arrhennis model of the present invention;

[0060] In this embodiment, such as figure 1 As shown, the environmental factor point estimation method based on the Arrhenius model of the present invention includes the following steps:

[0061] S101. Extract an appropriate amount of carbon film resistors as tested samples, and obtain degradation data of the samples;

[0062] S102. Draw a plane degradation trajectory according to the degradation data of the sample, and collect the i-th sample at t i1 ,t i2 ...t ij Degradation data y ij , Through the general model y of performance degradation analysis ij =D ij +ε ij ,i=1, 2,...,n,j=1, 2,...,l, fitting the degenerate trajectory D(t ij ,β i ), and use the least square method to estimate the parameter β i , Of which there are n samples, l observation time points, ε ij Is a random error, β i Is the coefficient of the dege...

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Abstract

The invention discloses an environmental factor estimation method based on an Arrhenius model. According to the method, a degradation track is drawn according to performance degradation data, an invalid threshold value is set, pseudo-failure lifetime data are obtained according to a degradation model, the obtained pseudo-failure lifetime data are taken as incomplete samples after the distribution of the pseudo-failure lifetime data is verified, and a truncation sample is obtained. An environmental factor expression formula based on the Arrhenius model is given according to the specific distribution definition of environmental factors, parameters in the environmental factor expression formula are estimated with an optimum linear estimation method, and finally, the environmental factors obtained through calculation are verified. Accordingly, the reliability of a product is estimated more accurately, simultaneously, the efficiency is high, and the cost is low.

Description

Technical field [0001] The present invention belongs to the technical field of product life prediction and reliability prediction, and more specifically, relates to an environmental factor point estimation method based on the Arrhenius model. Background technique [0002] In product reliability evaluation, tests are often conducted in multiple environments to collect product performance data running under different environmental conditions. However, due to the limitation of conditions, it is difficult to collect data under actual working environment conditions, and environmental factors can be used to The test data and information under the harsh environment are converted to the test data that needs to be obtained under the actual conditions, thereby reducing the test cost, expanding the sample size, and improving the reliability. [0003] As a conversion factor, the environmental factor mainly converts the failure life data in one environment into the failure life data in another ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘震魏郁昆黄建国杨成林
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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