Step-down stress acceleration test method based on acceleration factor model

A technology of accelerated stress and acceleration factor, applied in the field of accelerated testing, which can solve the problems of complex solution process and inconvenient engineering promotion and application.

Active Publication Date: 2021-02-05
湖南海智科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the step-down stress acceleration test mainly uses the acceleration model to describe the relationship between the product life characteristics and the stress level. It is necessary to sol

Method used

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  • Step-down stress acceleration test method based on acceleration factor model
  • Step-down stress acceleration test method based on acceleration factor model
  • Step-down stress acceleration test method based on acceleration factor model

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Embodiment Construction

[0119] The method of the present invention is further described below by taking an electrical product as an example. It should be pointed out that the following examples are only used to illustrate the specific implementation of the method of the present invention, but not for limiting the protection scope of the method of the present invention.

[0120] Step 1 Design accelerated test plan

[0121] 1-1 Selection of accelerated stress

[0122] In this test, the working voltage is selected as the accelerating stress.

[0123] 1-2 Set the stress level

[0124] The normal stress level S of the product 0 =220V.

[0125] In order to ensure that the failure mechanism of the product under accelerated stress is consistent with normal use, four accelerated stress levels are set at logarithmic equal intervals within the product’s working voltage tolerance limit, that is, S 4 =300V, S 3 =287V, S 2 =270V, S 1 =250V,.

[0126] 1-3 Determine the test sample

[0127] The product is ...

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Abstract

The invention discloses a step-down stress acceleration test method based on an acceleration factor model. The method comprises the following steps: 1, designing an acceleration test scheme; 2, implementing an acceleration test; 3, selecting an acceleration factor model; 4, carrying out probability statistical analysis; 5, carrying out acceleration factor model parameter regression analysis; and 6, performing reliability and service life evaluation. According to the method, an original acceleration model is converted into an acceleration factor model, a mathematical method for estimating an acceleration factor by utilizing acceleration test data is provided, unknown parameters of the acceleration factor model are obtained through regression analysis, and step-down stress acceleration testdata is equivalently converted to a normal stress level by utilizing the acceleration factor model; and finally, the equivalent life data is analyzed to obtain product reliability and life indexes. According to the method, the simplification and standardization of the data analysis process of the step-down stress acceleration test in engineering application are facilitated, and the mathematical threshold of the engineering application is reduced; the invention provides a set of efficient and simplified test method for the application in engineering.

Description

technical field [0001] The invention belongs to the technical field of accelerated tests, in particular to a step-down stress accelerated test method based on an acceleration factor model. Background technique [0002] Accelerated Testing is based on reasonable engineering and statistical assumptions, using statistical models related to physical failure laws to convert reliability information obtained under accelerated stress levels to obtain reliability characteristics of products under normal stress levels a test method. In other words, the accelerated test is a rapid test method that shortens the test period by increasing the test stress level while keeping the failure mechanism unchanged. [0003] In the early 1970s, the accelerated test received extensive attention in related fields in my country, and has been in the state of research and application. At present, it has been used in missiles, ammunition, engines, bearings, gears, low-voltage motors, He-Ne lasers, capac...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14G06F119/04
CPCG06F30/20G06F2119/14G06F2119/04
Inventor 张春华李永江
Owner 湖南海智科技有限公司
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