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A step-down stress accelerated test method based on acceleration factor model

A technology of accelerating stress and accelerating factor, applied in the field of accelerated testing, can solve problems such as inconvenience in engineering popularization and application, complex solution process, etc., to achieve the effect of being beneficial to engineering application, reducing estimated parameters, and facilitating software implementation

Active Publication Date: 2022-07-01
湖南海智科技有限公司
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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 solve the parameters of the acceleration model and the statistical model during the modeling analysis. The solution process is relatively complicated, which is not convenient for engineering application.

Method used

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  • A step-down stress accelerated test method based on acceleration factor model
  • A step-down stress accelerated test method based on acceleration factor model
  • A step-down stress accelerated 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 particularly pointed out that the following examples are only used to illustrate the specific implementation of the method of the present invention, but not to limit the protection scope of the method of the present invention.

[0120] Step 1 Design an accelerated test plan

[0121] 1-1 Select Acceleration Stress

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

[0123] 1-2 Set the stress level

[0124] Normal stress level S for the product 0 = 220V.

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

[0126] 1-3 Determine the test sample

[0127] The produc...

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Abstract

The invention discloses a step-down stress accelerated test method based on an acceleration factor model, comprising the following steps: 1 designing an accelerated test plan, 2 implementing an accelerated test, 3 selecting an acceleration factor model, 4 analyzing probability statistics, and 5 performing an acceleration factor model parameter regression Analysis and 6 reliability and life assessment. The method of the invention converts the original acceleration model into an acceleration factor model, proposes a mathematical method for estimating the acceleration factor by using the acceleration test data, obtains the unknown parameters of the acceleration factor model through regression analysis, and then uses the acceleration factor model to accelerate the step-down stress The test data is equivalently converted to the normal stress level, and finally the equivalent life data is analyzed to obtain product reliability and life indicators. The method of the invention is beneficial to realize the simplification and standardization of the data analysis process of the step-down stress acceleration test in engineering application, lower the mathematical threshold of engineering application, and provide a set of efficient and simplified test method for engineering application.

Description

technical field [0001] The invention belongs to the technical field of accelerated tests, and in particular relates 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 the reliability information obtained under the accelerated stress level, and obtain the reliability characteristics of the product under the normal stress level. a test method. In other words, 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, accelerated testing received extensive attention in related fields in my country, and it has been in a state of application while researching. Relays have been widely used in life research, involving weapons and equipment, aviati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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