Integrated Stress Reliability Accelerated Test Method Based on Multiple Models
A technology of accelerated testing and comprehensive stress, which is applied in environmental/reliability testing, testing electrical devices and instruments in transportation, etc., which can solve the problems of increasing funds and testing resource consumption, failing to meet the needs of high-reliability product development, and taking a long time, etc. problems, to achieve the effect of reducing the reliability test cost and shortening the reliability test time
Active Publication Date: 2022-05-03
中国人民解放军92942部队
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Problems solved by technology
With the improvement of product reliability level, the average time between failures of reliability indicators of some products can be thousands of hours, or even tens of thousands of hours. When using conventional reliability test methods to verify reliability indicators, it takes a long time and consumes experiments. More funds, which delay the progress of the project, and greatly increase the consumption of funds and test resources, conventional reliability test methods can no longer meet the needs of high-reliability product development
[0004] For example, in the 1980s, the avionics equipment in the United States already required the average time between failures of the reliability index to reach more than 2,000 hours. If the high-risk timed censored test statistical plan was selected, a single sample at least 2,200 hours of reliability tests should be carried out to verify its reliability. It takes 3 months for the reliability index, which seriously affects the progress of the project
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[0022] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0023] The invention provides a multi-model based comprehensive stress reliability accelerated test method, the implementation steps of the method are as attached figure 1 and 2 Shown:
[0024] Step 1: Determine the stress benchmark under test and the reliability test profile and reliability test time of the product under normal stress
[0025] (1) Taking the submarine equipment as an example of the tested product, assuming that the average time between failures of its reliability index is T, and the normal operating temperature range is t 0 -t 1 , humidity ≤ 95% (with condensation);
[0026] (2) According to GJB899A-2009 "Reliability Appraisal and Acceptance Test", the test profile of the normal stress reliability test of the tested product is the test profile of the submarine equipment in GJB899A-2009 "Reliability Appraisal and Acceptance Test" (no c...
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The invention discloses a comprehensive stress reliability accelerated test method based on multiple models, belonging to the technical field of reliability test. This method first determines the stress benchmark under test and the reliability test profile and reliability test time of the product under normal stress; then selects the accelerated stress, uses the Coffin-Masson, Arrhenius and Peck models to calculate the acceleration factor and duration of the stress, and calculates Reliability accelerated test time and comprehensive acceleration factor; then determine the reliability accelerated test vibration stress application method and application time in turn, determine the reliability accelerated test profile, and finally carry out the reliability accelerated test. The invention can significantly shorten the reliability test time, save reliability test funds, and simultaneously achieve the purpose of verifying the reliability index.
Description
technical field [0001] The invention belongs to the technical field of reliability test, in particular to a reliability accelerated test method under a comprehensive stress environment based on Coffin-Masson, Arrhenius and Peck models. Background technique [0002] As the core content of product quality characteristics, reliability is even more important today. With the improvement of product quality, its reliability level is getting higher and higher. As an important means of assessing product reliability level, reliability test is facing a series of difficulties. [0003] At present, the reliability test is a commonly used method for assessing reliability indicators. The main basis for electronic products is GJB899A-2009 "Reliability Identification and Acceptance Test". The timed censored test statistical plan is selected, and the corresponding reliability test profile of GJB899A is selected. Conduct experiments. With the improvement of product reliability level, the ave...
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IPC IPC(8): G01R31/00
CPCG01R31/003G01R31/008
Inventor 徐东王岩磊黄金娥张扬程红伟张衍王大翊江杰刘鹏鹏刘隆波熊玲付芸
Owner 中国人民解放军92942部队