A reliability sampling test method based on accelerated degradation data
An accelerated degradation test and accelerated degradation technology, which is applied in electrical digital data processing, special data processing applications, design optimization/simulation, etc. It can solve the problems of uncertain failure modes of tests, inability to conduct tests by producers and users, and high test costs.
Inactive Publication Date: 2019-03-15
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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The advantage of this method is that the obtained parameters can be used to judge whether the product is acceptable or rejected; however, for high-reliability and long-life products, insufficient test conditions will cause the test product to fail and cause the test to fail, while excessive test conditions will cause the test to fail. It will cause uncertain test failure modes and high test costs, making it impossible for producers and users to carry out tests
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[0052] In order to better understand the present invention, the present invention will be further described below in conjunction with specific embodiment:
[0053] A reliability sampling test method based on accelerated degradation data includes the following steps:
[0054] (1) Obtain the accelerated degradation information of the product by conducting accelerated tests on the product, record the degradation test conditions of the accelerated degradation test, and record the test data at different test time points D i and the test time point T i , where i=1, 2,..., n, n is the number of test data; taking smart meters as an example, the power grid company needs to purchase a large number of smart meters every year. Sampling inspection, the inspection content includes basic error, start-up, sneak movement and many other performance indicators of electric energy meters. In this embodiment, the accelerated degradation test is carried out on the smart meters by using the acceler...
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The invention relates to the technical field of reliability testing, in particular to a reliability sampling test method based on accelerated degradation data, the invention obtains the reliability function of the product through the maximum likelihood estimation method according to the data of the accelerated degradation test of the product, According to the reliability function, the optimizationmodel and constraint conditions of acceptance test are established to minimize the variance of accelerated acceptance test, and the parameters of the optimization model are optimized to obtain the optimal acceptance scheme of accelerated acceptance test, which solves the problem of acceptance of batch products with high reliability and long service life. At the same time, it overcomes the shortcoming that the acceptance scheme based on guaranteed test time can not obtain the failure parameters of the product through statistical modeling.
Description
technical field [0001] The invention relates to the technical field of reliability testing, in particular to a reliability sampling test method based on accelerated degradation data. Background technique [0002] At present, there are two commonly used reliability acceptance test evaluation methods: one is based on the acceptance of the guaranteed test time, that is, a certain amount of reliability test is carried out on the test sample to see whether the product can withstand the test conditions and test time without exposure. break down. The advantage of this method is that the test cost is controllable, and the reliability of the product can be verified to a certain extent within a certain test time; however, this method cannot accurately estimate the actual reliability parameters of the product, and cannot obtain the failure parameters of the product through statistical modeling methods. It is impossible to effectively manage the products and it is impossible to disting...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 杨舟李刚唐利涛蒋雯倩张智勇何涌
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD