Product failure behavior coupling modeling and reliability evaluation method

A reliability, product technique used in the field of failure behavior modeling

Inactive Publication Date: 2017-05-10
BEIHANG UNIV
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Problems solved by technology

Through the novelty search of existing technologies, there is no research on product failure behavior coupling modeling and reliability evaluation based on Vine-Copula and accelerated degradation tests at home and abroad

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  • Product failure behavior coupling modeling and reliability evaluation method
  • Product failure behavior coupling modeling and reliability evaluation method
  • Product failure behavior coupling modeling and reliability evaluation method

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Embodiment Construction

[0069] The present invention will be further described in detail with reference to the accompanying drawings and embodiments. The invention constructs a coupling model for reliability evaluation by analyzing the correlation between product output parameters, selects a smart meter as an application object, performs degradation modeling on the output performance parameters of the smart meter, and evaluates the reliable life of the meter. Smart meters are typical electronic products with multiple performance parameters. The performance parameters that can represent the degradation state of smart meters include 1 item of cumulative error and 4 items of basic error, which are cumulative error CE and basic errors BE1, BE5, BE9, and BE10. In the constant accelerated degradation test of the smart meter, two kinds of accelerated stresses (temperature and humidity) were selected to carry out the test at three stress levels, with 8 samples for each stress level. The specific stress combin...

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Abstract

A product failure behavior coupling modeling and reliability evaluation method, namely, a product failure behavior coupling modeling and reliability evaluation method based on Vine-Copula and accelerated degradation testing, includes the following steps: 1, degradation trajectory modeling; 2, failure mechanism consistency testing; 3, distribution model making of performance parameters under normal stress with the extrapolation method; 4, failure behavior coupling modeling based on Vine-Copula; 5, reliability evaluation. Through the steps, product failure behavior coupling modeling is completed, a model with joint distribution of reliability degree is established, the problem of solving the reliability function with immediate integration is solved, the product multivariate coupling relationship is clearly described, and the method for reliability evaluation of products with multi-performance parameter correlated characteristics is provided.

Description

technical field [0001] The present invention proposes a product failure behavior coupling modeling and reliability assessment method, in particular to a product failure behavior coupling modeling and reliability assessment method based on Vine-Copula and accelerated degradation tests , which belongs to fault behavior modeling in the field of reliability technology. Background technique [0002] The safe service of aerospace, aviation, nuclear equipment, power network and other major equipment is of great significance to national economic development and national defense construction, but its operating conditions are complex and the environment is harsh, which can easily lead to malignant accidents. Therefore, a correct understanding of faults, assessment and prediction Its reliability is of great significance to ensure the safe operation of equipment and improve economic benefits. Due to the improvement of system complexity and the in-depth understanding of faults, the rese...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 许丹邢梦莉尉麒栋
Owner BEIHANG UNIV
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