Method for evaluating reliability of mechanical and electrical products based on combination of manufacturing process data

A technology of electromechanical products and manufacturing processes, applied in the field of reliability evaluation of electromechanical products, can solve the problems of not considering the manufacturing process and unable to accurately evaluate the reliability level of batch products

Active Publication Date: 2018-10-26
哈尔滨宇高电子技术有限公司
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Problems solved by technology

[0004] In order to solve the problem that the reliability level of a batch of products cannot be accurately evaluated based on a limited number of test samples because the influence of the manufacturing process on the product degradation process is not considered in the relevant research on the reliability evaluation of electromechanical products, the present invention Provides a reliability evaluation method for electromechanical products combined with manufacturing process data

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  • Method for evaluating reliability of mechanical and electrical products based on combination of manufacturing process data
  • Method for evaluating reliability of mechanical and electrical products based on combination of manufacturing process data
  • Method for evaluating reliability of mechanical and electrical products based on combination of manufacturing process data

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specific Embodiment approach 1

[0027] Specific Embodiment 1: This embodiment provides a method for evaluating the reliability of electromechanical products combined with manufacturing process data. The method first determines the functional form of its output characteristic degradation model according to the composition characteristics, manufacturing process data and degradation mechanism of electromechanical products. , the model includes fixed influence coefficients and random influence coefficients determined by the manufacturing process; then, based on the manufacturing process data of the electromechanical product, k random influence coefficients in the degradation model are obtained through finite element simulation and approximate modeling methods At the same time, based on the degradation data of mechanical and electrical product test samples, the value of the fixed influence coefficient in the degradation model is estimated through multiple iterations; then, according to the obtained set of k random ...

specific Embodiment approach 2

[0043] Specific implementation mode two: the following combination Figure 1 to Figure 6 This embodiment will be described, and this embodiment will further describe the first specific embodiment. In this embodiment, a certain type of electromagnetic relay is used as an object to perform reliability evaluation combined with manufacturing process data. The specific steps are as follows:

[0044] Step 1: Determine its release time T according to formula (1) and the structural characteristics, manufacturing process data and degradation mechanism of the electromagnetic relay rls (The output characteristics) The functional relationship of the degradation model is shown in formula (3).

[0045] T rls (t,T)=[T rls (0)-c][a(1.8T+491.67)(logt+C)+b]+c (3)

[0046] In the formula, T rls (t, T) is the release time value stored under the temperature stress T to the moment t; T rls (0) is the release time value at 0 moment; Θ 1 ={T rls (0), c} is the set of random influence coeffici...

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Abstract

The invention discloses a method for evaluating reliability of mechanical and electrical products based on combination of manufacturing process data. The method comprises the following steps: firstly,determining a functional form of an output characteristic degradation model according to composition characteristics, the manufacturing process data and a degradation mechanism; subsequently, obtaining k sets of random influence coefficients in the degradation model through finite element simulation and approximate modeling methods based on the manufacturing process data of the mechanical and electrical products; simultaneously, estimating values of fixed influence coefficients in the degradation model by means of multi-iteration based on the degradation data of test samples of the mechanicaland electrical products; subsequently, obtaining k degradation failure pseudo-life of the product according to the k groups of random influence coefficient sets, fixed influence coefficient estimation values and degradation failure threshold values of the mechanical and electrical products; and finally, calculating and giving out the reliability of the mechanical and electrical products at each moment based on the obtained degradation failure pseudo-life. According to the method for evaluating the reliability of the mechanical and electrical products based on combination of the manufacturingprocess data disclosed by the invention, an effective means is provided for solving the problem of reliability evaluation of batch products under small sample conditions.

Description

technical field [0001] The invention belongs to the technical field of electromechanical product performance and reliability analysis and relates to a method for evaluating the reliability of electromechanical products. Background technique [0002] For mechanical and electrical products, due to the constraints of the manufacturing process level, the parameter dispersion brought about by its design and manufacturing process makes it inevitable that there will be a certain degree of variability between individual batches of mechanical and electrical products, and this difference will be It directly affects the degradation process of electromechanical products, and ultimately affects the reliability level of batch products. At present, the relevant research on the influence of manufacturing process on product reliability is mainly carried out from the failure distribution or reliability function of the product. Jiang R et al. studied the influence of assembly errors, unqualifi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 叶雪荣林义刚陈岑付饶翟国富
Owner 哈尔滨宇高电子技术有限公司
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