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Electromechanical product degradation modeling method which combines with manufacturing process data

A technology of electromechanical products and manufacturing processes, which is applied in the field of degradation modeling of electromechanical products, can solve the problems that the random influence coefficient of the degradation model cannot be quantified, and the influence of the manufacturing process has not been considered.

Active Publication Date: 2018-10-12
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problem that the influence of the manufacturing process on the product degradation process has not been considered in the related research on the degradation modeling of electromechanical products, and the problem that the random influence coefficient in the degradation model cannot be quantitatively expressed, the present invention provides a combination of manufacturing process data Degradation modeling method of mechanical and electrical products

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  • Electromechanical product degradation modeling method which combines with manufacturing process data
  • Electromechanical product degradation modeling method which combines with manufacturing process data
  • Electromechanical product degradation modeling method which combines with manufacturing process data

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specific Embodiment approach 1

[0026] Specific Embodiment 1: This embodiment provides a method for modeling degradation of electromechanical products combined with manufacturing process data. The method first determines the function form of the 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, the distribution of the random influence coefficients in the degradation model is determined 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; finally, according to the determined functional form of the deg...

specific Embodiment approach 2

[0047] Specific implementation mode two: the following combination Figure 1 to Figure 4 This embodiment is described, and this embodiment is a further description of the first specific embodiment. In this embodiment, a certain type of electromagnetic relay is used as an object to perform degradation modeling combined with manufacturing process data. The specific steps are as follows:

[0048] Step 1: According to formula (1) and the structural characteristics of the electromagnetic relay, construct its release time T rls (The output characteristics) about the reed initial force F ini (The functional relationship of the underlying performance parameters), as shown in formula (4):

[0049] T rls =F(F ini |Θ 1 ) = kF ini +c (4)

[0050] where Θ 1 ={k,c} is the set of random influence coefficients of the degradation model.

[0051] Step 2: according to the degeneration mechanism of the reed of the electromagnetic relay, the degeneration physical model of the initial forc...

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Abstract

The invention discloses an electromechanical product degradation modeling method which combines with manufacturing process data. The method comprises the steps of determining the function form of an electromechanical product output characteristic degradation model according to the composition characteristics, the manufacturing process data and the degradation mechanism of the electromechanical product; determining the distribution of stochastic influence coefficients in the degradation model by a finite element simulation and approximate modeling method based on the manufacturing process dataof the electromechanical product; estimating the value of the fixed influence coefficient in the degradation model based on the degradation data of mechanical and electrical products test samples; andcompleting electromechanical product degradation modeling which combines with manufacturing process data according to the determined function form of the degradation model, stochastic influence coefficient and fixed influence coefficient. The electromechanical product degradation modeling method solves the problem that a current degradation modeling method needs to make subjective assumptions about the distribution of the stochastic influence coefficient determined by the manufacturing process because the stochastic influence coefficient can not be expressed quantitatively.

Description

technical field [0001] The invention belongs to the technical field of performance and reliability analysis of electromechanical products, and relates to a degradation modeling method of electromechanical products. Background technique [0002] Product reliability is jointly determined by design, manufacture and management. For electromechanical 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 difference between individuals of electromechanical products in batches, and this difference will be Directly affect the degradation process of electromechanical products. The individual variability caused by the manufacturing process can be regarded as uncertainty information. In terms of degradation modeling and reliability assessment considering uncertainty, Meeker and Escobar proposed that there are fixed influence coefficie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 叶雪荣林义刚王清敏郑博恺翟国富
Owner HARBIN INST OF TECH
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