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A method and system for evaluating spare parts reliability by fusing multi-source information

A multi-source information and reliability technology, applied to computer components, instruments, calculations, etc., can solve problems such as backlog of spare parts, increased number of guarantee failures, differences in reliability rules and design parameters, etc.

Active Publication Date: 2021-07-16
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] When the actual reliability rules of spare parts are inconsistent with the design parameters, it will lead to an increase in the number of support failures or a backlog of spare parts
In special working environments, such as marine working environments such as ships, the difference between the actual reliability law and the design parameters will be greater

Method used

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  • A method and system for evaluating spare parts reliability by fusing multi-source information
  • A method and system for evaluating spare parts reliability by fusing multi-source information
  • A method and system for evaluating spare parts reliability by fusing multi-source information

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Embodiment 1

[0060] Embodiment 1 provided by the present invention is an embodiment of a method for evaluating the reliability of spare parts fused with multi-source information provided by the present invention, such as figure 1 As shown, the embodiment of the present invention provides a method for evaluating the reliability of spare parts that fuses multi-source information, including:

[0061] Step 1. Determine the likelihood weight coefficient of the prior distribution of one information source of the spare part and the prior distribution of each other information source, where the likelihood weight coefficient is the ratio of the likelihood functions of the prior distribution of the two information sources.

[0062] The spare parts are non-repairable parts during the execution of the mission, and their lifespan obeys the exponential distribution, and the probability density function is:

[0063] f(t)=λexp(-λt)

[0064] Among them, t is time, λ is an unknown parameter representing th...

Embodiment 2

[0143] Embodiment 2 provided by the present invention is an embodiment of a spare parts reliability evaluation system that fuses multi-source information provided by the present invention, such as figure 2 As shown, in this embodiment, the system includes: a likelihood weight coefficient determination module 1, a priori distribution determination module 2 of the spare parts failure rate, and a spare parts reliability evaluation module 3;

[0144] Likelihood weight coefficient determination module 1, used to determine the likelihood weight coefficient of the prior distribution of one information source and the prior distribution of other information sources for the reliability of spare parts, the likelihood weight coefficient is the prior distribution of the two information sources The ratio of the likelihood function of ;

[0145] The prior distribution determination module 2 of the spare parts failure rate is used to obtain the prior distribution of the spare parts failure r...

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Abstract

The present invention relates to a method and system for evaluating the reliability of spare parts by fusing multi-source information, comprising: determining the prior distribution of one information source for reliability of spare parts and the likelihood weight coefficients of the prior distributions of other information sources, the likelihood The weight coefficient is the ratio of the likelihood function of the prior distribution of the two information sources; the prior distribution of the failure rate of spare parts is obtained by fusing each information source according to each likelihood weight coefficient; determine the corresponding likelihood function when the guarantee task result is all successful According to the likelihood function corresponding to the support task results and the prior distribution of the spare parts failure rate, the posterior distribution of the spare parts failure rate is determined, and the reliability evaluation results of the spare parts are obtained. Considering the characteristics of the spare parts on-site use data is less, the likelihood weight coefficient is used to The quantification of the credibility of reliability information from different sources can reduce the influence of human factors, effectively and reasonably integrate the reliability information sources of spare parts for reliability evaluation, and have better estimation accuracy.

Description

technical field [0001] The invention relates to the field of reliability estimation of spare parts, in particular to a method and system for evaluating reliability of spare parts by fusing multi-source information. Background technique [0002] When the actual reliability rules of spare parts are inconsistent with the design parameters, it will lead to an increase in the number of support failures or a backlog of spare parts. In special working environments, such as marine working environments such as ships, the difference between the actual reliability law and the design parameters will be greater. [0003] There are many sources of information in the spare parts reliability assessment method, and the effectiveness of different information sources for spare parts reliability assessment is different under different circumstances. Reasonable integration of various information sources can improve the accuracy of spare parts reliability assessment results. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62
CPCG06F18/24155G06F18/25
Inventor 陈华东邵松世刘海涛张志华
Owner NAVAL UNIV OF ENG PLA