Model construction and evaluation method for service life and reliability of product under outfield circumstance

A reliability and product technology, applied in the field of life and reliability evaluation, can solve problems such as difficult evaluation work and scarce field information

Inactive Publication Date: 2012-09-12
BEIHANG UNIV
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it solves the problems that there is a certain deviation in the direct evaluation of the accelerated degrad

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Model construction and evaluation method for service life and reliability of product under outfield circumstance
  • Model construction and evaluation method for service life and reliability of product under outfield circumstance
  • Model construction and evaluation method for service life and reliability of product under outfield circumstance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0112] If a temperature step stress accelerated degradation test is carried out on a photoelectric product, the sample size is 4, the temperature stress level is 4, the temperature is 60°C, 80°C, 100°C, 120°C; the test time for each stress level is 1250 , 750, 500, 500 hours; the product performance testing time interval Δt is 5 hours. At the same time, a product is used in the field at a temperature of 25°C, and its data has been collected for 5,000 hours. The product's performance testing time interval Δt is 5 hours. Select optical power as its performance parameter, the initial value of optical power y 0 is 100, and the parameter failure threshold l is 40. It is necessary to evaluate the reliability of the product under field conditions for 3 years and the life of the product when the reliability is 0.95.

[0113] Step 1. Establish and determine relevant models

[0114] Since the stress applied to the product is temperature, the Arrhenius model is selected as the acceler...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a model construction and evaluation method for service life and reliability of a product under the outfield circumstance. Specifically, the method comprises the following steps: step one, establishing and determining a degradation model of a product; step two, constructing a correction factor; step three, establishing a bayesian model; step four, obtaining a parameter value of posterior distribution; and step five, evaluating service life and reliability. According to the invention, a relation between laboratory information and outfield information is established and differences among all stress environments are determined and quantized, thereby providing a powerful basis for future work on evaluation and result correction; besides, a method in which two kinds of information, that is the laboratory information and the outfield information, is comprehensively utilized to evaluate service life and reliability of the product under the outfield circumstance is brought forward, so that problems that there is certain deviation due to direct evaluation with utilization of accelerated degradation testing information and it is difficult to do evaluation work due to sparse outfield information can be solved.

Description

technical field [0001] The invention is a method for evaluating the service life and reliability of a product in an external field by comprehensively using accelerated degradation test data and product field data, and belongs to the technical field of life and reliability evaluation. Background technique [0002] Product life and reliability information can be reflected by its failure data and degradation data, which can be used to evaluate the product life distribution model. However, in the actual use of the product in the field, it is difficult to obtain enough information for evaluation in a short period of time. At this time, the accelerated test technology emerges as the times require. For the traditional accelerated life test in the accelerated test, it is difficult to obtain sufficient failure data under the condition of limited time and funds when evaluating long-life and high-reliability products. At this time, the accelerated degradation test method should be use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06Q10/04
Inventor 王立志姜同敏李晓阳王晓红
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap