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A Censored Life Data Cut-off Method for Reliability Evaluation

A technology of life data and reliability, applied in data processing applications, instruments, calculations, etc., can solve the problem of underestimating product life and reliability, and achieve the effect of small life dispersion and high precision

Inactive Publication Date: 2021-08-27
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For long-life products, the two-parameter Weibull distribution significantly underestimates the life and reliability of the product

Method used

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  • A Censored Life Data Cut-off Method for Reliability Evaluation
  • A Censored Life Data Cut-off Method for Reliability Evaluation
  • A Censored Life Data Cut-off Method for Reliability Evaluation

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Embodiment Construction

[0052] The present invention will be further elaborated below in conjunction with the accompanying drawings of the description.

[0053] Such as figure 1 Shown, a kind of censored life data selection method for reliability evaluation of the present invention is characterized in that comprising the following steps:

[0054] 1) Determine the shape parameter β in the Weibull distribution function used to characterize the life of electromechanical products;

[0055] 2) Determine the position parameter γ in the Weibull distribution function used to characterize the service life of electromechanical products;

[0056] 3) Determine the scale parameter η in the Weibull distribution function used to characterize the service life of electromechanical products;

[0057]4) Write the specific expression form of product life distribution through shape parameter β, position parameter γ and scale parameter η, and then calculate the value of life mean, standard deviation and coefficient of v...

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Abstract

The invention relates to a method for selecting censored life data for reliability evaluation, comprising the following steps: determining the shape parameter β in the Weibull distribution function used to characterize the life of electromechanical products; determining the shape parameter β in the Weibull distribution function used to characterize the life of electromechanical products Position parameter γ; determine the scale parameter η in the Weibull distribution function used to characterize the service life of electromechanical products; write the specific expression form of product life distribution through the shape parameter β, position parameter γ and scale parameter η, and then calculate the average life value of electromechanical products, standard The value of difference and coefficient of variation; according to the value of life mean, standard deviation and coefficient of variation of mechanical and electrical products, the censored test data is selected. Based on the idea of ​​sampling, the present invention proposes a new method for evaluating the reliability of bearings when the shape parameters are known, and adopts three-parameter Weibull distribution for fitting and parameter estimation to obtain higher precision and better reflect the reliability of the product sexual reality.

Description

technical field [0001] The invention relates to a product reliability evaluation technology, in particular to a method for selecting censored life data for reliability evaluation. Background technique [0002] In recent years, more and more attention has been paid to product reliability evaluation based on no-failure data. Statistical analysis of natural function and degenerate failure models, etc. Martz and Waller first proposed a reliability control test method for non-failure data under the condition of exponential distribution. According to the risk criterion of posterior distribution, the prior distribution of failure probability is selected, and then the estimation of failure probability is obtained. Zhao Haibing et al [3] extended the probability estimation method of failure rate, proposed the least square estimation and Bayes estimation method of the distribution type of failure rate probability in Weibull distribution and normal distribution, and verified the valid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06
CPCG06Q10/06393G06Q10/06395
Inventor 谢里阳吴宁祥李海洋
Owner NORTHEASTERN UNIV LIAONING
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