On-site reliability evaluation method and device for rail transit products based on mixed population

Abstract

The invention discloses a method and device for on-site reliability evaluation of rail transit products based on a mixed population. The steps of the method include: obtaining on-site operation statistical data of products to be evaluated, and counting the life data distribution status of products to be evaluated, and judging according to the statistical results Constitute the sub-population composition of the current mixed population; group the life data of the products to be evaluated and evaluate the life distribution model separately, integrate the evaluation results of each group, and finally obtain the life distribution model of each sub-population; construct the comprehensive A distribution model; the on-site reliability of the product to be evaluated is evaluated according to the comprehensive distribution model; the device includes a mixed overall structure judgment unit, a comprehensive distribution model establishment unit and a mixed overall reliability evaluation unit. The invention can perform on-site reliability evaluation on rail transit products with mixed overall characteristics, and has the advantages of simple evaluation implementation, high evaluation accuracy and reliability.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method and device for on-site reliability evaluation of rail transit products based on a mixed population. Background technique [0002] Because rail transit products experience various regional environments during operation or there are multiple failure modes in the product itself, the historical data of the product’s operation will show a multi-overall situation, which will bring great benefits to the accurate evaluation of on-site reliability and life prediction of rail transit products. up the challenge. At present, for the reliability evaluation of a mixed population composed of multiple populations, the method of subdividing the population is usually used, that is, each geographical environment or each failure mode is separated, so as to refine the reliability analysis and evaluation. However, using the method of subdividing the whole, on the one hand, the time and ...

AI Technical Summary

Problems solved by technology

However, using the method of subdividing the whole, on the one hand, the time and labor costs required will be greatly increased, and at the same time, analysts are required to be familiar with each failure mode and failure mechanism of the product, which makes it difficult to implement the operation; on the other hand, reliability The indicator is for the overall, the sub-population does not represent all the information of the population, and the evaluation accuracy of the overall reliability through the sub-population is not high

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