北京大学学报(自然科学版)

估计不同阶段和环境下的设备可靠性

何书元1,赵宇2, 房祥忠1   

  1. 1北京大学数学科学学院, 北京 100871; 2北京航空航天大学工程系统工程系, 北京 100083;
  • 收稿日期:2008-01-10 出版日期:2008-05-20 发布日期:2008-05-20

Equipment Reliability Estimation under Different Experiment Periods and Environments

HE Shuyuan1,,ZHAO Yu2,FANG Xiangzhong1   

  1. 1School of Mathematical Sciences,Peking University, Beijing 100871;2Department of System Engineering of Engineering Technology,Beihang University, Beijing100083;
  • Received:2008-01-10 Online:2008-05-20 Published:2008-05-20

摘要: 同型号设备的可靠性根据不同的使用环境发生变化。随着环境指标的不断恶化或改善,可靠性形成环境的函数称为可靠性曲线。估计出这条曲线后,就可以对未知环境下的设备可靠性给出合理的预测。在不同的试验阶段,可靠性曲线的形状一般有显著的不同。作者利用全体试验数据估计最后试验阶段的可靠性曲线,对于对数正态总体研究不同试验阶段的可靠性曲线的估计问题,给出了估计方法,证明了估计量的一致强相合性,并用计算机模拟试验说明方法的可用性。

关键词: 可靠性, 对数正态分布, 环境

Abstract: Under different experiment periods and environments,the same equipment showsdifferent reliability.As the environment condition changes,the equipment reliability becomes a function of the environment,which is called a reliability curve.Given the estimation of the reliability curve,one can predict the equipment reliability for unknown environment. The log-normal data is discussed,the estimator is provided, the strong consistency is proved and simulation is used to show the estimator can be used in practice.

Key words: reliability, log-normal, environment

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