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一类外场数据缺失时的部件寿命分布拟合方法 被引量：1

Lifetime Distribution Fitting Method for a Type of Component with Missing Field Data
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摘要 在外场可靠性分析中,部件小修故障数据流失情况比较严重,给真实使用条件下的部件可靠性评估工作带来了一定误差。针对此类外场数据缺失情况,利用混合Gamma分布建立部件寿命分布模型,利用改进的极大似然法进行参数估计,并对母体分布特征进行了统计推断,结合部件物理失效机理分析,得出了较为合理的寿命分布。 Field data missing account for mini-repairs in components reliability estimation is usually severe. Aimed to this situation, the mixture-Gamma distribution model is adopted to establish the lifetime distribution model of component, and the parameters are estimated using improved MLE method and Chi-square test. The distribution characteristics are statistically deduced and then a reasonable lifetime distribution is obtained with the analysis of physical failure mechanism of the component.
作者 马欣 刘晓东
机构地区 空军工程大学工程学院
出处 《机械科学与技术》 CSCD 北大核心 2012年第7期1136-1139,共4页 Mechanical Science and Technology for Aerospace Engineering
关键词 外场故障数据 缺失 混合Gamma分布 极大似然法 field data missing data mixture-gamma distribution model MLE
分类号 TB114.3 [理学—概率论与数理统计]
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参考文献11

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二级参考文献21

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机械科学与技术
2012年 第7期

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