| 正态分布定时无失效寿命分散系数 |
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| 引用本文： | 傅惠民,张勇波.正态分布定时无失效寿命分散系数[J].航空动力学报,2011,26(8):1836-1840. |
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| 作者姓名： | 傅惠民 张勇波 |
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| 作者单位： | 北京航空航天大学小样本技术研究中心,北京,100191 |
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| 基金项目： | 国家自然科学基金(10472006); 北京市教育委员会共建项目(XK100060418) |
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| 摘 要： | 针对现有分散系数计算公式只适用于完全数据，以及近年来在寿命试验中大量出现的无失效数据并不适用的情况，将完全数据的寿命分散系数的概念推广到定时无失效寿命数据，提出定时无失效数据寿命分散系数方法，给出了相应的寿命分散系数计算公式．理论分析和结算结果表明，定时无失效数据寿命分散系数Lf明显小于完全数据寿命分散系数Lf，从而能有效提高被完全数据寿命分散系数过分压低的安全使用寿命．
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| 关 键 词： | 正态分布 定时无失效数据 截尾试验 寿命预测 分散系数 可靠性 |
| 收稿时间： | 2010/12/19 0:00:00 |
| 修稿时间： | 2011/4/19 0:00:00 |
Life scatter factor of time truncated zero-failure data subjected to normal distribution |
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| FU Hui-min and ZHANG Yong-bo.Life scatter factor of time truncated zero-failure data subjected to normal distribution[J].Journal of Aerospace Power,2011,26(8):1836-1840. |
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| Authors: | FU Hui-min and ZHANG Yong-bo |
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| Institution: | Research Center of Small Sample Technology, Beijing University of Aeronautics and Astronautics,Beijing 100191,China;Research Center of Small Sample Technology, Beijing University of Aeronautics and Astronautics,Beijing 100191,China |
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| Abstract: | For the existing method to calculate the life scatter factor only fits to complete data, it is not suitable for the time truncated zero-failure data which are significantly increasing in the life tests. Therefore, this study introduced the theory of complete data scatter factor into the situation of time truncated zero-failure data, and proposed a method for the life analysis of normal time truncated zero-failure data by providing the formula of life scatter calculation. According to the theory analysis and calculating result, it shows that the scatter factor of time truncated zero-failure data is significantly smaller than the completed data, and thus the method proposed by this study can fully utilize the depressed safety life by complete data scatter factor method. |
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| Keywords: | normal distribution time truncated zero-failure data truncated test life assessment scatter factor reliability |
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