| 简单步降应力加速寿命试验的最优设计 |
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| 引用本文： | 冯文晖,胡昌华,胡锦涛,张军波.简单步降应力加速寿命试验的最优设计[J].控制工程,2007(Z2). |
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| 作者姓名： | 冯文晖 胡昌华 胡锦涛 张军波 |
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| 作者单位： | 第二炮兵工程学院302教研室 陕西西安710025(冯文晖，胡昌华，胡锦涛)，第二炮兵装备研究院科研部 北京100085(张军波) |
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| 摘 要： | 以正常应力下寿命分布函数中参数的极大似然估计的渐近方差为准则,考虑II型截尾的情形,对指数分布场合下简单步降应力加速寿命试验的最优设计问题进行了研究。通过一个实例表明,在总截尾数相同的情况下,简单步降应力加速寿命试验第一步的截尾数,要比简单步进应力加速寿命试验第一步的的截尾数少,并能保证相同的试验精度。
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| 关 键 词： | 步降应力 加速寿命试验 指数分布 Fisher信息矩阵 最优设计 |
Optimum Simple Step-down-stress Design for Accelerated Life Tests with Exponential Distributions |
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| FENG Wen-hui,HU Chang-hua,HU Jin-tao,ZHANG Jun-bo.Optimum Simple Step-down-stress Design for Accelerated Life Tests with Exponential Distributions[J].Control Engineering of China,2007(Z2). |
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| Authors: | FENG Wen-hui HU Chang-hua HU Jin-tao ZHANG Jun-bo |
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| Affiliation: | FENG Wen-hui1,HU Chang-hua1,HU Jin-tao1,ZHANG Jun-bo2 |
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| Abstract: | The optimum simple step-down-stress design for ALT with exponential distributions and type II censoring is primarily studied.The optimum test plans to minimize the asymptotic variance of MLE of the log life time at normal stress are obtained.From the given example,it can be found that the number of failed items in the first stress level of step-down-stress ALT is less than that of the step-up-stress ALT if the total numbers are fixed.And the precision of the results are equivalent. |
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| Keywords: | step-down-stress accelerated life test exponential distributions Fisher information matrix optimum design |
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