广义指数分布场合下简单步进应力加速寿命试验的最优设计

对加速寿命试验进行最优设计,不仅可以使产品的各种可靠性指标获得更准确的估计,而且也能够节省试验的时间和费用.针对简单步进应力加速寿命试验,以在正常应力水平下给定时间可靠性估计的渐进方差最小为标准,提出了定时截尾场合下,广义指数分布函数步进应力加速寿命试验的优化设计模型,并通过理论推导,得到了相应的优化设计方案.

The Optimal Design for the Accelerated Life Tests of Simple Step-stress under Generalized Exponential Distributions

The optimal design of accelerated life test can not only make a variety of product reliability indexes obtain a more accurate estimate, but also can save the time and cost of the test. In view of simple step-stress tests for accelerated life, optimization criterion being defined as minimizing the AV of the reliability estimate at a specified time under normal operating condition, optimal design model is proposed of generalized exponential distribution function under step stress accelerated life tests based on Type I censoring. Through the theoretical derivations, the corresponding optimal design plan is obtained.