二项式分布场合加速退化零失效可靠性验证试验

对于长寿命高可靠产品，采用零失效可靠性验证试验需要大量的时间或者样本。为了缩短试验时间，建立了一种在二项式分布场合下基于性能退化数据的加速退化零失效可靠性验证试验方法。首先从加速退化模型和测量数据估计样品在规定时间内的退化量及其方差，然后在使用方风险和可用试验样本量的约束下，对试验费用进行优化，得到了最优的试验方案，并给出了单个样品停止试验的判定规则。最后通过一个实例证实了该方法能有效地缩短试验时间。灵敏度分析表明，在规定时间内退化量的预估值对试验方案的优化结果影响较大。

Reliability demonstration through accelerated degradation zero-failure testing under binomial distribution

The excessive test time or a large sample size is required to demonstrate the reliability of long-lifetime highly-reliable products through the conventional zero-failure testing. In order to reduce the test time, a method for accelerated degradation zero-failure reliability demonstration testing based on performance degradation data under binomial distribution is proposed. First, the degradation and its variance are estimated at the specified time of a test unit from accelerated degradation model and measured data. Then, the optimum test plans are derived by minimizing the total test cost, and satisfying the constraints on the consumer’s risk and available sample size. The decision rules for terminating the test of a unit are also presented. Finally, the proposed method is validated to be effective on reducing test time with a real example. A sensitivity analysis indicates that the pre-estimation of degradation during the specified time period has a great effect on the optimum test plans.