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Change-point analysis of the failure mechanisms based on accelerated life tests

机译：基于加速寿命测试的失效机制的变化点分析

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摘要

In the accelerated life tests, the common failure mechanism is considered as a necessary condition for the extrapolated procedure. The traditional extrapolation model may become unreliable if the failure mechanisms under the accelerated stress levels are different from that under the normal operating condition. In this paper, we propose a change-point model for the coefficients of variation to fit the abrupt change behavior of the failure mechanisms with a nonparametric empirical likelihood approach. The related statistical inferences of the proposed model are studied to test whether there exists a change and estimate the corresponding location of the change. Monte Carlo simulations are conducted to investigate the performance of the proposed change-point test model. For the small sample data, a bootstrapping method is presented as an alternative detecting procedure. The detailed calculation process is illustrated by the lifetime data of the metal oxide semiconductor transistors in the power distribution system of Chinese Tiangong aircrafts.
机译：在加速寿命试验中，常见的失效机制被认为是外推过程的必要条件。如果加速应力水平下的故障机制与正常操作条件不同，传统的外推模型可能变得不可靠。在本文中，我们提出了一种变化系数的变化点模型，以符合非参数经验似然方法的故障机制的突然变化行为。研究了所提出的模型的相关统计推论，以测试是否存在变化并估计变化的相应位置。进行了蒙特卡罗模拟，以研究建议的变化点测试模型的性能。对于小样本数据，引导方法作为替代检测过程呈现。详细的计算过程由中国天邦飞机配电系统中的金属氧化物半导体晶体管的寿命数据说明。

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