Off the bathtub onto the roller-coaster curve (electronic equipment failure)
Off the bathtub onto the roller-coaster curve (electronic equipment failure)
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离开浴缸走上过山车曲线（电子设备故障）
DOI：
10.1109/arms.1988.196476
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Dean L. Lindstrom
中科院分区：
文献类型：
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作者：
Kam L. Wong;M. Beach;Dean L. Lindstrom
1981年发现，电子设备在使用寿命期间的瞬时故障率随使用年限的增加而降低，而浴缸的危险率特征是一个例外，而不是规律。作者研究了这种装置的危险率曲线的形状。研究半导体设备老化的研究人员赞同异常故障的概念，这种故障在危险率曲线上表现为一个驼峰。作者称这些曲线为过山车曲线。假设除了长期的严重磨损故障外，所有其他故障都是由缺陷引起的。通过对缺陷尺寸分布的一些一般假设，可以证明（通过应用疲劳理论）缺陷会以失效形式出现，故障率会降低
In 1981 it was revealed that the instantaneous failure rate of a piece of electronic equipment decreases with age during its useful life and that the bathtub characteristic for hazard rate is an exception rather than the rule. The shape of the hazard rate curve for this device is studied by the authors. Investigators studying semiconducting device burn-in subscribe to the concept of freak failures which manifest themselves as a hump on the hazard rate curve. The authors call these curves the roller-coaster curves. It was postulated that aside from the long-term gross wear-out failures, all other failures develop from flaws. With some general assumptions on the flaw size distribution, one can show (by applying fatigue theory) that the flaws would emerge as failures that give a decreasing failure rate.<<ETX>>