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考虑人因差异因素的共因失效分析方法研究

, PP. 103-108

Keywords: 共因失效,人因差异,影响向量,人因可靠性分析,组件降级状态

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Abstract:

共因失效将引起冗余系统中多个组件同时失效,已有统计数据表明人的因素是导致共因失效的最主要原因,因此考虑人因差异是避免共因失效发生的有效方法。现有的人因可靠性分析(HRA)方法均没有考虑到人因差异对系统可靠性的影响。本文提出一种新的考虑人因差异因素的共因失效分析方法,该方法从组件降级水平的角度来定量描述人因差异对系统可靠性的影响,其基本思想是基于第二代人因可靠性方法(CREAM)来建立一个模糊逻辑模型,推导出人误概率,并将人误概率映射为组件降级水平值(CDV),而共因失效率与人因差异化之间的关系可以由CDV值求出的影响向量来表示,进而找到人因差异与系统共因失效率之间的数学关系。最后,通过实例验证了该方法的有效性。

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