摘要
安全失效概率(PFS)是衡量安全仪表系统(SIS)性能优劣的重要指标之一。在阐述SIS表决结构的设计特性及其可用性关系基础上,研究了基于故障树SIS表决结构的可用性关系,并通过具体实例进行验证。研究结果表明:表决结构故障树可用性与设计特性不能完全相符,更加准确的可用性模型尚需进一步研究。
Probability of failing safety is one of important indicators to measure performance of safety instrumented system （SIS）. Based on expounding of design characteristics and availability of SIS voting configurations, the availability of SIS voting configurations based on fault tree analysis （FTA） is studied. It is verified with some special actual cases. The results show the availability of SIS voting configurations is not completely consistent with design characteristics. More accurate availability model needs to be further studied.
作者
徐飞
谭壮壮
Xu Fei Tan Zhuangzhuang(China National Petroleum Offshore Engineering Co. Ltd., Beijing, 100028, China)
出处
《石油化工自动化》
CAS
2017年第3期41-43,共3页
Automation in Petro-chemical Industry
关键词
安全仪表系统
故障树
可用性
安全失效概率
表决结构
safety instrumented system （SIS）
fault tree analysis （FTA）
probability of failingsafety （PFS）
voting configurations
