飞机系统安全性指标的PetriNet分配方法

发布时间：2018-02-22 21:00

  本文关键词： 安全性指标分配 Petri Net故障模型 Petri Net方法 故障严酷等级　出处：《国防科技大学学报》2015年06期 　论文类型：期刊论文

【摘要】：为解决动态故障树抽象而不利于交流的问题,利用Petri Net直观、易用且适用范围广的优点,提出基于Petri Net的飞机系统安全性指标分配方法。通过整理安全性指标及其相关的可靠性指标,选取失效率作为安全性指标,对比动态故障树及Petri Net建模方法,选取后者建立静态逻辑变迁和动态逻辑变迁的Petri Net指标分配模型。在此基础上,提出考虑严酷等级的系统安全性指标分配方法,经过算例分析,构建Petri Net层次系统故障模型进行指标分配。结果表明,分配值均在相应安全性指标内,该方法能够克服动态故障树法不直观、等分配法分配过于粗糙等缺陷,为飞机安全性设计与评估提供参考。
[Abstract]:In order to solve the problem that dynamic fault tree is abstract and unfavorable to communication, the advantages of Petri Net are intuitionistic, easy to use and wide range of application. This paper presents a method of aircraft system safety index allocation based on Petri Net. By sorting out the safety index and its related reliability index, the failure rate is selected as the safety index, and the dynamic fault tree and Petri Net modeling method are compared. The latter is selected to establish the Petri Net index allocation model of static logic transition and dynamic logic transition. On this basis, a system security index allocation method considering the severity of the system is proposed. The Petri Net hierarchical system fault model is constructed for index allocation. The results show that the allocation values are all within the corresponding safety index, and the method can overcome the shortcomings of dynamic fault tree method which is not intuitionistic and the equal allocation method is too rough. It provides reference for aircraft safety design and evaluation.
【作者单位】： 空军工程大学装备管理与安全工程学院;
【基金】：国家自然科学基金资助项目(71171199)
【分类号】：V267;V328
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本文编号：1525298