航电系统安全性分析工具设计与研究

随着航电系统综合化程度的不断提高,传统的安全性分析方法过于依赖工程经验,难以保证失效模式的完备性。同时在系统迭代设计的过程中,由于系统的复杂性,会导致安全性分析工作量过大,增加了时间及经济成本。针对上述问题,设计了一种自动化安全性分析工具,基于Sys ML描述语言建立安全性数据模型,采用路径追溯的方法完成故障树自动建模,并对生成的故障树进行共模分析和区域安全性分析。以某系统为例的实验结果表明,该工具能够实现故障树自动建模与分析,提高了安全性分析的效率和完备性。

Design and Research on Safety Analysis Tool for Avionics System

With the continuous improvement of avionics system, the traditional method of safety analysis is difficult to guarantee the completeness of failure mode as it is too dependent on engineering experience. And in the process of system iterative design, due to the complexity of the system, the workload of safety analysis is too large, which increases the time and cost. Aiming at the above problems, an automated safety analysis tool was designed, the safety data model was established based on SysML, automatic fault tree was built by using route tracing method, and the common mode analysis and zone safety analysis were carried out on the generated fault tree. The experimental results of a system show that the tool can realize the automatic modeling and analysis of the fault tree and improve the efficiency and competeness of the safety analysis.