基于SDG的飞机航电系统安全性分析  

Safety Analysis of Aircraft Avionics System Based on SDG

作　　者：孙毅刚[1] 薛蛟 赵珍 SUN Yi-gang;XUE Jiao;ZHAO Zhen(College of Aerospace Engineering,Civil Aviation University of China,Tianjin 300300,China;College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学电子信息与自动化学院,天津300300

出　　处：《计算机仿真》2023年第2期43-51,共9页Computer Simulation

基　　金：国家自然科学基金中国民航局民航联合研究基金(U1533201);国家自然科学基金青年科学基金项目(61703406);中央高校基本科研业务费项目中国民航大学专项资助(3122019109)

摘　　要：安全性是飞机航电系统的重要特性,随着飞机航电系统规模及复杂程度的不断提高,组件模块间资源高度共享、信息快速交互,软硬件高度集成和功能高度耦合,使得系统的安全性分析更为困难。现以民用飞机的航电系统为研究对象,首先采用符号有向图(SDG)对航电系统建模,并对其结构进行简化,建立分层重构SDG模型,其次,综合考虑故障率、故障影响度、动态故障传播属性、故障传播强度等多种影响航电系统安全性要素的同时,将PageRank算法与Dijkstra算法、DFTS算法三种算法相结合,提出了基于PR-DFTS-Dij算法的安全性分析方法;最后,以甚高频通信子系统左侧VHF提供通信功能模块进行实例验证,结果表明,所提出的安全性分析方法合理有效,同时提高了安全性分析工作的效率。Security is an important feature of aircraft avionics systems.With the continuous improvement of the scale and complexity of aircraft avionics systems,the high degree of resource sharing,rapid information interaction between component modules,high software and hardware integration and high functional coupling made the security analysis of the system more difficult.This paper tooakes the avionics system of civil aircraft as the research object.Firstly,the symbolic directed graph(SDG)wais used to model the avionics system,and its structure wais simplified to establish a hierarchical reconstruction SDG model.Secondly,while comprehensively considering various factors affecting the safety of the avionics system,such as failure rate,failure impact degree,dynamic failure propagation attributes,and failure propagation intensity,the PageRank algorithm wais combined with the Dijkstra algorithm and the DFTS algorithm,a security analysis method based on the PR-DFTS-Dij algorithm wais proposed.Finally,the VHF communication function module provided by the left side of the VHF communication subsystem wais used for example verification.The results show that the proposed safety analysis method is reasonable and effective,and at the same time improves the efficiency of the safety analysis work.

关 键 词：航电系统 符号有向图 分层重构 安全性分析 

分 类 号：TP207[自动化与计算机技术—检测技术与自动化装置]