卫星导航系统的体系安全性分析方法

为了应对卫星导航系统内部复杂关系等体系特征为其安全分析带来的挑战、全面识别和分析卫星导航系统面临的体系安全威胁、提高系统的安全性和服务能力,基于功能依赖网络分析理论提出了从体系角度研究卫星导航系统安全性的建模方法,重点对导航系统内组件系统之间交互关系导致的危险传播、任意失效组合进行了后果分析和原因调查。仿真结果表明该方法能清晰地描述危险传播和失效组合的过程以及进行正逆向的推理分析,也证明了该方法在卫星导航系统安全分析问题上的潜力和适用性。

System of systems safety analysis method for GNSS

In order to address challenges of safety analysis of Global Navigation Satellite Systems(GNSS) brought by its system of systems(SoS) characteristics such as complex relationships between its component systems, to identify and study the SoS hazards across-the-board, and to improve its safety and enhance the service, a GNSS safety modeling method was proposed based on the Functional Dependency Network Analysis(FDNA) theory from the view of SoS, which focuses on effects analysis and reasons investigation of hazards promulgation and random failures combination that caused by complex relationships between component systems in GNSS. The simulation results show that it is able to describle the influencing process of hazards promulgation and random failures combination, and conduct both antrorse and restrorse reasoning distinctly by this method, which also demonstrates its great potential and applicability to SoS safety analysis of GNSS.