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当前数据密集型系统越来越多地应用于实时计算机系统中,尤其是在航电系统如导航系统、飞行管理系统。航电系统中数据量大且述对象复杂多样,共享程度要求和安全性要求较高,数据错误对于航电系统的安全性有重大影响。数据安全已经成为影响航电系统安全的重要因素。因此本文结合当前最新的研究成果研究了航电系统的数据组成,梳理总结出常见的数据危害类型;然后研究了航电系统数据危害的产生,基于态势感知理论提出了航电系统数据危害层次模型,并以可控飞行触地事故为例进行了分析,验证了数据危害层次模型的正确性,为指导航电系统数据安全性分析提供理论支持。
Today’s data-intensive systems are increasingly used in real-time computer systems, especially avionics systems such as navigation systems and flight management systems. The avionics system has a large amount of data and a complex object diversity, sharing requirements and safety requirements, data errors have a significant impact on the safety of avionics systems. Data security has become an important factor affecting the safety of avionics systems. Therefore, this paper combines the latest research results of the current avionics system data composition, summarizes the common types of data hazards; and then study the avionics system data hazards, based on the situation perception theory proposed avionics data hazard level model The paper also analyzes the controllable touchdown accident as an example to verify the correctness of the data hazard hierarchy model and provide theoretical support for the guidance of the data security analysis of the avionics system.