高速智能领航系统的安全分析

Safety analysis for highway navigation pilot system

针对高速智能领航系统的安全问题,利用危害分析及风险评估HARA方法对该系统进行了全面地安全分析。首先对功能安全及标准ISO26262作了大体介绍;其次对高速智能领航系统的相关项包括功能定义、运行设计条件及初始系统架构进行定义;最后基于HNP系统功能描述,利用HAZOP分析方法使用引导词与相关项定义的功能进行组合来假设功能的故障行为。依据HAZAOP分析的功能故障行为在整车层级的危害,结合场景建立危害事件,并对开发出的每个危害事件进行风险评估决定其汽车安全完整性等级ASIL,从而获取功能安全目标。

Aiming at the safety problems of highway navigation pilot, this paper makes a comprehensive safety analysis of the system using hazard analysis and risk assessment method. This paper firstly gives a general introduction to functional safety and standard ISO26262;Secondly, it defines the relevant items of highway navigation pilot, including function definition, operation design condition and initial system architecture;Finally, based on the function description of the HNP system, the HAZOP analysis method is used to assume the failure behavior of the function combining the guide words with the functions defined by the relevant items. According to the failure behavior of the function in the whole vehicle level analyzed by HAZAOP, hazardous events are established in combination with the scenario, and the risk assessment is conducted for each hazardous event to determine its vehicle safety integrity level ASIL, so as to obtain the safety goals.