基于GSN的高速智能领航横向功能安全需求分解

Decomposition of horizontal functional safety requirements of HNP based on GSN

针对避免车辆高速智能领航HNP功能控制车辆非预期的侧向移动这个横向功能安全目标,采用目标结构表示法(goal structuring notation,GSN)对该安全目标进行拆解来推导功能安全需求。首先,采用GSN工具推导出支撑本条安全目标的安全策略;其次利用泳道图展示了安全策略在架构要素上的分配以及这些安全策略需要由哪些具体的要素来实现;最后,对不同架构要素包括执行器EPS、摄像头、毫米波雷达、ADS域控制器的安全需求作了描述。

Aiming at the lateral functional safety goal of avoiding the unexpected lateral movement of the vehicle controlled by the HNP function,this paper uses the goal structuring notation to decompose the safety goal to derive the functional safety requirements.Firstly,the goal structuring notation is used to decompose the safety goal to derive the functional safety requirements;Secondly,the swimlane diagram is used to show the allocation of safety strategies in the architectural elements and the specific elements that need to be implemented by these safety strategies;Finally,the safety requirements of different architecture elements including actuator EPS,camera,radar and ADS domain controller are described.