The Application of STPA in the Development of Autonomous Vehicle Functional Safety

Safety analysis is the key work in the process of functional safety development of vehicle electronic and electrical system, and it is the main means of hazard identification and safety requirements definition. Compared with the common safety analysis methods, taking the automatic parking system (APA) as an example, the systems theoretic process analysis (STPA) method is introduced. Through the definition of hazards list and control model of related items, the unsafe control behaviors and the scenarios leading to these hazards are analyzed, the safety constraints and requirements are defined and updated, and the relationship between STPA method and the safety of the intended functionality (SOTIF) technology for autonomous driving is described, which provides reference for the functional safety development of complex electronic and electrical systems and automatic driving systems.