An AEBS Use Case for Model-Based System Design Integrating Safety Analyses and Simulation

Advanced driver assistance systems (ADAS) and automated driving functions are the most complex automotive systems today. They span multiple ECUs, sensors and actuators and need to integrate different, sometimes counteracting requirements. On top of this comes their safety-criticality, both in terms of functional safety (FuSa) (failure-related) and safety of the intended functionality (SOTIF) (performance-related). Model-based systems engineering (MBSE) with tightly integrated iteration loops over safety analysis and simulation can provide a solution. However, there is no "cook-book" how to practically integrate all these different work steps into one efficient workflow. We report on an internal case study we have made using an Advanced Emergency Braking System (AEBS), from which a complete MBSE/MBSA workflow was derived for its application in industry-grade developments.