Functional Safety

Functional Safety: a New Architectural Perspective: Model-Based Safety Engineering for Automated Driving Systems

Khabbaz Saberi, A.

2020

The automotive industry has seen a rapid change in the technologies used inside the vehicles. Since the introduction of the first electronic control unit, the impact of electronics and computer science on the quality of the vehicles is increasing every year. Arguably, safety is one of the most important quality attributes of a vehicle that needs special attention in all the stages of the life cycle of a vehicle. The overall safety of a vehicle can be seen from multiple aspects, such as passive safety, active safety, functional safety, etc. Functional safety addresses the hazards that are caused by the malfunctioning of Electrical and/or Electronic (E/E) systems. Many factors impact functional safety such as the organization and management, the development process, the design of the systems, the system type and technologies used in it, the quality control methods, etc. The ISO 26262 standard provides the state of the art of functional safety in the automotive industry with respect to development processes, design principles and safety analysis. A technical committee of subject matter experts from industry defines the content of this standard. The difference in viewpoints, choice of language and industry agenda result in unavoidable (even though slight) inconsistencies in the ISO text. Besides, ensuring unique interpretation of standards by experts is impossible. In this research, we work on the different aspects of functional safety: we study the use of models in performing safety engineering and propose a domain model and SW tooling for modeling, we study the impact of functional safety on architectural patterns and propose a new pattern for safety-critical systems. Furthermore, we investigate the impact of applying ISO 26262 to systems of systems and propose a tailored safety lifecycle based on guidelines of ISO 26262 that is augmented to encompass additional considerations pertinent to systems of systems. Finally, we study the human aspects of the development of safety-critical systems in an R&D environment. We introduced a method for measuring the safety culture in accordance with ISO 26262. This research is done at the Integrated Vehicle Safety (IVS) department of TNO. IVS is active in research related to automated driving with special attention to connected and cooperative mobility. The technology roadmap of IVS is defined around Cooperative Automated Driving (CAD), and functional safety topics are an essential part of this roadmap. It should be mentioned that all the results from this research have been applied in one or more running projects at IVS.

Safe and Clean Mobility
Mobility

http://resolver.tudelft.nl/uuid:ee1e4ccd-dcb1-45e5-8c20-517c71028654

884556

Eindhoven University of Technology, Eindhoven

9789464021851

Proefschrift ter verkrijging van de graad van doctor aan de Technische Universiteit Eindhoven, op gezag van de Rector Magnificus, prof.dr.ir. F.P.T. Baaijens, voor een commissie aangewezen door het College voor Promoties

doctoral thesis