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Evaluating System Architecture Safety in Early Phases of Development with MBSE and STPA

Ahlbrecht, Alexander / A.A. and Bertram, Oliver (2021) Evaluating System Architecture Safety in Early Phases of Development with MBSE and STPA. In: 7th IEEE International Symposium on Systems Engineering, ISSE 2021. International Symposium on Systems Engineering, Wien, Österreich. doi: 10.1109/ISSE51541.2021.9582542. ISBN 978-166543168-2.

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Official URL: https://ieeexplore.ieee.org/document/9582542

Abstract

Emerging segments such as autonomous driving require new by-wire system architectures for steering and braking. These system architectures are highly safety-critical and currently not commonly used in the automotive industry. This results in challenges for traditional development approaches. One issue is that a well-thought-out architecture selection is already required in early phases of development. Within this paper, a concept is proposed to help consideration of safety in this timely architecture selection, using a safety trade-off concept. An early consideration of system architecture safety is achieved by utilization of a formalized System-Theoretic Process Analysis on a Systems Modeling Language model. This underlying system model was developed with a Model-based System Engineering approach. Additionally, it is explained how classical safety considerations and safety principles can be integrated into this safety trade-off. Finally, the approach is demonstrated in an architecture comparison for a simplified Steer-by-Wire architecture. Results show that it is possible to find relevant safety requirements and use them to compare solution architecture candidates.

Item URL in elib:https://elib.dlr.de/148343/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluating System Architecture Safety in Early Phases of Development with MBSE and STPA
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ahlbrecht, Alexander / A.A.Alexander.Ahlbrecht (at) dlr.deUNSPECIFIED
Bertram, OliverOliver.Bertram (at) dlr.dehttps://orcid.org/0000-0002-7732-9280
Date:October 2021
Journal or Publication Title:7th IEEE International Symposium on Systems Engineering, ISSE 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1109/ISSE51541.2021.9582542
ISBN:978-166543168-2
Status:Published
Keywords:MBSE, SysML, STPA, Trade-Off, Safety
Event Title:International Symposium on Systems Engineering
Event Location:Wien, Österreich
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC KoFiF
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems
Institute of Flight Systems > Safety Critical Systems&Systems Engineering
Deposited By: Ahlbrecht, Alexander
Deposited On:31 Jan 2022 12:21
Last Modified:04 Feb 2022 11:18

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