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Towards a System-Wide Functional Safety Concept for Automated Road Vehicles

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Automotive Systems Engineering II

Abstract

In this chapter, a process to derive a system-wide functional safety concept for automated road vehicles is presented and a short introduction of Skill and Ability Graphs for a functional safety concept is given. The process to develop a functional safety concept contains an extension to the ISO 26262 standard’s Driver Assistance System development process. This extension is a Skill Graph to model system skills in the concept phase. The Skill Graph improves the Hazard Analysis and Risk Assessment by modeling driving skills early in the development process. Additionally, the Skill Graph is transferred to an Ability Graph, used to design a self-perception and self-representation, which enables monitoring of the system’s operation and functional capabilities online. This self-representation can be part of a technical safety concept. Based on the ability levels, safety actions can be derived which maintain or reach a safe state of operation. As a result, a self-monitoring system is possible, in which humans, either aboard the vehicle or external, do not have to monitor the system.

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Notes

  1. 1.

    A Teleoperator is a person, who monitors and even controls a vehicle via a wire-less communication link.

  2. 2.

    An item is a “System or array of systems to implement a function at the vehicle level, to which ISO 26262 is applied.” (ISO 26262 2011, Part 1, 1.69).

  3. 3.

    An element is a “System or part of a system including components, hardware, software, hardware parts, and software units.” (ISO 26262 2011, Part 1, 1.32).

  4. 4.

    Reschka et al. (2015) used the terms skill and ability interchanged than this chapter. Due to new research results, the terms had to be switched. Skills are defined in the concept phase and abilities are used during operation of the vehicle.

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Acknowledgments

We would like to thank our project partners in the project Stadtpilot, the project CCC and the project aFAS and our colleagues at the Technische Universität Braunschweig and the project partners in CCC and aFAS for their support of our work. We would like to thank the DFG for funding our research in CCC and the BMWi for funding our research in aFAS.

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  1. Institut für Regelungstechnik, Technische Universität Braunschweig, Hans-Sommer-Str. 66, 38106, Braunschweig, Germany

    Andreas Reschka, Gerrit Bagschik & Markus Maurer

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  1. Andreas Reschka
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  2. Gerrit Bagschik
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  3. Markus Maurer
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Correspondence to Andreas Reschka .

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  1. Fachgebiet Fahrzeugtechnik, Technische Universität Darmstadt, Darmstadt, Germany

    Hermann Winner

  2. Institut für Automobiltechnik, Technische Universität Dresden, Dresden, Germany

    Günther Prokop

  3. Institut für Regelungstechnisch, Technische Universität Braunschweig, Braunschweig, Germany

    Markus Maurer

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Reschka, A., Bagschik, G., Maurer, M. (2018). Towards a System-Wide Functional Safety Concept for Automated Road Vehicles. In: Winner, H., Prokop, G., Maurer, M. (eds) Automotive Systems Engineering II. Springer, Cham. https://doi.org/10.1007/978-3-319-61607-0_6

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