Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung IOSB

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  • Publication
    General Fail-Safe Emergency Stopping for Highly Automated Vehicles
    ( 2019)
    Beyerer, Jürgen
    ;
    Doll, J.
    ;
    Duerr, F.
    ;
    Flad, M.
    ;
    Frey, M.
    ;
    Gauterin, F.
    ;
    Hohmann, S.
    ;
    Knoch, E.
    ;
    Kohlhaas, R.
    ;
    Lauber, A.
    ;
    Pistorius, F.
    ;
    Roschani, Masoud
    ;
    Ruf, Miriam
    ;
    Sax, E.
    ;
    Strasser, S.
    ;
    Ziehn, Jens
    From SAE level 3 onwards, automated vehicles must be able to resolve sudden system failures without driver intervention, including failure modes that are difficult or impossible to address by redundancy alone. Causes of hazardous multiple-point faults-beyond internal failures-include lightning strikes or deliberate attacks by electromagnetic pulses. Stopping the vehicle under such conditions is challenging: A full braking maneuver may risk rear-end collisions or loss of traction; likewise, any other constant braking profile will pose considerable risk of not achieving a true ""safe state"". This paper presents an emergency stopping system to execute a situation-dependent braking maneuver that can resolve system failures up to(but not limited to) a full electrics/electronics failure, with the aim of providing a baseline safety solution for all failure modes (short of mechanical failures) for which no dedicated solution is available. The system is composed of an electronic planning unit and a hydraulic/mechanical subsystem, both of which are implemented and tested in simulated and in real environments.