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General Fail-Safe Emergency Stopping for Highly Automated Vehicles

Paper presented at 9. Tagung Automatisiertes Fahren, München, 21.-22.11.2019
: 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

Fulltext (PDF; )

2019, 8 pp.
Tagung Automatisiertes Fahren <9, 2019, München>
Presentation, Electronic Publication
Fraunhofer IOSB ()

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.