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Safe Transitions to Manual Driving From Faulty Automated Driving System

Josef Nilsson (Institutionen för signaler och system, Mekatronik ; SAFER - Fordons- och Trafiksäkerhetscentrum )
Göteborg : Chalmers University of Technology, 2014. ISBN: 978-91-7597-035-6.- 160 s.
[Doktorsavhandling]

This thesis presents a method to assess the safety of transitions from automated to manual driving when vehicle automation fails. The method is based on contributions to the understanding of human driving behavior, also presented in this thesis. Interviews with drivers and driving simulator studies of driving with automation, and particularly analyzes of situations where automation failed provided the base for the proposed method. Among the results of the studies, it was found that drivers were more likely to control an automation failure if automation was only replacing the driver in longitudinal control of the vehicle, i.e., steering still managed by the driver. Moreover, the studies found that drivers responded to the failures with varying success. For the most critical failures, almost half of the drivers collided, while for a less critical failure, about two thirds of the drivers managed to control the situation and avoid a collision. <\p>

Individual differences between drivers were considered to have contributed to the varying success to control automation failures. The proposed method for assessing the safety of transitions therefore adapts online to the individual driver. While the vehicle is driven manually, the driver's capability to control the vehicle is estimated and described as a subset of the vehicle's state-space. In the event of an automation failure, the proposed method assesses whether vehicle states are within this subset or not. If vehicle states are within the subset, the driver is deemed capable of taking over, and the transition to manual control is classified as safe. <\p>

The method has been evaluated on data from real vehicles, with human drivers, to demonstrate its performance. Results indicate that the proposed method correctly classifies transitions as safe or unsafe. <\p>

Nyckelord: Driver takeover, safety, functional safety, automated driving, vehicle automation, controllability, brake failure, driver capability, driving simulator.



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Denna post skapades 2014-05-12. Senast ändrad 2015-03-27.
CPL Pubid: 197965

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Mekatronik (2005-2017)
SAFER - Fordons- och Trafiksäkerhetscentrum

Ämnesområden

Transport
Robotteknik och automation
Reglerteknik
Inbäddad systemteknik
Tillämpad psykologi

Chalmers infrastruktur

Relaterade publikationer

Inkluderade delarbeten:


Exploring end-user experiences: self-perceived notions on use of adaptive cruise control systems


Driver performance in the presence of adaptive cruise control related failures: Implications for safety analysis and fault tolerance


Semi-automated versus highly automated driving in critical situations caused by automation failures


Examination

Datum: 2014-06-11
Tid: 10:00
Lokal: HC1, Hörsalsvägen 14, Chalmers University of Technology
Opponent: Prof. Mauro Da Lio, Department of Industrial Engineering, University of Trento, Italy

Ingår i serie

Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie 3716