Saf E Roadtrains for Efficient Transports Wilhelm Wiberg
Saf. E Roadtrains for Efficient Transports Wilhelm Wiberg, AB Volvo - Vehicle Automation
SERET Partners Objectives – Investigate how to enable safe and fuel efficient road trains · Technology focus – Sensor technology – Wireless communication (V 2 V) – Control algorithms – Driver-system interaction Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 2 2020 -09 -18
Platooning What it is Benefits · An on-road automation and transport solution for commercial vehicles. · Less environmental impact Reduce the fuel consumption and CO 2 emissions. · A number of vehicles travelling together at short distances enabled by wireless connection (V 2 V). · Increased transport efficiency More efficient use of the road network by spacing vehicles closer and creating a better traffic flow. · Following vehicles automatically controlled; longitudinally and possibly laterally. Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 3 2020 -09 -18 · Increased traffic safety Automation control functions support the driver. Wireless network enables immediate response in follower vehicles.
Challenges Control functions and communication · Platoon control – Centralized or distributed – String stability · Sensor technology and data fusion · Optimal distance – safety, fuel efficiency and driver comfort · V 2 V protocol development for platooning Human factors · Information need · How to assure – Driver´s situational awareness and acceptance – A safe interaction with other road users Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 4 2020 -09 -18
Platooning evaluation · Demonstrators/Prototypes developed and evaluated in various environments – Driving simulator – Hand-over and information strategies – Vehicles – Test track – Functional performance – Fuel efficiency – Public road – HMI – Functional performance – Interaction with infrastructure and other road users Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 5 2020 -09 -18
Results Fuel efficiency · Constant speed tests – Test track – Up to 13% for follower vehicles – Simulations at closer gaps – Up to 23% for follower · Simulations on test route – Centralized vs distributed platoon control V 2 V · Proposal how to extend existing V 2 V protocol (Cooperative Awareness Message) to enable platooning Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 6 2020 -09 -18
Results Functional Safety · Hazard analysis and fault tree analysis done on specific case (unintended deceleration) with focus on V 2 V causes · V 2 V error leading to unintended deceleration have high ASIL rating · Methods for handling such an error has been developed Experiences from public road driving · Technology: Platooning is technically feasible · Driver interaction – System status important for driver acceptance – Information from lead vehicle is valuable · Interaction with other road users: – Few ”cut-in” situations on highways – Highway on-ramps impacts ability to keep the platoon together Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 7 2020 -09 -18
Goal fulfillment · The project has successfully achieved its goals: – Enhanced performance, system stability and robustness during development and testing – Fuel efficiency has been simulated and verified on test track – Interaction between drivers and vehicles has been studied, in simulator as well as on public roads – Driver behavior including surrounding traffic behavior has been studied and evaluated in e. g. European Truck Platooning Challenge – Driver’s need of critical information has been investigated and a display showing status has been developed Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 8 2020 -09 -18
Continued work Multi-brand platooning · Sweden 4 Platooning (2017 -2020) – FFI project – Collaboration between AB Volvo and Scania – Customer pilot recently completed · ENSEMBLE (2018 -2021) – EU project – Collaboration between AB Volvo, Scania, DAF, MAN, Daimler and Iveco – Demo during 2020 with multi-brand platooning Volvo Group Trucks Technology Vehicle Automation, Wilhelm Wiberg 9 2020 -09 -18
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