Journal
IEEE INTELLIGENT TRANSPORTATION SYSTEMS MAGAZINE
Volume 12, Issue 4, Pages 92-109Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MITS.2018.2880261
Keywords
Energy consumption; Road traffic; Energy efficiency; Vehicles; Stochastic processes; Vehicle dynamics; Real-time systems
Funding
- FNR Fonds national de la Recherche (Luxembourg) through the AFR Aides a la Formation-Recherche Ph.D. grant scheme [7041503]
- FNR
- Delphi Automotive Systems S.A.
- Centre de Formation pour Conducteurs S.A.
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Battery Electric Vehicles have a high potential in modern transportation, however, they are facing limited cruising range. The driving style, the road geometries including slopes, curves, the static and dynamic traffic conditions such as speed limits and preceding vehicles have their share of energy consumption in the host electric vehicle. Optimal energy management based on a semi-autonomous ecological advanced driver assistance system can improve the longitudinal velocity regulation in a safe and energy-efficient driving strategy. The main contribution of this paper is the design of a realtime risk-sensitive nonlinear model predictive controller to plan the online cost-effective cruising velocity in a stochastic traffic environment. The basic idea is to measure the relevant states of the electric vehicle at runtime, and account for the road slopes, the upcoming curves, and the speed limit zones, as well as uncertainty in the preceding vehicle behaviour to determine the energy-efficient velocity profile. Closed-loop Entropic Value-at-Risk as a coherent risk measure is introduced to quantify the risk involved in the system constraints violation. The obtained simulation and field experimental results demonstrate the effectiveness of the proposed method for a semi-autonomous electric vehicle in terms of safe and energy-efficient states regulation and constraints satisfaction.
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