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A Convex Optimal Control Framework for Autonomous Vehicle Intersection Crossing

Authors: Xiao Pan; Boli Chen; Stelios Timotheou; Simos A. Evangelou;

A Convex Optimal Control Framework for Autonomous Vehicle Intersection Crossing

Abstract

Cooperative vehicle management emerges as a promising solution to improve road traffic safety and efficiency. This paper addresses the speed planning problem for connected and autonomous vehicles (CAVs) at an unsignalized intersection with consideration of turning maneuvers. The problem is approached by a hierarchical centralized coordination scheme that successively optimizes the crossing order and velocity trajectories of a group of vehicles so as to minimize their total energy consumption and travel time required to pass the intersection. For an accurate estimate of the energy consumption of each CAV, the vehicle modeling framework in this paper captures 1) friction losses that affect longitudinal vehicle dynamics, and 2) the powertrain of each CAV in line with a battery-electric architecture. It is shown that the underlying optimization problem subject to safety constraints for powertrain operation, cornering and collision avoidance, after convexification and relaxation in some aspects can be formulated as two second-order cone programs, which ensures a rapid solution search and a unique global optimum. Simulation case studies are provided showing the tightness of the convex relaxation bounds, the overall effectiveness of the proposed approach, and its advantages over a benchmark solution invoking the widely used first-in-first-out policy. The investigation of Pareto optimal solutions for the two objectives (travel time and energy consumption) highlights the importance of optimizing their trade-off, as small compromises in travel time could produce significant energy savings.

16 pages, 11 figures. This work has been accepted by the IEEE Transactions on Intelligent Transportation Systems

Country
United Kingdom
Related Organizations
Keywords

Optimization, Technology, Turning, convex optimization, Trajectory, Autonomous vehicles, Transportation, Systems and Control (eess.SY), AUTOMATED VEHICLES, Electrical Engineering and Systems Science - Systems and Control, intelligent intersection management system, 0905 Civil Engineering, optimal control, Engineering, 1507 Transportation and Freight Services, Connected and autonomous vehicles (CAVs), 0801 Artificial Intelligence and Image Processing, FOS: Electrical engineering, electronic engineering, information engineering, ENERGY MANAGEMENT, COORDINATION, Science & Technology, Civil, Transportation Science & Technology, Logistics & Transportation, battery-electric vehicle, Mechanical power transmission, Roads, 620, Energy consumption, Electrical & Electronic

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
22
Top 10%
Top 10%
Top 10%
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