60 citations · 150 across the 24 of their papers we have counts for
29 papers
Conditional Max-Sum for Asynchronous Multiagent Decision Making
Dimitrios Troullinos, Georgios Chalkiadakis, Ioannis Papamichail +1
In this paper we present a novel approach for multiagent decision making in dynamic environments based on Factor Graphs and the Max-Sum algorithm, considering asynchronous variable…
Nonlinear Cruise Controllers with Bidirectional Sensing for a String of Vehicles
Iasson Karafyllis, Dionysios Theodosis, Markos Papageorgiou
We introduce a nonlinear cruise controller that is fully decentralized (by vehicle) and uses spacing and speed measurements from the preceding and following vehicles to decide on t…
From Road Congestion to Vehicle-Control Enabled Artificial Traffic Fluids
Iasson Karafyllis, Dionysios Theodosis, Markos Papageorgiou +1
This article provides an overview of the design of nonlinear feedback Cruise Controllers (CCs) for automated vehicles on lane-free roads. The feedback design problem is particularl…
A Comparative Study of Numerical Methods for Approximating the Solutions of a Macroscopic Automated-Vehicle Traffic Flow Model
George Titakis, Iasson Karafyllis, Dionysis Theodosis +2
In this paper, a particle method is used to approximate the solutions of a "fluid-like" macroscopic traffic flow model for automated vehicles. It is shown that this method preserve…
Controlling Automated Vehicles on Large Lane-free Roundabouts (Extended Version)
Mehdi Naderi, Markos Papageorgiou, Dimitrios Troullinos +2
Controlling automated vehicles on large lane-free roundabouts is challenging because of the geometrical complexity and frequent conflicts among entering, rotating, and exiting vehi…
Forward Completeness and Applications to Control of Automated Vehicles
Iasson Karafyllis, Dionysis Theodosis, Markos Papageorgiou
Forward complete systems are guaranteed to have solutions that exist globally for all positive time. In this paper, a relaxed Lyapunov-like condition for forward completeness is pr…
A Particle Method for 1-D Compressible Fluid Flow
Iasson Karafyllis, Markos Papageorgiou
This paper proposes a novel particle scheme that provides convergent approximations of a weak solution of the Navier-Stokes equations for the 1-D flow of a viscous compressible flu…
Modified Dynamic Programming Algorithms for GLOSA Systems with Stochastic Signal Switching Times
Panagiotis Typaldos, Markos Papageorgiou
A discrete-time stochastic optimal control problem was recently proposed to address the GLOSA (Green Light Optimal Speed Advisory) problem in cases where the next signal switching…
A Nonlinear Heat Equation Arising from Automated-Vehicle Traffic Flow Models
Dionysis Theodosis, Iasson Karafyllis, George Titakis +2
In this paper, a new nonlinear heat equation is studied that arises as a model of the collective behavior of automated vehicles. The properties of the solutions of this equation ar…
Cruise Controllers for Lane-Free Ring-Roads based on Control Lyapunov Functions
Dionysis Theodosis, Iasson Karafyllis, Markos Papageorgiou
The paper introduces novel families of cruise controllers for autonomous vehicles on lane-free ring-roads. The design of the cruise controllers is based on the appropriate selectio…
Optimal Trajectory Planning for Connected and Automated Vehicles in Lane-free Traffic with Vehicle Nudging
Venkata Karteek Yanumula, Panagiotis Typaldos, Dimitrios Troullinos +3
The paper presents a movement strategy for Connected and Automated Vehicles (CAVs) in a lane-free traffic environment with vehicle nudging by use of an optimal control approach. St…
Constructing Artificial Traffic Fluids by Designing Cruise Controllers
Iasson Karafyllis, Dionysis Theodosis, Markos Papageorgiou
In this paper, we apply a Control Lyapunov Function methodology to design two families of cruise controllers for the two-dimensional movement of autonomous vehicles on lane-free ro…
Stability Analysis of Nonlinear Inviscid Microscopic and Macroscopic Traffic Flow Models of Bidirectional Cruise-Controlled Vehicles
Iasson Karafyllis, Dionysis Theodosis, Markos Papageorgiou
The paper introduces a new bidirectional microscopic inviscid Adaptive Cruise Control (ACC) model that uses only spacing information from the preceding and following vehicles in or…
Optimization-Based Path-Planning for Connected and non-Connected Automated Vehicles
Panagiotis Typaldos, Markos Papageorgiou, Ioannis Papamichail
A path-planning algorithm for connected and non-connected automated road vehicles on multilane motorways is derived from the opportune formulation of an optimal control problem. In…
Two-Dimensional Cruise Control of Autonomous Vehicles on Lane-Free Roads
Iasson Karafyllis, Dionysis Theodosis, Markos Papageorgiou
In this paper, we design decentralized control strategies for the two-dimensional movement of autonomous vehicles on lane-free roads. The bicycle kinematic model is used to model t…
Linear-Quadratic regulators for internal boundary control of lane-free automated vehicle traffic
Milad Malekzadeh, Ioannis Papamichail, Markos Papageorgiou
Lane-free vehicle movement has been recently proposed for connected automated vehicles (CAV) due to various potential advantages. One such advantage stems from the fact that increm…
Optimal internal boundary control of lane-free automated vehicle traffic
Milad Malekzadeh, Ioannis Papamichail, Markos Papageorgiou +1
A recently proposed paradigm for vehicular traffic in the era of CAV (connected and automated vehicles), called TrafficFluid, involves lane-free vehicle movement. Lane-free traffic…
Nonlinear Adaptive Cruise Control of Vehicular Platoons
Iasson Karafyllis, Dionysis Theodosis, Markos Papageorgiou
The paper deals with the design of nonlinear adaptive cruise controllers for vehicular platoons operating on an open road or a ring-road. The constructed feedback controllers are n…
Analysis and Control of a Non-Local PDE Traffic Flow Model
Iasson Karafyllis, Dionysis Theodosis, Markos Papageorgiou
The paper provides conditions that guarantee existence and uniqueness of classical solutions for a non-local conservation law on a ring-road with possible nudging (or "look behind"…
Lane-free Artificial-Fluid Concept for Vehicular Traffic
Markos Papageorgiou, Kyriakos-Simon Mountakis, Iasson Karafyllis +1
A novel paradigm for vehicular traffic in the era of connected and automated vehicles (CAVs) is proposed, which includes two combined principles: lane-free traffic and vehicle nudg…
Feedback Control of Scalar Conservation Laws with Application to Density Control in Freeways by Means of Variable Speed Limits
Iasson Karafyllis, Markos Papageorgiou
The paper provides results for the stabilization of a spatially uniform equilibrium profile for a scalar conservation law that arises in the study of traffic dynamics under variabl…
Analysis and Control of a Non-Standard Hyperbolic PDE Traffic Flow Model
Iasson Karafyllis, Nikolaos Bekiaris-Liberis, Markos Papageorgiou
The paper provides results for a non-standard, hyperbolic, 1-D, nonlinear traffic flow model on a bounded domain. The model consists of two first-order PDEs with a dynamic boundary…
Global Exponential Stabilization of Acyclic Traffic Networks
Maria Kontorinaki, Iasson Karafyllis, Markos Papageorgiou
This work is devoted to the construction of explicit feedback control laws for the robust, global, exponential stabilization of general, uncertain, discrete-time, acyclic traffic n…
Highway traffic state estimation using speed measurements: case studies on NGSIM data and highway A20 in the Netherlands
Claudio Roncoli, Nikolaos Bekiaris-Liberis, Markos Papageorgiou
This paper presents two case studies where a macroscopic model-based approach for traffic state estimation, which we have recently developed, is employed and tested. The estimation…