Συντάχθηκε 19-10-2020 17:54
Title: State estimation and control design for multi-region urban networks
Abstract: This talk consists of two parts. In the first part, the problem of traffic state estimation for large-scale urban networks is studied. Given a network that is partitioned in a number of regions, an estimation engine is developed according to the Extended Kalman Filter (EKF) theory, that tries to estimate the real state of the multi-region dynamic system based on traffic sensors measurements. A stochastic model is presented that is based on simple aggregated dynamics and some real-time measurements.
In the second part, an approach for real-time network-wide perimeter traffic control is presented. The network is partitioned into a small number of homogeneous regions (zones) and perimeter control is applied to the inter-regional flows, along the boundaries between regions. In this concept, a mathematical formulation of the original nonlinear problem in a linear parameter varying (LPV) form is derived. This work presents the mathematical analysis of the optimal control problem, as well as the approximations and simplifications that are assumed in order to derive the formulation of a linear optimization problem.
Numerical simulation results are presented for both parts (estimation and control) and for both the cases of a microscopic and a macroscopic environment (plant). The simulation results demonstrate the efficiency of the proposed real-time closed-loop system.
Short Bio: Anastasios Kouvelas is the Director of the research group Traffic Engineering at the Institute for Transport Planning and Systems (IVT), Dept. of Civil, Environmental and Geomatic Engineering, ETH Zurich, Switzerland (since August 2018). Prior to joining IVT, he was a Research Scientist at Urban Transport Systems Laboratory (LUTS), EPFL (2014-2018), and a Postdoctoral Fellow with Partners for Advanced Transportation Technology (PATH) at University of California, Berkeley (2012-2014). Before this, he was appointed Adjunct Professor at Technical University of Crete (2011) and Research Associate at the Information Technologies Institute, Centre for Research & Technology Hellas (CERTH), Thessaloniki, Greece (2011-2012). In 2009, he was a Doctoral Visiting Scholar at the Center for Advanced Transportation Technologies (CATT) of the Viterbi School of Engineering, Dept. of Electrical Engineering, University of Southern California, Los Angeles.
He has received the Diploma, M.Sc. and Ph.D. degrees from the Department of Production & Management Engineering (Operations Research), Technical University of Crete, Greece, in 2004, 2006, and 2011, respectively, specializing in modeling, control, and optimization of large-scale transport systems. He was a member of Dynamic Systems & Simulation Laboratory (DSSL) from 2003 until 2011.
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