Modelling and Optimal Receding-horizon Control of Maritime Container Terminals |
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Authors: | Angelo Alessandri Simona Sacone Silvia Siri |
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Institution: | (1) DIPTEM-Department of Production Engineering, Thermoenergetics, and Mathematical Models, University of Genova, P.le Kennedy Pad. D, 16129 Genova, Italy;(2) DIST-Department of Communications, Computer and Systems Sciences, University of Genova, Via Opera Pia 13, 16145 Genova, Italy |
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Abstract: | The main objective of this paper consists in modelling, optimizing, and controlling container transfer operations inside intermodal
terminals. More specifically, maritime container terminals are here considered, involving three kinds of transportation modes,
i.e., maritime, rail, and road transport. Generally speaking, an intermodal port terminal can be seen as a system of container
flows with two interfaces, towards the hinterland and towards the sea, respectively. Moreover, inside a terminal, unloading
operations of inbound containers, container storage, and loading operations of outbound containers are carried out. A simple
model for maritime container terminals is proposed in this paper. In the model, a system of queues represents the standing
of containers and their movements inside the terminal. The dynamic evolutions of these queues are described by discrete-time
equations, where the state variables represent the queue lengths and the control variables take into account the utilization
of terminal resources such as load/unload handling rates. On the basis of the proposed model, an optimization problem is defined
that consists in minimizing the transfer delays of containers in the terminal. The problem is stated as an optimal control
problem whose solution is sought by adopting a receding-horizon strategy.
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Keywords: | intermodal transport modelling optimization linear programming receding-horizon control |
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