Showing papers by "A. El Moudni published in 2011"

Study of the high-speed trains positioning system: European signaling system ERTMS / ETCS

Abstract: The signaling system ERTMS/ECTS (European Rail Traffic Management System/ European Train Control System) have been created in order to standardize the European railway signal. ERTMS/ETCS permits safe control of the European railway. Hence, the train detection systems must provide the signaling system with adequate information regarding the position and movement of trains. This paper describes a colored Petri nets model of the train movement and localization on a railway track equipped with the second level of the signaling system ERTM. This operation is difficult to model, because it depends on the onboard and trackside ERTMS sub-systems, which communicate with each other. Especially, Eurobalises implemented on the track and acting as position markers, and the odometer who estimates the train position.

Hoist Scheduling for multi-part CHSP in complex lines' configuration

Abstract: The performance of an enterprise largely depends on the schedule of its resources. A good schedule may increase the output rate and reduce the production costs. Therefore, in this paper, we consider the cyclic schedule of hoist activities in automated electroplating lines which is commonly known as Cyclic Hoist Scheduling Problem (CHSP). The CHSPs appear in the manufacturing facilities to achieve a mass production and to search a repetitive sequence of moves for the hoist. In such kind of lines, hoist is used for moving electroplates through a line of tanks containing chemical baths. In this paper, we extend our elaborated 2-degree cyclic linear model to a more complex configuration of the production lines.