Modeling of moving block signaling system using fuzzy Petri net

Document Type : Research Paper

Authors

1 Electrical and Computer Engineering Faculty Semnan university

2 Electrical and Computer Engineering Faculty, Semnan University

Abstract

The signaling system as one of the main components of the railway network, has a decisive role in the capacity of the lines and the headway of the trains as two major indicators in evaluating the performance and safety of the railway networks. The dynamic safety distance in the moving block signaling system and its adjustment based on the position and speed of trains is a suitable approach to optimally use the capacity of railway network lines and reduce the headway of trains. In this article using the fuzzy Petri net, a model of block in the railway signaling system and the simultaneous dispatch of several trains in a fixed block has been presented. In fact, by using the fuzzy Petri net, a moving block structure is considered next to the existing fixed block. For this purpose, a decision is made by defining control variables and fuzzy membership functions for them and defining fuzzy rules, taking into account the safety requirements regarding the permission or lack of permission for the follower train to enter a block. The main innovation of this method is to provide the possibility of benefiting from the benefits of the moving block system without the need to change the previous system and as a result increase the reliability compared to the moving block. From the results of this method, we can mention the increase of network capacity and reduction of headway train.

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Main Subjects

Journal of Transportation Infrastructure Engineering
Volume 9, Issue 4 - Serial Number 36
December 2023
Pages 126-105

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History

  • Receive Date: 03 December 2023
  • Revise Date: 03 January 2024
  • Accept Date: 16 January 2024

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