Author(s)

R.J. Hill & M.L. Berova

Abstract

This paper describes the development of a computer-aided engineering tool for the simulation of audio-frequency jointless track circuits under various operating conditions. The simulator includes track circuit physical and functional models, a mathematical formulation, a computer implementation and a validation procedure. Application of the model is demonstrated by simulation results using a practical audio-frequency jointless track circuit. Introduction Despite the ascendancy of transmission-based signalling systems with alternative methods of train detection and track - train data transmission, track circuits are likely to remain the principal method of train detection for urban and high-speed railways for a considerable time. Track circuits are undergoing continuous improvement and development to optim

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