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Dr. Jack Zhang Centre for Railway Engineering

Central Queensland University

The paper presents a Matlab/Simulink based simulator for tract circuit in railway signalling system. The sub-systems in this simulator includes the simulink models for running rails, transmitter, receiver, boosting unit, train occupation and termination circuit. Both time domain waveform and frequency domain spectrum in the track circuit can be observed on the computer screen. To investigate the impact of train position on the receiver signals, the running rail model for a fixed track length is implemented as two variable length track circuit, separated by the moving train. The impacts of track length, boosting unit, and carrier frequency can also be investigated by means of this simulator.