Abstract
In modern practice of operating under traffic safety conditions, the traffic light signal must be transmitted to the locomotive that moves to it, and duplicate in the driver’s cab. However, this communication channel is not protected from external interference. In order to prevent the occurrence of code failure, it is necessary to create conditions under which the automatic locomotive signalling system will distinguish between signals with useful information, from signals with false information. The best way to solve this problem at the first stage is to model the devices. Using the simulation tools of graphical environment of simulation modelling Simulink from Matlab software environment, the software model of the communication channel between the railroad and the input devices of automatic locomotive signalling system was constructed. The created mathematical model with the actual parameters allows us to obtain diagnostic signs of a proper condition, on the basis of which the research is aimed at the identification, recognition and definition of various types of malfunctions, failure, damages and defects in the work of the constituent elements of the system and the signal transmission channel of the automatic locomotive signalling system.
Highlights
In modern practice of operating under traffic safety conditions, the traffic light signal must be transmitted to the locomotive that moves to it, and duplicate in the driver's cab
According to the work results of the mathematical model of the communication channel between the input devices of the system of automatic locomotive signalling of a continuous type with numerical coding in the form of an equivalent circuit for replacing a filter with a frequency of 50 Hz and a track circle, on which the signal current flows, it can be established that the signal at the output of the model satisfactorily coincides with real measurements, which testifies to the adequacy of the built system
On the basis of the analysis of the structure and functioning of the devices of the ALSN system, a mathematical model of the communication channel of its input devices with the ALSN rail line was developed taking into account the mutual inductance between the rails and the locomotive receiving coils
Summary
In modern practice of operating under traffic safety conditions, the traffic light signal must be transmitted to the locomotive that moves to it, and duplicate in the driver's cab This problem is performed on most main lines by automatic locomotive signalling of a continuous type with numerical coding (ALSN). In accordance with the procedure of interaction, the locomotive brigade reports about detecting a violation in the ALSN system during traffic to employees of the traffic service, which record the case and transmit information for consideration by employees of the signalling and communication service Employees of this service inspect the place where the codes failed, and check the voltage in the track circle. Let’s conduct research of ALSN work by constructing a mathematical model of the communication channel of its input devices with a rail line
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