Failure Risk Assessment of Railway Transponder Transmission System Under Lightning Transient Electromagnetic Disturbance

To assess the electromagnetic susceptibility of railway signal systems subjected to lightning transient electromagnetic disturbance, a set of authentic experimental platform was designed and constructed in a laboratory setting, utilizing the railway transponder transmission system as the test subject. This experimental platform assesses the electromagnetic susceptibility of the railway transponder transmission system under varying lightning surge voltages. The results indicate that the system demonstrates varying response patterns at different degrees of electromagnetic disturbance, including normal operation, the emergence of erroneous codes with self-recovery, and the emergence of erroneous codes with requiring a restart of the equipment to return to normal operation. A set of improved support vector machine models is created and trained using the experimental dataset to evaluate the probability of telegram signal errors caused by lightning transient electromagnetic disturbance in railway transponder transmission system. The test results of the model indicated that the prediction accuracy could reach <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{9 3. 7 9 \%}$</tex>. Finally, this paper gives a revised evaluation method under the condition of low dimensionality of features.