The paper describes the structure of a hardware and software complex for monitoring and diagnostics of the contact network, provides information about the hardware blocks of the complex, considers its implementation in Matlab/Simulink, describes the regularities of change of vibration frequency under different values of tension and the linear mass of wires.

The paper discusses the technology of designing a monitoring system for power transformers and power supply devices, based on the use of sensor networks, describes the creation of a Bayesian network to predict the probability of failure. Conditions for achieving the maximum diagnostic efficiency with the required accuracy are formulated. A diagnostic system is proposed that allows assessing the influence of each parameter on the accuracy of predicting failures. Using the method of expert assessments, the possibility to calculate the probabilities of failures with a lack of information is shown.

The long-term development program of the Russian Railways holding provides for a comprehensive modernization of the railway infrastructure by The least expensive of these measures is the use of contact elements with an extended service life, providing reliable, economical and environmentally friendly transmission of electricity to rolling stock. In accordance with the program developed and successfully tested at OSTU, the methodology for conducting experimental studies of contact pairs of current collector devices for conducting a test cycle requires specialized experimental complexes, as well as significant time and resources. To reduce the volume of experimental studies, a combined method is used - a combination of the required minimum of experimental studies of real objects (or their analogues) and calculation methods based on mathematical modeling of processes occurring in contact pairs of current collector devices. However, the use of existing mathematical models for predicting wear under conditions of very high-speed movement is not accurate enough due to the lack of consideration of the aerodynamic effects and the speed of the rolling stock on current collection processes. This article discusses the improvement of the electrical component of the wear model of the elements of contact pairs of current collector devices under conditions of very high-speed movement. The histograms of the electrical wear of contact elements obtained by calculation using the existing and improved mathematical models are presented.

The paper considers the main stages of development of a computer model of current collectors of an electric rolling stock. The original description of the kinematic scheme of a universal measuring current collector with the subsequent implementation of mathematical model in Matlab SimMechanics environment is offered. The model is based on the use of the method of homogeneous coordinates to represent the kinematic scheme of the current collector. It is shown that the computer model accurately and adequately describes the processes occurring with the current collector, is a universal instrument for simulating any types of current collectors, allows changing a wide range of parameters and characteristics incorporated in it.

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