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The modern locomotives, which are in exploitation in the railway network in Bulgaria, are equipped with electronic devices for registration of analogue and digital running parameters (i.e. the so-called “black boxes” or “recording devices”). Such systems are the Hasler TEL 1000 and the DSK type from KWR. The registration devices used in the older locomotives are not digital, but mechanical. Since...
The paper presented is dedicated to the development and application of sensors and microsystems for evaluating various parameters of rolling stock in motion. The intended purpose of such a system, comprising of the described sensors and microsystems and also known as Wayside Monitoring System for Rolling Stock in Motion, is to identify the current overall condition of the railway vehicles, including...
The paper is dedicated to examination on a specialized tensometric force sensor created and implemented by the authors to improve both the sensor electronic system and metal structure and the technology of sensor manufacturing. The sensors developed are used as a basis to implement a number of facilities for control on wheel load of railway vehicles in a static position. That has led to improvement...
The paper presented is dedicated to developing an electronic measurement system of test stand for evaluating the working condition of springs used in flexi-coil suspensions of railway rolling stock. The intended purpose of the system is to identify the characteristics of the spring being tested. The system identifies the vertical and horizontal load and displacement of the mounting domes of the springs,...
The paper presented is dedicated to developing an electronic measurement and registration system of hydraulic dampers test stand and equipment for the needs of Sofia Metropolitan. The intended purpose of the system is to evaluate the working condition of hydraulic dampers of oscillations by identifying their characteristics with certain accuracy. For that reason the electronic system of the test stand...
The paper presents a model solution for implementing electronic monitoring systems to control the technical condition of vehicles by proper interpretation of the electrical signal experimentally acquired by an accelerometer. Despite the variety of influencing factors, an approach using Wavelet-decomposition of the signal is given to substitute the classical decomposition in Fourier series. The aim...
The paper presented is dedicated to developing an underground train tilting control system acting over the secondary suspension while negotiating curves. The goal is to improve the ride quality while passing curves at relatively high speeds. The system changes the parameters of the secondary suspension depending on the lateral acceleration of the wagon body, running speed and bogie rotation, all measured...
A number of deviations from the theoretical idea of the expected mechanical interaction between railway vehicles and track are observed in the real operation environment. The load transmitted by each wheel in static and dynamic aspects has become an object of increasing interest. A team of experts from the Todor Kableshkov University of Transport and the Technical University of Sofia who participated...
The paper presented is dedicated to developing a simulation model of an electronic system for measuring the load of railway vehicle wheels at an operational speed. The aim is to define the possibility to develop an electronic system for determining the value of force applied to the rail by the wheel on the base of the under-rail fundament reaction. The metrological qualities of the system defined...
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