Purpose. The main purpose of the work is to reduce the time for analysis and increase the efficiency of processing statistical information on assessing the locomotive fleet operation through the use of methods to reduce the data dimensionality. Methodology. To conduct the study, the methodology for constructing an arbitrary process index was chosen. Using the methodology allows selecting from the total set of parameters those components that are the most informative. Using the method of hierarchies analysis based on the obtained main components, it is possible to construct a single generalizing indicator. Findings. The approaches to improving the existing system of indicators for accounting the operation of locomotives were analyzed. The expediency of using dimensionality reduction methods to analyze the locomotive operation was substantiated. Using the method of main components, the most informative indicators of locomotive operation and the degree of their influence on the general level of traffic safety in locomotive economy, the implementation of the maintenance system are determined. The examples of the analysis of locomotive economy indicators using the proposed methodology, index of performance of maintenance system, traffic safety indices and operational safety in locomotive economy are given. The locomotive economy was analyzed through a joint review of the proposed integrated indices, as well as quantitative and qualitative indicators of the locomotive use. The difference between these indicators shows a deterioration or improvement in the traffic safety state, taking into account the volume of work performed. Increase in the operational traffic safety coefficient over the safety index shows a deterioration in the traffic safety state, despite a decrease in the absolute values of indicators characterizing the level of traffic safety in locomotive economy. Originality. For the first time, it was proposed to evaluate the traffic safety state in locomotive economy through the difference between the traffic safety and operational safety indices. Practical value. To analyze the operation of locomotive fleet, it is advisable to use the methods to reduce the data dimensionality. To assess the traffic safety state, it is more advisable to use the operational safety index, since it takes into account the volumetric performance indicators of locomotive economy.

Purpose. In modern conditions of rolling stock operation, the actual vital task is the increasing the efficiency of its use by reducing the cost of energy, including for the traction. It can be achieved by the way of locomotives power control systems creating, in particular the use of operating cards and on-board software and hardware. Methodo-logy. The article discusses ways of starting and acceleration of the train. Traction calculations with the definition of energy-efficient trajectories provide the search of a rational consumption of energy with time of running trains. When selecting energy saving train trajectories and the development of operating trains of reference cards, it is necessary to consider the variables such as: the profile area, weight of the stock, series of the locomotive and others. When the transmission power from the primary power equipment to the driving wheel pairs the inevitable losses that are described by the efficiency factor occur. For the most part of the locomotive elements the dependences of the efficiency factor are described by the nonlinear equations. Getting the energy-saving function of traction control at starting and acceleration to reduce the specific consumption of energy by improving the algorithm for calculating the trajectories of multiple trains was considered. The method of selection of energy-efficient trajectories at dispersal trains and power control electric and diesel locomotives with electric transmission which bases on the mathematical methods for evenly search and parametric optimization was offered. Findings. For the variables of the train situation and rolling stock was built two-parameter functional dependence of the power control locomotive and analytically determined the effectiveness of the proposed algorithm. Originality. In the work result the authors received the power saving function of traction control, which depends on the mass of the rolling stock and slant. In contrast to existing development of rational management of trains, this function requires much less computer time with a high accuracy of the calculations, which makes it possible to incorporate it into the onboard control system of the locomotive and energy savings. Practical value. Experimentally established algorithm, which is part of the on-board software package definition of energy-saving modes of conducting trains, will contribute to the reduction of energy expenses.

Наука та прогрес транспорту. Вісник Дніпропетровського національного університету залізничного транспорту, 2013, вип. 3 (45)

Purpose. The article describes the most common methods for determining the locomotive traction force. Solving the tasks of traction calculations involves determination of the forces influencing the train at every point of the way. When choosing a rational trajectory of the train motion and the development of operational regulations of train driving it is necessary to determine the actual value of the locomotive traction force. Considering various factors, power value of traction electric motor of locomotive may have significant differences. Advancement of the operational definition system of the locomotive traction force during the calculations by electrical parameters of traction electric motor with regard to uneven load of wheel-motor block is the purpose of the article. Methodology. The method of determining the traction force of locomotives and diesel locomotives with electric transmission, which is based on primary data acquisition of traction electric engines of direct current behavior, was proposed. Sensors and their integration into the electrical circuitry of the locomotive in order to get the data in digital form and for operational calculation of the each traction motor mode and the definition of locomotive traction force are presented. Findings. The experimental investigation of the system of locomotive traction force determination with the electric traction motor ED-105 was offered. A comparison of electrical and mechanical power of the electric motor was conducted. Originality. The system of locomotives power operational definition, which takes into account the variable electro-mechanical factors of wheel and motor blocks and increases the accuracy of the calculations, was proposed. Practical value. The system is a part of an onboard complex in definition of energy-efficient regimes for trains movement and provides the definition of accelerating and decelerating forces.

Наука та прогрес транспорту. Вісник Дніпропетровського національного університету залізничного транспорту, 2013, вип. 5 (47) ЕКСПЛУАТАЦІЯ ТА РЕМОНТ ЗАСОБІВ ТРАНСПОРТУ © В. Ф. Ивин, Б. Е. Боднарь, 2013 викидів енергогенеруючих підприємств. Практична значимість. У роботі показано, що покриття поверхні басейну низькотеплопровідним покриттям, легким у монтажі, дозволяє знизити реальні тепловтрати як мінімум у 5-6 разів і зменшити шкідливі викиди електростанцій, які виробляють енергію для підігріву басейна. Ключові слова: енергозбереження; економія енергоресурсів; відкриті плавальні басейни; забруднення навколишнього середовища