Browsing by Author "Yehorov, Oleh I."

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Computer architecture
(Ukrainian State University of Science and Technologies, Dnipro, 2023) Yehorov, Oleh I.; Dziuba, Volodymyr V.; Ivin, Pavlo
ENG: Methodical recommendations are intended for students of the 3rd year of the specialty 123 "Computer engineering" to prepare for practical work in the discipline "Computer architecture".
Computer Architecture
(Ukrainian State University of Science and Technologies, 2024) Kosolapov, Anatolyi; Yehorov, Oleh I. ; Tymoshenko, Liudmyla
ENG: Educational and methodical recommendations are intended for students of the 3rd year of the specialty 123 "Computer Engineering" to prepare for the coursework in the discipline "Computer Architecture". Educational and methodological recommendations contain the main theoretical provisions for mastering the material, instructions for performing coursework, requirements for analysis of results and design of works.
Selection of Optimal Lithium Battery Technology for Backup Power Supply of Automatics Systems in Railway Transport
(Printing House “Technologija”, Kaunas, Lithuania, 2024) Buriak, Serhii Yu.; Gololobova, Oksana O.; Serdiuk, Tetiana M.; Voznyak, Oleh M.; Yehorov, Oleh I.; Manachyn, Ivan O.; Radzikhovskyi, Kostiantyn
ENG: The article presents the results of the research into batteries based on lithium technology. An analysis of all the most widely represented lithium battery technologies was carried out with an assessment of their main parameters. The research was aimed at studying the performance characteristics of the six most common technologies for the production of chemical power sources using lithium, which are currently the most developed and are manufactured on a mass production scale. A comparative analysis showed that the features of each of them should be taken into account in order to optimize the choice of parameters for batteries with different technologies when solving various industrial and household problems, since this approach will make it possible to further use their differences with the greatest efficiency. The most suitable areas for practical application of each type of lithium battery are given, taking into account the individual characteristics of their performance. Also, from a practical point of view of highly efficient use of electrical energy storage devices, as a constant consumer of especially large volumes of energy carriers, the transport industry is considered, which has a great interest in improving technologies in order to improve the quality of equipment, increase the safety of the transportation process and the economic efficiency of the type of activity being carried out. This analysis was carried out using the example of their use in backup power supply systems for railway automatics devices. The advantages of replacing backup power sources based on the traditional method of storing electrical energy using lead-acid batteries with batteries made using lithium technology are shown. At the same time, to determine the appropriate technology, the specifics of the application conditions were first taken into account, since this type of energy source belongs to the category of guaranteed energy supply. The research results obtained allow us to compare lithium batteries to identify selection criteria for specific tasks based on their performance characteristics.
Synergy of Systems - Socio-Cyber-Physical Systems (SCPS)
(ScientificWorld-NetAkhatAV, Karlsruhe, Germany, 2024) Parpаlita, Alexander; Yehorov, Oleh I.; Kosolapov, Anatolii A.
UKR: Розглядаються історичні аспекти еволюції комп'ютерних систем та зміна парадигм комп'ютеризації. Надається визначення кіберфізичних систем та їх склад, загальна специфікація промислових СКПІС.Розглядається розширена концепція архітектури соціо-кібер-фізичних систем.
The Use of the Experiment Planning Method to Evaluate the Accuracy of flexible Units Identification
(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Yehorov, Oleh I.
EN: Purpose. The identification of rolling stock on the railroads is an integral part of many automation systems as trains in general and cars separately. Various information management systems at sorting yards require the operational information about the object while performing the manufacturing operations. The improvement of the determination accuracy of different parameters characterizing the rolling stock, leads to the immediate quality progress in the traffic volumes management. The aim of the paper is to develop a method to estimate the errors of determination the interaxle distance of the flexible units in the control section using the point path-control transducer for future identification of cars and locomotives. Methodology. To achieve this goal the simulation method and experiment planning were used. The simulation model allowing determining the time intervals between the collisions of wheelset of movable units in point path-control transducer on the control section with variable characteristics of identification devices was developed. The values of the time intervals obtained with using the simulation mode were applied in the method of experiment planning to the final target. Findings. The calculated analytical values of the errors of the interaxle distances do not have the significant differences from values obtained using the simulation model. It makes possible to use the received functional dependence to estimate the possible errors in the identification of rolling stock. The results of this work can be used to identify separate flexible units, and trains in general. Originality.The functional dependence of the error of the interaxle distance error from the fixing point of the wheel path-control transducer, the distance between the sensors and the measured distance was derived using a previously conducted research of the factors influencing the error in determining the interaxle distance of the movable units, and developed simulation model to calculate the interaxle distance. Practical value. This functional dependence allows solving the following tasks: to calculate the maximum possible error of determining the interaxle distance of the movable units at known parameters of control section and calculation of parameters of the control section, when the possible acceptable error of determining the interaxle distance of the flexible units is known.