Svitlana Sapronova - Academia.edu (original) (raw)

Papers by Svitlana Sapronova

All rights reserved. Printed in the United States of America. No part of this publication may be ... more All rights reserved. Printed in the United States of America. No part of this publication may be reproduced, distributed, or transmitted, in any form or by any means, or stored in a data base or retrieval system, without the prior written permission of the publisher. The content and reliability of the articles are the responsibility of the authors. When using and borrowing materials reference to the publication is required. Collection of scientific articles published is the scientific and practical publication, which contains scientific articles of students, graduate students, Candidates and Doctors of Sciences, research workers and practitioners from Europe and Ukraine. The articles contain the study, reflecting the processes and changes in the structure of modern science.

Energies, 2022

This paper deals with the analysis of the operating conditions of traction drives of the electric... more This paper deals with the analysis of the operating conditions of traction drives of the electric locomotives with asynchronous traction motors. The process of change of the catenary system voltage was found to have a stochastic character. The method of current controller synthesis based on the Wiener–Hopf equation was proposed to enable efficient performance of the traction drive control system under the condition of the stochastic nature of the catenary system voltage and the presence of interferences, when measuring the stator current values of the tractor motor. Performance simulation of the proposed current controller and the current controller used in the existing vector control systems of the traction drives used in the electric locomotives was implemented. The results of the performance simulation of the proposed current controller were compared with the performance of the current controller in existing vector control systems of the traction drives. The results are applicabl...

Theoretical foundations of engineering. Tasks and problems, 2021

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2019

Зуб Євген Петрович, аспірант (аспірант кафедри «Вагони та вагонне господарство», Державний універ... more Зуб Євген Петрович, аспірант (аспірант кафедри «Вагони та вагонне господарство», Державний університет інфраструктури та технологій) Сапронова Світлана Юріївна, д.т.н., проф. (професор кафедри «Вагони та вагонне господарство», Державний університет інфраструктури та технологій) Ткаченко Віктор Петрович, д.т.н., проф. (завідувач кафедри «Тяговий рухомий склад залізниць», Державний університет інфраструктури та технологій) АНАЛІЗ СИСТЕМ МОНІТОРИНГУ ПАРАМЕТРІВ ЗНОСУ КОЛІСНИХ ПАР РУХОМОГО СКЛАДУ ЗАЛІЗНИЦЬ В статті проведений аналіз систем контролю технічного стану колісних пар як на залізницях України, так і в світі. Розкрито переваги та недоліки цих систем. Розглянуто принцип дії та складові систем, завдяки яким здійснюється фіксація та контроль параметрів зносу колісних пар. Стаціонарний пристрій для контролю технічного стану колісних пар рухомого складу залізниць, запропонований авторами, особливо актуальний при оперативному виявленні дефектів колісних пар, які є загрозою безпеки руху поїздів. Зроблено висновок про те, що на залізницях України не повною мірою впроваджено повноцінний автоматизований контроль технічного стану колісних пар. Ключові слова: рухомий склад залізниць, колісна пара, поверхня кочення, система моніторингу, контроль параметрів зносу.

In the middle of the 90s the deterioration of wheels flanges and lateral rail surfaces on roads i... more In the middle of the 90s the deterioration of wheels flanges and lateral rail surfaces on roads in the countries of CIS from natural process of wear process of surfaces has turned to the sharp problem which has received the status of a «rail plague». On separate roads the lateral deterioration of rails has reached 1 mm times 10 6 tons, by exceeding a level of normative deterioration in some times. Thus the run of wheel pairs between regrinding on flange undercuts was reduced in by 3-5 times [5]. In the article some ways of elimination of deterioration of wheels and rails are considered. The technique of process modeling of parameters changes of deterioration is offered. ЗАКОНОМЕРНОСТИ ФОРМООБРАЗОВАНИЯ ПРОФИЛЯ КОЛЕСА В ПРОЦЕССЕ ИЗНОСА ПОВЕРХНОСТИ КАТАНИЯ В ЭКСПЛУАТАЦИИ Резюме. В середине 90-х годов износ гребней колес и боковых поверхностей рельсов на дорогах стран СНГ из естественного процесса изнашивания трущихся поверхностей превратился в острую проблему, получившую статус «рельсовой чумы». На отдельных дорогах боковой износ рельсов достиг 1 мм на 106 т, превысив уровень нормативного износа в несколько раз. При этом пробег колесных пар между обточками по подрезу гребня сократился в 3-5 раз [5]. В статье рассмотрены некоторые способы устранения износа колес и рельсов. Предлагается методика моделирования процесса изменения параметров износа.

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies"

The article considers the problems of managing the efficiency of use of production and technologi... more The article considers the problems of managing the efficiency of use of production and technological potential of rolling stock. It is investigated that in order to improve the efficiency of functioning it is necessary to determine the conceptual approaches of the components of the processes of maintenance and operation of rolling stock. This requires the use of technical means and methods of monitoring the technical condition of the wheelsets of the rolling stock. It is investigated that the possibility of successful solution of one of the important tasks of the railway industry risk of improving the quality of repair and restoration works and prolonging the life cycle of rolling stock is possible by ensuring control over finished products and improving process management. It is determined that the form of the concept of conceptual approaches to determining the essence of production and technological potential of maintenance and operation of traction rolling stock is a model of the...

TRANSBALTICA XII: Transportation Science and Technology

Technology audit and production reserves, 2022

The object of research is the electrical processes in the control system of the traction drive of... more The object of research is the electrical processes in the control system of the traction drive of the electric locomotive VL-80K (Russia). To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters determined during experimental studies of the traction drive control system. In particular, it is important to use in the traction drive model the value of the voltages on the arms of the rectifier installation of the electric locomotive, taking into account the position of the driver's controller. The complexity of the simulation lies in the fact that the reference does not provide the value of the voltage on the arms of the rectifier for each position of the driver's controller, which makes it difficult to verify the resulting model. A scheme for measuring the voltage value on the arms of the rectifier installation of an electric locomotive for each position of the position of the driver's controller is proposed. On its basis, a si...

TRANSBALTICA XI: Transportation Science and Technology, 2020

Rail transport performs significant volumes of transportation work and is one of the largest ener... more Rail transport performs significant volumes of transportation work and is one of the largest energy consumers in all developed countries of the world. Most of the energy used in railway transport is spent on train traction. To improve its energy efficiency, it is advisable to carry out measures aimed at reducing the resistance to movement of trains. A special contribution to the creation of resistance to the movement of rail vehicles is made by processes associated with the interaction of the wheel flange with the rail in the case of two-point contact, when additional parasitic differential slip occurs in the ridge contact. It is impossible to avoid this slippage without changing the traditional structural scheme of the wheel (with monolithic production of its supporting and guiding surfaces). The work considers the kinematics of the movement of the ridge along the lateral face of the rail head during rolling of the wheel of the rail carriage. An analytical expression is obtained for the approximate determination of the length of the wheel flange slipping path along the lateral face of the rail head, taking into account the conditions of its contact with the rail. The features of the kinematics of the wheels movement of the traditional and perspective (with the possibility of independent rotation of the bearing surface of the wheel and its guide surface) of the design scheme are analyzed. The levels of work of the friction forces in the ridge contacts of the wheels of different design schemes are determined. The results of the analysis suggest that the use of wheels of a perspective design in the undercarriage of rail vehicles can significantly reduce the kinematic resistance to movement and wear of the contacting surfaces of the wheel and rail by reducing the slip of wheel crests along the side faces of the rail heads.

TRANSBALTICA XI: Transportation Science and Technology, 2020

Symmetry, 2022

The analysis of operating conditions of traction drives of electric locomotives with asynchronous... more The analysis of operating conditions of traction drives of electric locomotives with asynchronous traction motors has been carried out. It was found that during operation in the output converter of an asynchronous motor, defects may occur, which leads to asymmetric modes of its operation. Models of a traction drive of an electric locomotive with asynchronous motors with scalar and vector control of the output converter are proposed, taking into account asymmetric operating modes. As a result of the simulation, the starting characteristics of the traction drive were obtained for various control methods both in normal and emergency modes of the drive. For the drive-in emergency mode, the following cases were investigated: the balance of the converter output voltages and the turn-to-turn circuit of 10% of phase A winding of the motor stator; imbalance of the output voltages of the inverter and an intact motor; imbalance of the output voltages of the converter and interturn short circui...

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2021

The issue of determining the traction and energy characteristics of electric rolling stock with a... more The issue of determining the traction and energy characteristics of electric rolling stock with asynchronous traction drive is considered. It is noted that such rolling stock can work at any point of the traction area, resulting in the need to determine the characteristics of the rolling stock for the entire traction area. The calculation of the characteristics of the traction induction motor, which are the basis for determining the traction and energy characteristics of the electric rolling stock, is considered in detail. A procedure based on the calculation of the replacement circuit of an induction motor is proposed. The calculation of power losses due to higher harmonic voltages and currents is considered. An example of calculation of traction and energy characteristics of an DC electric shunting locomotive with a traction asynchronous electric drive is given.

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2021

The value of the life cycle of rolling stock wheels is determined by the frequency of maintenance... more The value of the life cycle of rolling stock wheels is determined by the frequency of maintenance, in the process of which the turning is carried out to restore the profiles of the rolling surfaces, or the replacement of completely worn wheels. Traffic safety depends on the technical condition of the wheels of locomotives and wagons. Maintenance and repair of wheelsets accounts for about 30% of all costs of Ukrzaliznytsia's rolling stock repair units. Wheel repair technologies are based on the complete restoration of wheel profiles by turning, using which, their life cycle is reduced, and costs increase by 20% or more. The railways of Ukraine use an outdated, unreasonable, inefficient system of control over the formation of rolling surfaces in operation. Therefore, there is a need to create a scientifically sound approach to methods of extending the life cycle of the wheels of locomotives and wagons while ensuring the safety of railway rolling stock. According to the proposed sc...

TRANSBALTICA XI: Transportation Science and Technology, 2020

At the present, metro power supply units used the production and technological potential not to i... more At the present, metro power supply units used the production and technological potential not to its full extent. The main reasons for this situation are the lack of strategies for the effective formation and implementation of management actions aimed at ensuring the necessary level of utilization of the power supply. Appropriate strategies for effective formation and implementation of administrative actions aimed at ensuring the necessary level of utilization of production and technological potential of metro power supply units are considered. On the basis of modern control technologies, a computer system for controlling operating modes of electric networks can be implemented, which ensures increased reliability, energy efficiency and traffic safety. The intellectual system of metro power supply organized this way is a breakthrough assembly of interconnected electric traction networks with computer environment and technologies for its management, consumers, generating capacities and means of protection, united on the basis of modern principles of a single information space, self-regulation, self-renewal, the principle of supporting a united model of primary data, the principle of synchronous information exchange. Carrying out a complex of organizational changes and construction of new process models are planned, along with attraction of new solutions in the field of information technologies, finding new ways and means of informatization, as well as intellectualization of the processes of power supply management [1], implementation of control and reliability forecast, increase of operational efficiency, optimization of power consumption and increase of movement safety and innovations in the field of creation of technological processes automated control system, which requires a qualitatively new level of informatization [2]. Increasing the efficiency of modern information technologies is possible only through research of joint properties of mathematical models, methods, algorithms, management problems, features of modern and advanced network technologies along with architectural features of power supply networks and information management of computer systems.

Technology audit and production reserves, 2021

The object of research is a pulsating current traction motor. To improve the accuracy of its math... more The object of research is a pulsating current traction motor. To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters that are determined in experimental studies of the electric motor. In particular, it is important to use in the model of the electric motor inductance obtained experimentally. A method is proposed for calculating the inductance of the armature winding, main poles, additional poles and compensation winding and the total inductance of the traction motor armature circuit. The calculations are based on the results of the indirect inductance measurement method, in which the electrical values of various modes of power supply of the electric motor windings are directly measured, and the inductances are determined by auxiliary calculations. The inductances of the traction motor armature circuit have a non-linear dependence on the current flowing through them. The main difference of the study is that the measurements of the elect...

Electrical Engineering & Electromechanics, 2021

The aim of the work is to develop a mathematical model of the traction motor of the pulsating cur... more The aim of the work is to develop a mathematical model of the traction motor of the pulsating current of an electric locomotive taking into account the magnetic losses in the motor steel to determine the starting parameters depending on the voltage of the armature winding. Methodology. Mathematical modeling of electromagnetic processes in a traction motor of pulsating current is applied taking into account the nonlinear nature of the armature inductance, the inductance of the excitation winding and the nonlinear nature of the universal magnetic characteristic. The magnetic losses in the steel of the traction motor were taken into account by establishing the dependence of these losses on the frequency of reversal, the magnetic flux in the magnetic circuit of the motor and the geometric dimensions of the motor. Results. The mathematical model of calculation of starting parameters of the traction engine of the pulsating current of the traction drive of the electric locomotive of altern...

Transport Problems, 2007

The term steerability is widely used in the motion theory of wheel and track-laying machines, wat... more The term steerability is widely used in the motion theory of wheel and track-laying machines, water and air vehicles, spacecraft. Steerability is a property of a transport machine to submit to the managing influence. Steerability of the machine is defined by its reaction to managing influence on the part of managing in the form of changing travelling course or lateral kinematical parameters. For example, in automobiles this influence is shown in the turn of a steering wheel, in planes it is a turn of steering wheel or controller handle and so on. Railway vehicles, as known, have no similar bodies of control. The change of the moving is carried out by a rail track under the influence of horizontal travelling forces. Using the terminology from the control of wheel carriers, the author considers qualitative parameters of steerability of rail vehicles, connecting them with additional influence on vehicles of the railway in the process of control.

S u m m a r y . The article is devoted to justifying the choice of admissible tread wheels profil... more S u m m a r y . The article is devoted to justifying the choice of admissible tread wheels profile parameters and control technology improvement of locomotive wheels flange wear parameters. The authors conclude that the rational choice of admissible wear parameters depend strongly on the technical and economic performance of the rolling stock, namely mileage wheelset turning between bands, the total number of tires turning life cycle, overall tires life. K e y w o r d s : Railway locomotive wheel sets, tires, wheel profiles, wear parameters, ridge thickness parameter.

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2020

In order to ensure the uninterrupted performance of passenger traffic, the task of ensuring the o... more In order to ensure the uninterrupted performance of passenger traffic, the task of ensuring the operation of rolling stock outside the extended service life, including passenger cars for the carriage of passengers, remains relevant. Based on this, there is a need for comprehensive research aimed at substantiating the possibility of ensuring operation while maintaining dynamic and strength characteristics. The article examines the residual life of load-bearing metal structures of passenger cars based on the results of technical diagnostics and standard tests. It is concluded that the condition of the load-bearing metal structures of passenger cars built by the Kryukiv Carriage Plant (KСP) after long operation does not approach the limit. The obtained practical and theoretical results make it possible to extend the service life of passenger cars for the construction of KCP beyond the factory set by 41 years.

All rights reserved. Printed in the United States of America. No part of this publication may be ... more All rights reserved. Printed in the United States of America. No part of this publication may be reproduced, distributed, or transmitted, in any form or by any means, or stored in a data base or retrieval system, without the prior written permission of the publisher. The content and reliability of the articles are the responsibility of the authors. When using and borrowing materials reference to the publication is required. Collection of scientific articles published is the scientific and practical publication, which contains scientific articles of students, graduate students, Candidates and Doctors of Sciences, research workers and practitioners from Europe and Ukraine. The articles contain the study, reflecting the processes and changes in the structure of modern science.

Energies, 2022

This paper deals with the analysis of the operating conditions of traction drives of the electric... more This paper deals with the analysis of the operating conditions of traction drives of the electric locomotives with asynchronous traction motors. The process of change of the catenary system voltage was found to have a stochastic character. The method of current controller synthesis based on the Wiener–Hopf equation was proposed to enable efficient performance of the traction drive control system under the condition of the stochastic nature of the catenary system voltage and the presence of interferences, when measuring the stator current values of the tractor motor. Performance simulation of the proposed current controller and the current controller used in the existing vector control systems of the traction drives used in the electric locomotives was implemented. The results of the performance simulation of the proposed current controller were compared with the performance of the current controller in existing vector control systems of the traction drives. The results are applicabl...

Theoretical foundations of engineering. Tasks and problems, 2021

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2019

Зуб Євген Петрович, аспірант (аспірант кафедри «Вагони та вагонне господарство», Державний універ... more Зуб Євген Петрович, аспірант (аспірант кафедри «Вагони та вагонне господарство», Державний університет інфраструктури та технологій) Сапронова Світлана Юріївна, д.т.н., проф. (професор кафедри «Вагони та вагонне господарство», Державний університет інфраструктури та технологій) Ткаченко Віктор Петрович, д.т.н., проф. (завідувач кафедри «Тяговий рухомий склад залізниць», Державний університет інфраструктури та технологій) АНАЛІЗ СИСТЕМ МОНІТОРИНГУ ПАРАМЕТРІВ ЗНОСУ КОЛІСНИХ ПАР РУХОМОГО СКЛАДУ ЗАЛІЗНИЦЬ В статті проведений аналіз систем контролю технічного стану колісних пар як на залізницях України, так і в світі. Розкрито переваги та недоліки цих систем. Розглянуто принцип дії та складові систем, завдяки яким здійснюється фіксація та контроль параметрів зносу колісних пар. Стаціонарний пристрій для контролю технічного стану колісних пар рухомого складу залізниць, запропонований авторами, особливо актуальний при оперативному виявленні дефектів колісних пар, які є загрозою безпеки руху поїздів. Зроблено висновок про те, що на залізницях України не повною мірою впроваджено повноцінний автоматизований контроль технічного стану колісних пар. Ключові слова: рухомий склад залізниць, колісна пара, поверхня кочення, система моніторингу, контроль параметрів зносу.

In the middle of the 90s the deterioration of wheels flanges and lateral rail surfaces on roads i... more In the middle of the 90s the deterioration of wheels flanges and lateral rail surfaces on roads in the countries of CIS from natural process of wear process of surfaces has turned to the sharp problem which has received the status of a «rail plague». On separate roads the lateral deterioration of rails has reached 1 mm times 10 6 tons, by exceeding a level of normative deterioration in some times. Thus the run of wheel pairs between regrinding on flange undercuts was reduced in by 3-5 times [5]. In the article some ways of elimination of deterioration of wheels and rails are considered. The technique of process modeling of parameters changes of deterioration is offered. ЗАКОНОМЕРНОСТИ ФОРМООБРАЗОВАНИЯ ПРОФИЛЯ КОЛЕСА В ПРОЦЕССЕ ИЗНОСА ПОВЕРХНОСТИ КАТАНИЯ В ЭКСПЛУАТАЦИИ Резюме. В середине 90-х годов износ гребней колес и боковых поверхностей рельсов на дорогах стран СНГ из естественного процесса изнашивания трущихся поверхностей превратился в острую проблему, получившую статус «рельсовой чумы». На отдельных дорогах боковой износ рельсов достиг 1 мм на 106 т, превысив уровень нормативного износа в несколько раз. При этом пробег колесных пар между обточками по подрезу гребня сократился в 3-5 раз [5]. В статье рассмотрены некоторые способы устранения износа колес и рельсов. Предлагается методика моделирования процесса изменения параметров износа.

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies"

The article considers the problems of managing the efficiency of use of production and technologi... more The article considers the problems of managing the efficiency of use of production and technological potential of rolling stock. It is investigated that in order to improve the efficiency of functioning it is necessary to determine the conceptual approaches of the components of the processes of maintenance and operation of rolling stock. This requires the use of technical means and methods of monitoring the technical condition of the wheelsets of the rolling stock. It is investigated that the possibility of successful solution of one of the important tasks of the railway industry risk of improving the quality of repair and restoration works and prolonging the life cycle of rolling stock is possible by ensuring control over finished products and improving process management. It is determined that the form of the concept of conceptual approaches to determining the essence of production and technological potential of maintenance and operation of traction rolling stock is a model of the...

TRANSBALTICA XII: Transportation Science and Technology

Technology audit and production reserves, 2022

The object of research is the electrical processes in the control system of the traction drive of... more The object of research is the electrical processes in the control system of the traction drive of the electric locomotive VL-80K (Russia). To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters determined during experimental studies of the traction drive control system. In particular, it is important to use in the traction drive model the value of the voltages on the arms of the rectifier installation of the electric locomotive, taking into account the position of the driver's controller. The complexity of the simulation lies in the fact that the reference does not provide the value of the voltage on the arms of the rectifier for each position of the driver's controller, which makes it difficult to verify the resulting model. A scheme for measuring the voltage value on the arms of the rectifier installation of an electric locomotive for each position of the position of the driver's controller is proposed. On its basis, a si...

TRANSBALTICA XI: Transportation Science and Technology, 2020

Rail transport performs significant volumes of transportation work and is one of the largest ener... more Rail transport performs significant volumes of transportation work and is one of the largest energy consumers in all developed countries of the world. Most of the energy used in railway transport is spent on train traction. To improve its energy efficiency, it is advisable to carry out measures aimed at reducing the resistance to movement of trains. A special contribution to the creation of resistance to the movement of rail vehicles is made by processes associated with the interaction of the wheel flange with the rail in the case of two-point contact, when additional parasitic differential slip occurs in the ridge contact. It is impossible to avoid this slippage without changing the traditional structural scheme of the wheel (with monolithic production of its supporting and guiding surfaces). The work considers the kinematics of the movement of the ridge along the lateral face of the rail head during rolling of the wheel of the rail carriage. An analytical expression is obtained for the approximate determination of the length of the wheel flange slipping path along the lateral face of the rail head, taking into account the conditions of its contact with the rail. The features of the kinematics of the wheels movement of the traditional and perspective (with the possibility of independent rotation of the bearing surface of the wheel and its guide surface) of the design scheme are analyzed. The levels of work of the friction forces in the ridge contacts of the wheels of different design schemes are determined. The results of the analysis suggest that the use of wheels of a perspective design in the undercarriage of rail vehicles can significantly reduce the kinematic resistance to movement and wear of the contacting surfaces of the wheel and rail by reducing the slip of wheel crests along the side faces of the rail heads.

TRANSBALTICA XI: Transportation Science and Technology, 2020

Symmetry, 2022

The analysis of operating conditions of traction drives of electric locomotives with asynchronous... more The analysis of operating conditions of traction drives of electric locomotives with asynchronous traction motors has been carried out. It was found that during operation in the output converter of an asynchronous motor, defects may occur, which leads to asymmetric modes of its operation. Models of a traction drive of an electric locomotive with asynchronous motors with scalar and vector control of the output converter are proposed, taking into account asymmetric operating modes. As a result of the simulation, the starting characteristics of the traction drive were obtained for various control methods both in normal and emergency modes of the drive. For the drive-in emergency mode, the following cases were investigated: the balance of the converter output voltages and the turn-to-turn circuit of 10% of phase A winding of the motor stator; imbalance of the output voltages of the inverter and an intact motor; imbalance of the output voltages of the converter and interturn short circui...

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2021

The issue of determining the traction and energy characteristics of electric rolling stock with a... more The issue of determining the traction and energy characteristics of electric rolling stock with asynchronous traction drive is considered. It is noted that such rolling stock can work at any point of the traction area, resulting in the need to determine the characteristics of the rolling stock for the entire traction area. The calculation of the characteristics of the traction induction motor, which are the basis for determining the traction and energy characteristics of the electric rolling stock, is considered in detail. A procedure based on the calculation of the replacement circuit of an induction motor is proposed. The calculation of power losses due to higher harmonic voltages and currents is considered. An example of calculation of traction and energy characteristics of an DC electric shunting locomotive with a traction asynchronous electric drive is given.

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2021

The value of the life cycle of rolling stock wheels is determined by the frequency of maintenance... more The value of the life cycle of rolling stock wheels is determined by the frequency of maintenance, in the process of which the turning is carried out to restore the profiles of the rolling surfaces, or the replacement of completely worn wheels. Traffic safety depends on the technical condition of the wheels of locomotives and wagons. Maintenance and repair of wheelsets accounts for about 30% of all costs of Ukrzaliznytsia's rolling stock repair units. Wheel repair technologies are based on the complete restoration of wheel profiles by turning, using which, their life cycle is reduced, and costs increase by 20% or more. The railways of Ukraine use an outdated, unreasonable, inefficient system of control over the formation of rolling surfaces in operation. Therefore, there is a need to create a scientifically sound approach to methods of extending the life cycle of the wheels of locomotives and wagons while ensuring the safety of railway rolling stock. According to the proposed sc...

TRANSBALTICA XI: Transportation Science and Technology, 2020

At the present, metro power supply units used the production and technological potential not to i... more At the present, metro power supply units used the production and technological potential not to its full extent. The main reasons for this situation are the lack of strategies for the effective formation and implementation of management actions aimed at ensuring the necessary level of utilization of the power supply. Appropriate strategies for effective formation and implementation of administrative actions aimed at ensuring the necessary level of utilization of production and technological potential of metro power supply units are considered. On the basis of modern control technologies, a computer system for controlling operating modes of electric networks can be implemented, which ensures increased reliability, energy efficiency and traffic safety. The intellectual system of metro power supply organized this way is a breakthrough assembly of interconnected electric traction networks with computer environment and technologies for its management, consumers, generating capacities and means of protection, united on the basis of modern principles of a single information space, self-regulation, self-renewal, the principle of supporting a united model of primary data, the principle of synchronous information exchange. Carrying out a complex of organizational changes and construction of new process models are planned, along with attraction of new solutions in the field of information technologies, finding new ways and means of informatization, as well as intellectualization of the processes of power supply management [1], implementation of control and reliability forecast, increase of operational efficiency, optimization of power consumption and increase of movement safety and innovations in the field of creation of technological processes automated control system, which requires a qualitatively new level of informatization [2]. Increasing the efficiency of modern information technologies is possible only through research of joint properties of mathematical models, methods, algorithms, management problems, features of modern and advanced network technologies along with architectural features of power supply networks and information management of computer systems.

Technology audit and production reserves, 2021

The object of research is a pulsating current traction motor. To improve the accuracy of its math... more The object of research is a pulsating current traction motor. To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters that are determined in experimental studies of the electric motor. In particular, it is important to use in the model of the electric motor inductance obtained experimentally. A method is proposed for calculating the inductance of the armature winding, main poles, additional poles and compensation winding and the total inductance of the traction motor armature circuit. The calculations are based on the results of the indirect inductance measurement method, in which the electrical values of various modes of power supply of the electric motor windings are directly measured, and the inductances are determined by auxiliary calculations. The inductances of the traction motor armature circuit have a non-linear dependence on the current flowing through them. The main difference of the study is that the measurements of the elect...

Electrical Engineering & Electromechanics, 2021

The aim of the work is to develop a mathematical model of the traction motor of the pulsating cur... more The aim of the work is to develop a mathematical model of the traction motor of the pulsating current of an electric locomotive taking into account the magnetic losses in the motor steel to determine the starting parameters depending on the voltage of the armature winding. Methodology. Mathematical modeling of electromagnetic processes in a traction motor of pulsating current is applied taking into account the nonlinear nature of the armature inductance, the inductance of the excitation winding and the nonlinear nature of the universal magnetic characteristic. The magnetic losses in the steel of the traction motor were taken into account by establishing the dependence of these losses on the frequency of reversal, the magnetic flux in the magnetic circuit of the motor and the geometric dimensions of the motor. Results. The mathematical model of calculation of starting parameters of the traction engine of the pulsating current of the traction drive of the electric locomotive of altern...

Transport Problems, 2007

The term steerability is widely used in the motion theory of wheel and track-laying machines, wat... more The term steerability is widely used in the motion theory of wheel and track-laying machines, water and air vehicles, spacecraft. Steerability is a property of a transport machine to submit to the managing influence. Steerability of the machine is defined by its reaction to managing influence on the part of managing in the form of changing travelling course or lateral kinematical parameters. For example, in automobiles this influence is shown in the turn of a steering wheel, in planes it is a turn of steering wheel or controller handle and so on. Railway vehicles, as known, have no similar bodies of control. The change of the moving is carried out by a rail track under the influence of horizontal travelling forces. Using the terminology from the control of wheel carriers, the author considers qualitative parameters of steerability of rail vehicles, connecting them with additional influence on vehicles of the railway in the process of control.

S u m m a r y . The article is devoted to justifying the choice of admissible tread wheels profil... more S u m m a r y . The article is devoted to justifying the choice of admissible tread wheels profile parameters and control technology improvement of locomotive wheels flange wear parameters. The authors conclude that the rational choice of admissible wear parameters depend strongly on the technical and economic performance of the rolling stock, namely mileage wheelset turning between bands, the total number of tires turning life cycle, overall tires life. K e y w o r d s : Railway locomotive wheel sets, tires, wheel profiles, wear parameters, ridge thickness parameter.

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2020

In order to ensure the uninterrupted performance of passenger traffic, the task of ensuring the o... more In order to ensure the uninterrupted performance of passenger traffic, the task of ensuring the operation of rolling stock outside the extended service life, including passenger cars for the carriage of passengers, remains relevant. Based on this, there is a need for comprehensive research aimed at substantiating the possibility of ensuring operation while maintaining dynamic and strength characteristics. The article examines the residual life of load-bearing metal structures of passenger cars based on the results of technical diagnostics and standard tests. It is concluded that the condition of the load-bearing metal structures of passenger cars built by the Kryukiv Carriage Plant (KСP) after long operation does not approach the limit. The obtained practical and theoretical results make it possible to extend the service life of passenger cars for the construction of KCP beyond the factory set by 41 years.