Кафедра "Локомотиви"

Permanent URI for this communityhttp://crust.ust.edu.ua/handle/123456789/659

UKR: У ЦЮ СПІЛЬНОТУ ДАНІ НЕ ДОДАЮТЬСЯ
У 2026 р. ця кафедра увійшла до складу кафедри "Управління та експлуатація рухомого складу"

ENG: The department "Locomotives".
In 2026, this department became part of the Department of Rolling Stock Management and Operation

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Now showing 1 - 3 of 3

Classification of Quality Conditions of a Traction Motor Frame Insulation of Locomotives
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kapitsa, Michail І.; Laguta, Vasiliy V.; Kozik, Yuriy
ENG: Abstract. The objective of the article is to determine the quality conditions of a locomotive traction motor frame insulation based on observations over the recovery voltage and classification of a tested insulation wear degree as well as to determine estimates of operating time until the insulation restoration or replacement with a new one. To classify the insulation quality conditions and to forecast its residual life until the restoration, a cluster analysis and discriminant analysis are used based on indicators reflecting the properties of an insulation recovery voltage curve. The study defines an information content received from frame insulation recovery voltage readings as compared with its resistance from the perspective of testing the insulation condition and predicting its residual life. Statistical characteristics of clusters corresponding to the insulation condition stages allow determining the limit values of predicting parameters and estimating the residual insulation life prior the restoration. To classify the insulation condition, an integrated evaluation of the insulation condition quality is proposed. Integrated evaluation is performed according to the recovery voltage curve and is used as an indicator during clustering. An experimental study of the proposed method practically confirmed its effectiveness.
Selecting the Parameters of The Diagnosis of Frame Insulation Condition in Electrical Machines of Locomotives
(SPC, Научно-издательская корпорация, ОАЕ, 2018) Kapitsa, Michail І.; Laguta, Vasiliy V.; Kozik, Yuriy
ENG: The purpose of this study is to determine the signs displaying the insulation ageing process and allow predicting the change in its tech-nical condition under operation of traction motors in locomotives. In order to choose the indicators of the insulation condition, the methods of linear electrical circuits were used to analyze the equivalent scheme of frame insulation. In the equivalent scheme, the dielectric micro- and macro-heterogeneities were taken into account. The most informative parameters of the frame insulation ageing process are those related to absorption and resorption processes over time. The return voltage has been selected as the main characteristic to determine the indicators of insulation condition. The analytical dependences for determining the frame insulation condition indicators have been obtained different from those currently used in the diagnosis of electrical machines. The choice of indicators will allow predicting changes in the technical condition of frame insulation in operation. The studies will allow us to change the regular preventive maintenance technology to the maintenance based on the facility condition.
Study of Rail Vehicles Movement Characteristics Improvement in Curves Using Fuzzy Logic Mechatronic Systems
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kapitsa, Michail І.; Mikhailov, Evgen; Kliuiev, Sergii; Semenov, Stanislav; Kovtanets, Maksim
ENG: The article deals with the effectiveness of reducing the level of force interaction of the rail vehicle wheels with rails in curved sections of the track through the use of mechatronic position control systems for wheel pairs in the rail gauge in the horizontal plane. The approaches to the creation of such a mechatronic system operating on the principles of fuzzy logic are described. To determine the angles of attack of wheels on the rails, it was proposed to use the acoustic emission indicators of the contact of the wheel with the rail. To determine the direction of curvature of the rail track, it is advisable to use data from navigation systems. The study of the dynamics of the rail vehicle during the passage of a curved section of the track in real time was carried out using the Matlab/Simulink software package. The proposed mechatronic control system for the position of the wheel sets in the horizontal plane allows to ensure their optimal installation under various driving conditions in the rail gauge. This makes it possible to minimize the angles of attack of the wheels and reduce the forces of the horizontal interaction of the wheels with the rails.