Browsing by Author "Malovichko, Volodymyr V."

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    Determining the Set of Elements for Automatic Monitoring and Diagnosing the Relay Interlocking System
    (Kaunas University of Technology, Kaunas, Lithuania, 2022) Malovichko, Volodymyr V.; Rybalka, Roman V.; Malovichko, Natalia V.; Honcharov, Kostiantyn V.
    ENG: The majority of train movement control within a station in Ukraine railways is achieved by the relay interlocking system (RI). There is no self-diagnosing in RI systems. Therefore, the time spent on failure recognition, localization and correction (especially those that occurred in the RI tower) is significant. Most RIs have been operating for more than 30 years, yielding a gradual increase in the failure rate and, consequently, delays. Failure effects can be reduced by automating the process of failure localization in RI applying the appropriate automatic monitoring and diagnosing (AMD) system. A subset of input signals of the latter is composed of signals from the sensors that measure the states of RI's elements. A large number of RI elements and limitations on the resources regarding the AMD system installation stipulate the virtual impossibility to equip all RI elements with corresponding sensors. The purpose of this research is to determine a set of elements in the tower-located part of RI to be equipped with corresponding sensors intended to be used in the AMD system, considering the limitations on the resources regarding the AMD system installation. In this research, we propose to apply fuzzy logic to consider assessing the appropriateness of including particular elements in the tower-located part of RI to the elements-under-monitoring (EM) set obtained from a single individual (Mamdani fuzzy inference system) or a group (rank ordering) of experts in the field of the RI operating. Research results yielded recommendations regarding the process of selecting the elements in the tower-located part of RI to be included in the EM set, considering the limitations on the resources regarding the AMD system installation. The AMD system development is out of the scope of the current research. Further studies are needed to provide an economic justification of the AMD system operation based on the EM set.