Transport systems and transportation technologies最新文献

{"title":"STUDYING THE IMPACT OF THE VOLUME OF WORK AT THE RAILCAR TRANSFER POINT ON THE NEED FOR TRACK STORAGE CAPACITY FOR BOGIES","authors":"В. В. Малашкін, М. І. Березовий, М . Є . Перепічко, Каф . « Транспортні","doi":"10.15802/tstt2024/307443","DOIUrl":"https://doi.org/10.15802/tstt2024/307443","url":null,"abstract":"Purpose. In the context of military aggression by moscow, export cargo flows, which were largely transported by sea from Ukraine's Black Sea ports, were directed towards western land crossings. At the same time, exporters were trying not only to find new logistics routes but also to increase exports to European countries. This resulted in longer queues at land borders, both road and rail, and the turnover of railcars and their individual components became uncontrollable and unpredictable. The reason for the downtime of cargo in railroad cars at the borders was the limited processing capacity of railcar interchange points and the transshipment capacity of cargo terminals at border stations. One of the elements of the cargo border crossing system, the increase of which will increase the volume of export cargo flow, is the points of change of wagons from 1435 mm gauge to 1520 mm gauge. Therefore, the aim of this study is to determine the required track capacity for storing 1520 mm and 1435 mm gauge bogies under conditions of daily uneven transportation and the stochastic nature of the turnover of cars on the territory of European railways. Methodology. Simulation modeling, mathematical statistics, and inventory management methods were used to study the impact of the workload of a railcar transfer point on track capacity. Results. As a result of the research, the numerical characteristics of a random variable of the number of cars transferred to the transfer point during the day, as well as the value of car turnover in Europe, were obtained. A methodology for determining the required track capacity for storing bogies based on simulation modeling of the operation of the railcar interchange points was developed. The dependence of the guaranteed stock of bogies of 1435 mm gauge at the station on the daily number of cars serviced at the railroad car transfer point was obtained. Practical significance. The obtained dependences of the required capacity of the tracks for storing bogies on the daily number of cars arriving at the transfer point will allow us to check and, if necessary, bring the existing track development of border stations into line with the calculated volumes of work.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"18 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASSESSMENT OF RISKS AND PROVIDING RECOMMENDATIONS TO MINIMIZE THEIR OCCURRENCE DURING TRANSPORTATION OF CARGO BY RAIL TRANSPORT.","authors":"YU. Zelenko, M. Kalymbet","doi":"10.15802/tstt2024/307372","DOIUrl":"https://doi.org/10.15802/tstt2024/307372","url":null,"abstract":"Purpose: To assess the risks of emergency situations and provide recommendations for their minimization during the transportation of goods by rail transport. Method. On the basis of the methods of comparative typology, expert evaluations and system analysis for the route that runs through the industrial districts of Kryvyi Rih, using the methods of analysis of the causes and consequences of a key event, the combined diagram of the Ishikawa tree of a key event, risk maps of a key event, the analysis of hidden and direct priorities was determined indicator of the risk of the complex effect of negative factors of emergency situations during the transportation of heavy metals. The results. the authors identified the most likely causes of the emergency situation: 1) A rocket projectile that damaged the track, as a result of which the spontaneous exit of wagons occurred; 2) Exceeding the speed of a tank train; 3) Icy, which led to an increase in the braking distance and an accident; 4) Neglect of obstacles to movement before the movement of tanks, which in turn can lead to a stoppage of the technological process, cargo spillage and financial losses. A probabilistic risk assessment was carried out on the basis of an expert assessment of the risk operator and measures to reduce the occurrence of emergency situations were proposed with annual costs for them, thousand UAH. After that, a map of probabilistic risk assessment and a map of probabilistic assessment of risk management effects were created, which provide an opportunity for effective management and management of the probable cause of an emergency situation and the selection of financial investments for measures to reduce the occurrence of emergency situations. After that, it was proposed to use the combined wagon model 17-975(01) with all the necessary equipment as a means for quick localization and liquidation of the consequences of spills of emissions of hazardous substances during their transportation by railway transport in the event of an accident. The economic feasibility of using the proposed tool was also substantiated. The scientific novelty consists in the created model for the analysis of the risk assessment of an emergency situation, as well as the identification of possible causes and factors of the occurrence of emergency situations during the transportation of dangerous goods by railway transport, as well as the development of recommendations for their reduction. The practical significance is the implementation of the developed recommendations, based on the created model, for the formation of a special wagon, for operational needs, with the selection of the necessary equipment for the rapid implementation of the 1st stage of localization and liquidation measures.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"183 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ORGANIZATION OF DELIVERY OF THE COMPANY'S PRODUCTS BY OWN VEHICLES","authors":"O. Nazarov, N. Mukhina, A. Dorosh, L. Yelnikova","doi":"10.15802/tstt2024/307379","DOIUrl":"https://doi.org/10.15802/tstt2024/307379","url":null,"abstract":"Purpose. The purpose of the work is the formation and analysis of options for the organization of the delivery of the machine-building enterprise's products by its own vehicles. Methodology. The main stages of choosing a rational technology for the organization of product transportation by own transport based on the developed schedules have been formed. The research was performed on the basis of the analysis of graphs of the dependence of motor vehicle operation indicators on the technology of organizing the transportation of the company's products. Findings. The article develops and analyzes work schedules for the delivery of the company's products by tractor-trailer trucks with semi-trailers. According to the schedules, the duration of delivery of one product in a ready-to-install condition to the consignee, the maximum possible annual volumes of transportation, the maximum and actual average annual operating costs for the delivery of the company's products by its own vehicles are determined. Practical value. The results of the research can be used to make a decision on the expediency of refusing the services of logistics companies to organize the delivery of the company's products to customers.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"101 400","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141682873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPROVING THE INTERACTION OF THE TYPES OF TRUCK TRANSPORTATION AT THE \"NIBULON\" TERMINAL IN KREMENCHUTS WHEN TRANSPORTING GRAIN LOADS","authors":"M. Moroz, V. Zahorianskyi, T. Haikova, I. Soloshych, O. Zahorianskyi","doi":"10.15802/tstt2024/307333","DOIUrl":"https://doi.org/10.15802/tstt2024/307333","url":null,"abstract":"Purpose. Russia's full-scale military aggression against Ukraine significantly disrupted logistics chains, including those that ensured the export of grain. The classic transportation system at “Niboulon” terminals is focused on transshipment of grain from road to river transport with subsequent transportation to foreign countries by “river-sea” vessels. To ensure the full operation of grain terminals after disruption of water transport in the water area of the Dnipro River, it is advisable to conduct a study on the shipment of grain products to alternative modes of transport (road, rail). Accordingly, the purpose of the research is to improve the interaction of types of freight transport at the Kremenchug terminal “Nibullon” in today's conditions when the work of water transport is blocked. The classic operation scheme of the \"Nibulon\" grain terminal was analyzed. Scientific methods and a method of improving the interaction of different types of transport in the terminal during grain transshipment are substantiated, the determination of the optimal mass of products transferred from the terminal to the main transport is proposed. Methods. An analysis of literary sources was carried out, which made it possible to establish the peculiarities of grain transportation. Methods of set theory, theory of algorithms, theory of transport processes and systems, theory of systems are used. It was established that the optimal mass of products transferred from the terminal to the main transport depends on the average daily number of cars, the gross weight of the car, the traction characteristics of the shunting locomotive and the distance between the terminal and the sorting station of the main transport. Scientific novelty. The scientific novelty obtained as a result of the research to which the article is devoted is the method of determining the average daily number of vehicles (cars, wagons, ships) arriving at the Kremenchug terminal \"Nibulon\", which depends on the average annual cargo turnover for each mode of transport, the weight of the cargo in the vehicle and the number of working days per year of each type. Practical significance. The mathematical expectation of the optimal mass of grain products transferred from the terminal to the main railway transport is established. In further research, the obtained results will be used as initial data for modeling the operation of grain terminals located along the Dnipro riverbed, and in the future - in the direction of the Black Sea ports of Ukraine.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"139 1‐2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH ON LOGISTIC COSTS IN TRANSPORTATION OF AGRICULTURAL CARGO BY ROAD AND RAIL TRANSPORT MODES","authors":"Y. Hermaniuk, I. Palenyk","doi":"10.15802/tstt2024/307370","DOIUrl":"https://doi.org/10.15802/tstt2024/307370","url":null,"abstract":"Goal. Starting with the full-scale invasion on February 24, 2022, the aggressor country began to make it difficult to access major ports in southern Ukraine, limiting the importation, transportation, and export of grain. This forced shippers to look for alternative routes for transporting grain to foreign seaports. A large share of the transportation of grain cargo fell on railway transport and on western terminals, which caused long queues at crossing points. Restrictions also affected the capacity of internal railway lines. To restore the transportation of agricultural goods and increase the efficiency of the organization of grain transportation, it is necessary to conduct a study of the logistics costs of road and rail transportation, considering such factors as the type of shipment, the volume of cargo, time costs, the cost of transportation, and the capacity of border crossings and terminals. Method. The research was carried out based on statistical analysis, methods of operational work for calculating the norms of mass and length of route trains, a comprehensive analysis of logistics costs when transporting various types of shipments by rail and road modes of transport, considering the technical equipment of terminals and the capacity of crossing points, the train formation plan (TFP). The results. Based on calculations, the conditional lengths of route trains are determined, with their further bringing them to the current PFP on the railways of Ukraine; the cost of delivery of grain cargoes when transported by rail was calculated for various types of shipments, and a comparison was made with road transport; terms of cargo delivery, main advantages and disadvantages of each type of transportation are determined; analysed and selected the best method of transportation of agricultural cargo, taking into account the weight of the cargo being transported, the time spent on transportation along the tracking routes; a comparison of financial costs per ton of cargo was made; proposed options for increasing the throughput of border railway stations. The work also identifies the busiest terminals that carry out a significant share of cargo processing at border railway stations with a relatively large capacity and technical support for the transhipment of grain depending on the types of shipments, namely: railway stations and their transitions - Chop - Chierna-nad-Tysoy, Mostyska II-Medyka and Izov - Hrebushiv. Practical significance. The obtained results can be applied in decision-making systems for shippers, which will help in choosing the optimal route and type of rolling stock for cargo transportation. The rational choice of types of shipments and transfer stations makes it possible to use technical means for cargo transhipment as effectively as possible, to reduce the waiting time of wagons at border stations while waiting for technological operations and to reduce the time for these operations, to reduce the total costs of transporting agricult","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"83 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141683981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IDENTIFICATION OF OPERATING MODES OF THE DEFROSTING GARAGE OF THE LOAD STATION OF THE INDUSTRIAL ENTERPRISE IN DYNAMIC CONDITIONS","authors":"В . Г . Дженчако, А . В . Дженчако, М . Л . Янгічер, Каф . « Транспортні","doi":"10.15802/tstt2024/307376","DOIUrl":"https://doi.org/10.15802/tstt2024/307376","url":null,"abstract":"Purpose. At the current stage of operation of the defrosting garages of the freight station of the industrial enterprise, the defrosting of wagons with bulk raw materials takes place in conditions of a changing environment, which leads to low efficiency of the interaction of railway transport and the unloading complex. To solve this problem, it is necessary to identify the modes of operation of the defrosting garages of the cargo station of the industrial enterprise in dynamic conditions, to analyze the consumption of natural gas for defrosting. Research methods. The following methods were used during the research: synthesis and analysis for the study of the issue and scientific publications regarding the state and ways of identifying the modes of operation of the defrosting garages of the cargo station of the industrial enterprise; experiment planning - to obtain a multidimensional, diverse array of statistical data; theory of probability and mathematical statistics - for data processing, obtaining correlation dependences of indicators of identification of modes of operation of defrosting garages of a cargo station of an industrial enterprise in dynamic conditions. The results. The work is devoted to the solution of the scientific and technical problem of identifying the operating modes of the defrosting garages of the cargo station of the industrial enterprise in the conditions of a changing environment. The work evaluates the modes of operation of the defrosting garages of the cargo station of the industrial enterprise when defrosting bulk raw materials.The influence of external factors on the consumption of natural gas during defrosting of bulk raw materials in wagons was evaluated. On the basis of research conducted in the process of defrosting bulk raw materials in wagons, two temperature modes of operation of garages were identified, which determine different gas consumption. Basic, regulatory mode with a constant defrosting temperature set by technological standards and maximum gas consumption. Periodic, with reduced gas consumption, is characterized by a decrease in temperature after 6-7 hours and subsequent defrosting using accumulated heat, which ensures a decrease in gas consumption. The possibility and expediency of wide practical use of accumulated heat in the process of defrosting bulk raw materials in wagons has been established. The temperature and time parameters of the process of defrosting bulk raw materials in wagons using accumulated heat are proposed, which ensures a significant reduction in energy consumption. Increasing the efficiency of the defrosting garages of the freight station of the industrial enterprise was achieved on the basis of the development of a method and model of natural gas consumption when defrosting bulk raw materials in wagons using accumulated heat. The scientific novelty consists in the identification of the operating modes of the defrosting garages of the cargo station of the industrial enterprise ","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"82 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141683991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AUTOMATED COMPLEX FOR MEASURING THE WINDING TEMPERATURE OF TRACTION ELECTRIC MACHINES DURING THEIR HEATING TEST","authors":"A. Afanasov, O. Shapovalov","doi":"10.15802/tstt2024/307369","DOIUrl":"https://doi.org/10.15802/tstt2024/307369","url":null,"abstract":"Purpose. The development and implementation of automated complexes for testing traction electric machines of rolling stock at the current stage is an extremely important task. Automated test complexes provide an opportunity to significantly increase the quality and efficiency of tests on traction electric machines. Thanks to the use of advanced technologies, these complexes ensure accurate data collection and analysis during tests. One of the main advantages of automated complexes is the reduction of cost and labor costs for conducting tests. Instead of manual intervention by operators, automation systems can perform many tasks automatically, saving time and reducing labor costs. Methodology. The methodological basis of the research is analytical research methods based on the compilation of a calculation system of differential equations based on the accepted test scheme, as well as the development of an algorithm for conducting tests on a designed stand. Findings. The proposed test complex allows to conduct tests of collector traction electric machines, to determine the excess temperature of the windings of electric machines without the need to stop them. The functional scheme of the measuring complex allows you to automatically record the parameters of the tested electric machines, and if necessary, it is possible to output the test results to a computer with the subsequent formation of the test protocol in electronic form. The accuracy of the determination of the measured parameters is ensured by the accuracy of the measuring devices and the algorithm of the measuring complex. Originality. The proposed automated measuring complex is a big step in the direction of improving the efficiency and reliability of heating tests of traction electric machines. One of its key advantages is the ability to perform tests without stopping the machine, which significantly reduces the time and costs of conducting tests. Automatic registration of measured parameters allows to record several controlled indicators at the same time, which provides a more complete and objective assessment of the state of the electric machine during testing. This complex not only facilitates the testing process and reduces the cost of time and resources, but also increases the reliability of the obtained results, which is important for manufacturers and operators of transport systems. In general, the automated measuring complex opens up new opportunities for increasing the efficiency and reliability of testing electric traction machines, contributing to the further development of transport technologies. Practical value. The implementation of the obtained results by enterprises for the repair of traction electric machines of rolling stock will allow to reduce the material costs of carrying out repairs while simultaneously improving the quality of the conducted tests.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"75 s321","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141682222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TRACK CIRCUITS INTERFERENCE RESISTANCE INCREASE UNDER THE TRACTION CURRENT INFLUENCE","authors":"А . Ю . Журавльов, О . І . Саблін, В . І . Щека, К . І . Ящук, Каф . « Автоматика","doi":"10.15802/tstt2024/307339","DOIUrl":"https://doi.org/10.15802/tstt2024/307339","url":null,"abstract":"Purpose. The aim of the work is to increase the electromagnetic compatibility of track circuits with the traction power supply system of railways under the influence of reverse traction current disturbances. Conducting research and analysis of the causes of malfunctions of rail circuits on electrified sections of the railway, existing means and methods of increasing the interference resistance of track circuits and ensuring the electromagnetic compatibility of signaling, centralization and blocking devices with the traction power supply system, and the development of effective technical solutions for normalizing the operation and rail circuits in the conditions influence of traction current interference. Conducting a study of the electromagnetic characteristics of the DT-1-150 track choke-transformer in normal mode and under the influence of external factors on the magnetic system. Methods. During the research, methods of comparative analysis, theories of electric and magnetic circuits, methods of spectral analysis of signals, as well as mathematical, schematic and physical modeling were used. Findings. Situations in which the traction current significantly affects the operation of the rail wheel equipment have been analyzed in the work. The effect of the traction current constant component on the normal operation mode of the track circuits is considered. The coefficients value of the choke-transformer DT-1-150 with traction current asymmetry was determined. A comparative analysis of resistance to reverse traction current disturbances of track receivers of station rail wheels used at the docking station was conducted. The principle-structural scheme of the protective unit for blocking the leakage of direct traction current interference on the section of alternating current traction was developed. The scientific novelty. The scientific novelty of the work consists in identifying and justifying the causes of some specific failures of track circuit; in confirming the integral effect of choke-transformer steel core saturation, created by the constant component of the traction current in the railway power supply system. Practical significance. Based on the conducted research, the interference resistance of the 25 Hz track circuit with the DSSH-16 track relay and DT-06-500S was confirmed. A protective valve block was developed, which prevents the flow of the first periods of the largest amplitude transient current in the track circuit its protects and ensures, thereby, normal operation of track circuit.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":" 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141680820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RELIABILITY ANALYSIS OF SWITCH’S CONTROL SCHEMES","authors":"V. Shcheka, K. Yashchuk, A. Zhuravlov, O. Sablin","doi":"10.15802/tstt2024/307337","DOIUrl":"https://doi.org/10.15802/tstt2024/307337","url":null,"abstract":"Purpose. The purpose of this article is to conduct an analysis of the reliability of the control schemes of the electric arrow drive with the aim of optimizing and modernizing them to increase the reliability indicators. To show an approach to optimizing the control circuits of an electric turnout that is advantageous from an operational point of view, the implementation of fewer control circuits will minimize the number of failures. To demonstrate a principled circuit solution for optimizing the control circuit of an electric turner with the use of separate redundancy with always-on redundancy and integer multiplicity. Methods. During the research, methods of comparative analysis, synthesis, probability theory, and reliability theory were used. Findings. The paper analyzes the types of re-reservation as a way to increase the reliability of the arrow control scheme. A comparative study of the reliability of various options for reserving the turnout control scheme was carried out in comparison with the classic situation on the railways of Ukraine - the absence of a reserve. It has been proven that the use of separate redundancy with always-on reserve and integer multiplicity provides the maximum increase in reliability, but the significant amount of necessary equipment significantly reduces the economic attractiveness of this method. On the other hand, the use of separate redundancy with substitution and fractional multiplicity (sliding redundancy) gives a positive result only if one redundancy unit serves no more than 15 turnout electric drives, otherwise the overall reliability of the subsystem may decrease. The optimization of the arrow control subsystem at the station is proposed, which requires the use of only six arrow control schemes, one of which is a sliding reserve. The influence of different types of redundancy on the reliability indicators of the arrow control scheme is considered. The most effective option for optimizing the arrow control subsystem has been determined. Scientific novelty. The scientific novelty of the work consists in the well-founded sufficiency of using only six arrow control schemes in combination with the use of sliding redundancy of the arrow control scheme for the control of arrows when disbanding warehouses on the sorting slide. The proposed method makes it possible to increase the reliability of the arrow control subsystem while maintaining the operational parameters of the station. Practical significance. The practical significance of the results lies in the fact that when using the proposed optimization, the resource use of hill automation devices is improved, the maintenance process is simplified, and the total cost of equipment and maintenance costs are reduced.","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"19 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INCREASING THE RELIABILITY OF THE SYSTEM OF AUTOMATIC VOLTAGE REGULATION OF LOW-VOLTAGE CIRCUITS OF ELECTRICAL DIRECT CURRENT MOVEMENT COMPONENTS","authors":"D. Belukhin, V. Vasylyev","doi":"10.15802/tstt2024/307378","DOIUrl":"https://doi.org/10.15802/tstt2024/307378","url":null,"abstract":"Purpose. The purpose of this work is the analysis of possible directions for improving the performance indicators of electric rolling stock of direct current railways. The work is devoted to the improvement of systems of automatic voltage regulation of low-voltage circuits where the power source is a direct current generator. The number of electric locomotives and electric trains of railways and their units, which have exhausted their service life, but will be in service for a long time, preserves the relevance of research into possible directions of modernization and the specifics of system operation. Methodology. The work uses the analysis and generalization of previously performed research. The methodological basis of the research is the mathematical apparatus of the theory of automatic control and the theory of reliability. The object of research is the process of functioning of low-voltage control circuits of electric rolling stock of direct current railways with direct current generators as an energy source. The subject of the study is a voltage regulator for own needs based on a modern element base. Findings. A variant of the system of automatic voltage regulation of low-voltage circuits with generator power sources for electric rolling stock of direct current is offered. The basis of the system is the voltage regulation node, which in the existing structure is made on the basis of a carbon vibration regulator on a strip. As an alternative, a system based on operational amplifiers and the use of proportional or proportional-integral laws of the regulator in the structure is proposed. Modeling of dynamic processes indicates the structural stability of the system and qualitative transition processes. A comparison of the no-failure indicators of the nodes indicates a possible increase in terms between services and cost savings. The comparison is made for systems that are in operation for a long time and those that are offered. Originality. It is proposed to implement the node of the system of automatic voltage regulation on a modern elemental basis, which allows to improve the reliability of the system and implement a small, economical, modernization of rolling stock of railways with an exhausted service life. Practical value. The obtained results can be used by enterprises that carry out major repairs of electric trains and direct current electric locomotives with extended service life. The implementation of the proposed units makes it possible to replace existing contact-based relay systems with fast contact wear, frequent maintenance and debugging. As a result, new units can be transferred to service during current repairs due to the introduction of non-contact systems and increase the probability of trouble-free operation and use the personnel who are always present in locomotive depots. This reduces the cost of maintenance due to the introduction of a modern element base and exclusion from the technological process of maintenance of exis","PeriodicalId":319166,"journal":{"name":"Transport systems and transportation technologies","volume":"82 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}