scholarly journals DEVELOPMENT OF THE METHOD OF CLUSTERIZATION OF TRAIN SITUATIONS

2021 ◽  
Vol 1 (37) ◽  
pp. 187-195
Author(s):  
O. Gorobchenko
Keyword(s):  
Finite Number ◽  
Control Systems ◽  
Traffic Safety ◽  
Traffic Control ◽  
Euclidean Distance ◽  
Complex Shape ◽  
Rolling Stock ◽  
Number Of Classes ◽  
Decisive Rule

The introduction of intelligent locomotive control systems requires better approaches to assessing and monitoring the current train situation than those used in modern traction rolling stock. Automatic detection of complex abnormal situations is currently not provided. For example, determining the inefficiency of the brakes, speeding, the presence of obstacles or people on the track, the deterioration of the traction properties of rolling stock, etc. relies solely on the driver of the locomotive. Given the important impact of these factors on traffic safety, it is proposed to include in the functions of automated and intelligent traffic control systems recognition of abnormal situations and notification of its occurrence. When driving a train, all objects of classification (train situations) are divided into a finite number of classes. A finite number of precedent objects are known and studied for each class. The task of pattern recognition is to assign a new recognizable situation to a class. The classifier or decisive rule is the rule of assigning the image of a train situation to one of the classes on the basis of its vector of features. An order of classification of train situations has been developed, which allows to allocate clusters of any complex shape, provided that different parts of such clusters are connected by chains of close to each other elements. The measure of difference is the square of the Euclidean distance.

Functional structure of the subway train traffic control system complex

2021 ◽  
Vol 7 (3) ◽  
pp. 343-361
Author(s):  
E. O. Averchenkov ◽  
◽  
L. A. Baranov ◽  
M. A. Shevchenko ◽  
◽  
...  
Keyword(s):  
Energy Consumption ◽  
Remote Control ◽  
Control Systems ◽  
Traffic Safety ◽  
Traffic Control ◽  
Minimum Energy ◽  
Functional Structure ◽  
Normal Operation ◽  
Rolling Stock ◽  
Emergency Situations

The main architectural aspects of metro train traffic control systems are presented. The structure of train traffic control processes is presented with the example of the State Unitary Enterprise “Moscow Metro” and the main tasks that need to be solved to achieve high levels of automation of train traffic control in subways are described. A functional structure of a complex of metro train traffic control systems is presented, covering the levels of organization and planning of train traffic, operational traffic control and direct executive systems. The relationship between objects of automation and remote control of train movement, devices of the operational level and systems of organization and planning of movement are shown. The necessity of re-equipping the metro with means of ensuring transport safety and linking them with traffic control systems such as: means of informing passengers, providing the possibility of promptly informing passengers both during normal operation of the transport system and in case of emergency situations, means of communication “passenger – control center (situation center)” is shown. The latter ensures interaction between passengers and operational personnel of the subway, and if necessary, video surveillance equipment that provides enhanced remote control of the current situation in the interior of rolling stock cars and on platforms. The use of complex systems for controlling the movement of trains in subways increases the efficiency of their use by increasing the throughput and carrying capacity, accurate fulfillment of the traffic schedule and the possibility of its rapid recovery in case of failures. At the same time, traffic safety increases by reducing the likelihood of dangerous train convergence , and also the energy consumption for train traction is reduced due to the choice of energy-optimal train control modes and the optimal distribution of travel time along the line by the criterion of minimum energy consumption for the duration of travel along the tracks

scholarly journals Improving the Methodology of Placing Peripheral Devices for Monitoring the Technical Condition of Rolling Stock

2021 ◽  
pp. 25-36
Author(s):  
V. V. Burchenkov
Keyword(s):  
Traffic Safety ◽  
Block Diagram ◽  
Research Work ◽  
Technical Condition ◽  
Rolling Stock ◽  
Functional Block Diagram ◽  
Process Step ◽  
Technical Control ◽  
Control Devices

Purpose. Based on the research work of units and parts of rolling stock undercarriage in transient modes of emergency situations it is proposed to optimize the sequential placing of peripheral contactless devices for technical control of locomotives and cars on railway lines. Methodology. Investigation of transient processes of temperature increase of faulty axle bearings of locomotives and cars during remote technical diagnosing allows one to organize theory and hardware construction of the peripheral systems for testing the rolling stock on the move. Automatic control of the technical state of the rolling stock on the move – the last and in some cases the only possible process step, which allows revealing unacceptable defects in rolling units and thereby prevent emergencies in railway transport. Findings. Based on the research it was proposed a solution to the optimization problem of placing peripheral control devices of rolling stock when moving according to the criteria of the linear and exponential nature of heating defective axle boxes of wheelsets and other units of undercarriage. The risks of train stop on the railway line because of the erroneous classification of normally heated axle boxes as overheated, as well as the consequences of classification of overheated axle box as normally heated axle boxes were evaluated. Originality. Optimization model of placing peripheral control devices based on probabilistic criteria for evaluating the degree of permissible risk that, at a minimum, should not be exceeded during the transition to control technical means. A functional block diagram of test hardware diagnostics for the wheelsets when determining the gradations of digital indicators of defects was proposed. Practical value. The value of the results obtained lies in the improvement of a method of placing technical control peripheral devices and diagnosing rolling stock when determining the distance between the control stations in the same direction and organizing tracking modes for railcars with developing defects. From a technical point, reduced error probability is directly related to traffic safety and diagnostic algorithms.

scholarly journals Study of the possibility of using transmission in the lte system on a selected railway line for the purpose of running railway traffic

2021 ◽  
Vol 57 (1) ◽  
pp. 91-101
Author(s):  
Marcin Chrzan
Keyword(s):  
Control Systems ◽  
Traffic Control ◽  
Research Work ◽  
Rolling Stock ◽  
The European Union ◽  
Radio Communication ◽  
Railway Line ◽  
Railway Traffic ◽  
Railway Infrastructure ◽  
Rail Traffic

The railway and the Rail Traffic Control Systems installed on it in Poland have recently experienced rapid technologi-cal development. This is undoubtedly due to the funds that Poland receives from the European Union for the moderni-zation of railway infrastructure. The development of modern railway infrastructure means not only stations, modern rolling stock, but also safe and reliable train control systems based on the latest telecommunications and information technologies. For a longer time, radio communication based on the GSM-R (GSM for Railways) standard is being introduced on PKP. For this purpose, dedicated infrastructure is being built in order to use this technology for railway traffic. This is associated with huge investment costs. Since the beginning of its existence, research has been conducted worldwide on the use of LTE (Long Term Evolution) technology for conducting railway traffic. For economic and technological reasons, it is necessary to study other possibilities of using modern telecommunications infrastructure not yet dedicated to railway tasks in these open networks. The article will present research on the use of open radio communication network based on LTE standard for rail traffic and passenger comfort. It will discuss the research method and selected results of measurements made on railway line no. 4. The choice of this railway line was dictated by two factors. The first one resulted from the maximum train speed, the second one is the variety of rolling stock used on this line (compartmental and non-compartmental wagons). The part of research concerning collection of measurement material was performed within the framework of completed research work PBS3/A6/29/2015. As a result of conducted in-depth literature analysis as well as performed measurements and calculations, it allowed to develop a model and software for simulating system operation in real conditions. This system allows to send railway telegrams on appropriate safety level defined in standardization documents. The research proved the possibility of using an open system in the LTE standard for the transmission of signals for railway traffic control and passengers while maintaining an appropriate level of safety. The only limitations which were indicated by the tests are improper radio interface coverage of railway lines. Appropriate planning of radio coverage of railway areas by radio communi-cation operators (so far ignored) with proper cooperation of infrastructure manager can lead to launching efficient communication system without necessity to build specialized infrastructure for railway.

scholarly journals Fast algorithm for radio propagation modeling in realistic 3-D urban environment

2015 ◽  
Vol 13 ◽  
pp. 169-173 ◽  
Author(s):  
A. Rauch ◽  
J. Lianghai ◽  
A. Klein ◽  
H. D. Schotten
Keyword(s):  
Control Systems ◽  
Traffic Safety ◽  
Traffic Control ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
Mobile Video ◽  
Mobile Gaming ◽  
Transmission Rates ◽  
Propagation Modeling ◽  
Reliable Communications

Abstract. Next generation wireless communication systems will consist of a large number of mobile or static terminals and should be able to fulfill multiple requirements depending on the current situation. Low latency and high packet success transmission rates should be mentioned in this context and can be summarized as ultra-reliable communications (URC). Especially for domains like mobile gaming, mobile video services but also for security relevant scenarios like traffic safety, traffic control systems and emergency management URC will be more and more required to guarantee a working communication between the terminals all the time.

Development of the Train Traffic Regulation Method for “Rail Baltica” Line Based on the Implementation of the European Train Traffic Control Systems

2017 ◽  
Author(s):  
Larisa Valentinovič ◽  
Henrikas Sivilevičius
Keyword(s):  
Control Systems ◽  
Traffic Safety ◽  
Traffic Control ◽  
Positive Impact ◽  
Primary Objective ◽  
Regulation System ◽  
Railway Network ◽  
Traffic Lights ◽  
Railway Traffic ◽  
Traffic Regulation

This article focuses on analyzing the systems and methods used for the interval regulation of train movement on “Rail Baltica” line in “Lithuanian Railways”. The method discussed in the article can be viewed as a combination of several management automation solutions and it is based on the implementation of the European Railway Traffic Management System (ERTMS). As it is known, the ERTMS provides an interoperable European railway network. The primary objective is to improve the quality of train traffic and to make railway transport safer and more comfortable. In order to ensure new traffic prevision for Lithuanian Railways, new interval regulation methods and traction calculations must be used. This developed method is more useful than the previous methods as it allows to shape an efficiently automated and optimized scheduling process as well as to improve line capacity and efficiency. This paper proposes the development of a moving block train control system. The calculations were made using the intervals between trains. The interval and block-section borders are not fixed by traffic signs or traffic-lights. Instead, they move after the train in the front, creating a flexible interval regulation system. The results showed that the implementation of the method had a positive impact on the operators’ performance and allowed to reduce energy consumption and to increase the speeds of train movement. The paper also presents a statistical figure portraying railway accidents and railway operation accident reports before and after the implementation of the ERTMS. The results of the analysis showed that the implementation of the European Train Traffic control systems and the interval regulation of train movement method will provide high throughput and carrying capacity, traffic safety and also increase the productivity of operation procedures.

An application of TCP and UDP protocols in the connection of railway traffic control systems

2019 ◽  
Vol 126 ◽  
pp. 49-59
Author(s):  
Juliusz Karolak ◽  
Andrzej Kochan
Keyword(s):  
Control Systems ◽  
Traffic Control ◽  
Railway Traffic ◽  
Network Connections ◽  
Rail Traffic

The article presents the possible implementation of the interface between computer devices: TCP and UDP protocols of one of the layers of the TCP / IP model, along with their features. Responses to errors were distinguished. Then an example of cooperation between two actual rail traffic control systems and other examples was presented, supplementing them with the proposed classification of connections. Systems are also presented, inside which network connections using TCP and IP protocols are used. The influence of the indicated damages on the substantive work of the connection was also presented.

Coordination of technology of railway operation of the Republic of Tajikistan and organization of railways in international traffic

2018 ◽  
Vol 77 (4) ◽  
pp. 211-217 ◽  
Author(s):  
P. N. Pulatov
Keyword(s):  
Rolling Stock ◽  
Railway Transport ◽  
Transport Services ◽  
Railway Infrastructure ◽  
External Conditions ◽  
The Republic ◽  
Railway Operation ◽  
Required Quality

Current geopolitical and economic conditions for the functioning of railway transport in most post-Soviet states are such that it is extremely difficult to provide required quality of transport services and break-even operations at high expenses for maintaining the railway infrastructure and rolling stock. Dynamics of transportation of the Tajik Railway (TSR) is shown, which displays that most of its sections are classified as low-intensity ones. The paper proposes methodical principles, setting and qualitative analysis of the task of rationalization of operational work and organization of car flows for international transportation, taking into account the specifics of the Tajik Railway. There is a problem of complex maintenance of the efficiency of operational work in modern conditions based on the synthesis of the tasks of self-management (rational internal operational technology of the Tajik Railway) and coordination tasks (technological interaction with railway administrations of other states). Author substantiated the necessity of solving this problem. Proposed classification of technological restrictions and controlled variables in the performance of transport takes into account methods for changing external conditions for the functioning of the railway landfill and methods for increasing internal efficiency of its operation. The search for the solution of the problem involves direct search of variants along its ordered set with clipping of groups of variants that do not correspond to constraints, with the subsequent finding of compromise control over a set of effective alternatives.

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