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 SCIENTIFIC APPROACH TO THE METHODS OF INCREASING THE LIFE CYCLE OF WHEELS OF RAILWAY VEHICLES

2021 ◽  
Vol 1 (38) ◽  
pp. 164-172
Author(s):  
S. Sapronova ◽  
V. Tkachenko ◽  
N. Braikovska ◽  
Y. Zub
Keyword(s):  
Life Cycle ◽  
Traffic Safety ◽  
Technical Condition ◽  
Rolling Stock ◽  
Optimal Parameters ◽  
Maintenance And Repair ◽  
Complete Restoration ◽  
Scientific Approach ◽  
Wheel Profile ◽  
Railway Rolling Stock

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 scientific approach, the wheel profile is restored to optimal parameters, which provides an extended life cycle of wheelsets. As a result of the developed scientific approach the life cycle of wheel pairs will increase by 15… 25% and the expenses of the railway for their repair will considerably decrease.

scholarly journals VARIABILITY MANAGEMENT OF EFFICIENT VEHICLE OPERATION BASED ON FUNCTIONAL RESONANCE ANALYSIS METHOD

2021 ◽  
pp. 80-88
Author(s):  
O.P. SAKNO ◽  
T.M. KOLESNIKOVA
Keyword(s):  
Traffic Safety ◽  
Block Diagram ◽  
Good Condition ◽  
Technical Condition ◽  
Technical System ◽  
Analysis Method ◽  
Resonance Analysis ◽  
Maintenance Work ◽  
Technical Operation ◽  
Definition Of

Raising of problem. The methodology presented in this study is aimed at modeling the variability of the technical condition when operating a car in a complex social and technical system "car − person − environment". This allows you to simulate the change in the operational properties of the car depending on its operation, affecting the change in the technical condition by the Functional Resonance Analysis Method (FRAM). Purpose. The variability of the technical operation of the car needs to be managed, and not reduced or eliminated, since this is an advantage, as well as conditions for the safety and functioning of complex socio-technical systems. To control it, you must first monitor the variability of the vehicle's technical operation. A set of relevant indicators needs to be identified and developed. Their interpretation makes it possible to draw conclusions about the level of technical condition, operational properties of the vehicle and traffic safety and supports the prediction of the occurrence of future events (failure occurrence). Conclusion. Thus, the basic principles of the FRAM for modeling the variability of the technical condition when operating a car in a complex social and technical system "car − person − environment" have been determined. The relationship has been established between the definition of traffic safety, the FRAM model and the performance indicators of the vehicle. The developed model of the FRAM for maintenance of the undercarriage of cars, consisting of a set of functions that describe the actions taken to maintain cars to ensure their good condition. A block diagram of the implementation of functionally oriented technologies for the maintenance and repair of cars has been developed, taking into account the design features and the level of technology for technical influences. This allows you to objectively determine the required scope of maintenance work, depending on the results of diagnostics and the availability of technological equipment.

scholarly journals FEATURES OF RESEARCH OF COMMERCIAL FAULTS OF CARGO TRANSPORTATION WHEN EXECUTING FORENSIC RAILWAY TRANSPORT EXAMINATIONS

2019 ◽  
pp. 600-608
Author(s):  
O. Dzhus
Keyword(s):  
Research Work ◽  
Causal Link ◽  
Technical Condition ◽  
Rolling Stock ◽  
Railway Transport ◽  
Spontaneous Movement ◽  
Loss Of Life ◽  
Parking Lot ◽  
Cargo Transportation ◽  
The Impact

In the article was noted the importance of the study of the conditions for the carriage of goods by rail transport when executing the railway transport examination, and the main points of such studies are given. One of the causes of the onset of a railroad accident (hereinafter referred to as RTA) with damage to the rolling stock, infrastructure elements, loss of life and loss of cargo through damaged packaging, the integrity of the car body may be a mismatch of the cargo weight with established weight standards, unsatisfactory the technical condition of the rolling stock in which the cargo is transported, improper securing of the cargo in the car, disorder of attachment on the route or interference of unauthorized persons to the cargo itself (theft). As a part of the railway-transport expertise, experts investigate cases of derailment of railway rolling stock, spontaneous movement of cars from the parking lot, followed by their collision, and other cases. Upon the occurrence of an RTA, the compliance of the actions of the railway employees involved with the requirements of regulatory documents, the causal link and the immediate technical reason for its occurrence is investigated. Experts carrying out research within the examination regarded various possible discrepancies that could cause the occurrence of RTA. The inconsistency of the mass of the cargo with the established weight standards for transportation by rail is considered by experts, precisely as a possible discrepancy that could significantly affect the occurrence of the accident. This direction of research requires detailed consideration from the position of forensic expertise. The article discusses individual issues of this type of inconsistency. These points are considered in more detail in a research work devoted to a study of the main transport characteristics of the goods transported and their packages, with an assessment of the possibility of their influence on the causal relationship with the onset of the RTA as part of the railway transport expertise. Each type of faults (inconsistencies) identified during the carriage of goods by rail is investigated as part of the implementation of forensic railway transport examinations and requires the formation of detailed expert approaches. The presented work confirms the relevance of developing a methodology for assessing the impact of cargo transportation features on the onset of railway accidents. Key words: commercial malfunctions, forensic railway-transport expertise, cargo, features of transportation, fasteners, weight standards.

scholarly journals RESEARCH INTO SAFE TRAFFIC OF LITHUANIAN RAILWAY LINES

Transport ◽  
2005 ◽  
Vol 20 (4) ◽  
pp. 154-159
Author(s):  
Laura Černiauskaite ◽  
Igoris Podagelis ◽  
Kazys Sakalauskas
Keyword(s):  
Traffic Safety ◽  
Traffic Accidents ◽  
Human Factor ◽  
Technical Condition ◽  
Rolling Stock ◽  
The European Union ◽  
Stock Company ◽  
Traffic Incidents ◽  
First Results

The European Union directions pay a specific focus on traffic safety. Safety of railway transport traffic is among priority fields which has a direct effect on the quality of life of the population. It is most convenient to consider the number of breaks and accidents per year as the indicator of traffic safety. Reasons of traffic accidents can be very different. Most accidents occur due to poor technical condition of rolling‐stock and infrastructure, the human factor and the deficient organization of traffic. Stock Company “Lithuanian railways” can not assure safe traffic yet. The number of traffic incidents decreased in a few preserves only. Considering that, it is necessary to prepare a strategy for traffic safety and the program for its implementation. In 2002 specialists started preparing a study for safe traffic. The study is important for the preparation and implementation of the mentioned program. First results obtained from the research have already approved the importance of the influence of infrastructure, rolling‐stock and a human factor on traffic safety. The research carried out indicates positive changes in the situation of traffic safety of Lithuanian railways.

scholarly journals CERTIFICATION DEPOT AS ONE OF WAYS TO ENHANCE PERFORMANCE MULTIPLE UNITS

2015 ◽  
Vol 2 (158) ◽  
Author(s):  
Anatoliy Falendysh ◽  
Vіktor Baikov ◽  
Olga Kletska
Keyword(s):  
Traffic Safety ◽  
Technical Condition ◽  
Rolling Stock ◽  
Multiple Units

The technical condition of the locomotive fleet is directly related to traffic safety. However,according to the Department's annual suburban passenger Ukrzaliznytsia analysis Traffic Safety negativetrend of the deteriorating condition of the motor-car rolling stock (MVPS) is stored.

scholarly journals Improvement of control devices for road sections of railway automation and telemechanics

2021 ◽  
Vol 264 ◽  
pp. 05031
Author(s):  
Aziz Saitov ◽  
Janibek Kurbanov ◽  
Zohid Toshboyev ◽  
Sunnatillo Boltayev
Keyword(s):  
Control Unit ◽  
Technical Condition ◽  
Rolling Stock ◽  
Scientific Article ◽  
Self Monitoring ◽  
Uninterruptible Power Supplies ◽  
Functional Control ◽  
Control Devices ◽  
Uninterruptible Power ◽  
And Control

In this scientific article, control sensors and control devices have been improved based on the method of counting arrows of the rolling stock of railway transport. The microprocessor-controlled control unit and control system have been simplified to manage traffic between two stations, and a self-monitoring, reliable and risky scheme has been developed. Wiring diagrams of existing transport relays have been updated for uninterruptible power supplies, microprocessor devices, and sensors. An automated schematic diagram with a microprocessor for signaling a collision of a railway with wagons has been created, and the order in which the speed of train movement approaches the crossing has been maintained. The complex functional control of rolling stock was improved based on the method of counting bullets, electronic archiving of the movement of orders of the train attendant and dispatcher, as well as the operation of devices for monitoring the technical condition of the station.

scholarly journals Experimental study of the rolling resistance of car wheels on a roller stand

2021 ◽  
Vol 12 (2) ◽  
pp. 68-75
Author(s):  
Igor Мarmut ◽  
◽  
Vitalii Kashkanov ◽  
Volodymyr Zuiev ◽  
◽  
...  
Keyword(s):  
Traffic Safety ◽  
Experimental Studies ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Technical Condition ◽  
Radial Force ◽  
Test Method ◽  
Rolling Stock ◽  
Passenger Cars ◽  
Wheel Rolling

The article considers the results of experimental studies of the rolling resistance of car wheels on a roller stand. Also, the dependence of the coefficient of total resistances during wheel rolling on the stand rollers on the speed was established. Monitoring and diagnosing the technical condition of the rolling stock of vehicles from the point of view of traffic safety is one of the most important problems. This control is especially important for systems whose technical condition affects traffic safety, first of all, brake systems, as well as the power unit in the traction test mode. Foreign and domestic experience testifies to the effectiveness of instrumental control. Its advantages lie in the reliability of the values of the checked parameters. The diagnostic equipment includes roller stands, on which you can check the braking and traction properties of cars. As shown by many studies, in particular, carried out at the Department of Technical Operation and Service of Automobiles, KhNADU (HADI), inertial stands provide more reliable information about the technical condition of the car. The inertial test method allows you to reproduce real speed and thermal modes of operation. To improve the accuracy of diagnosing a car on a roller stand, it is necessary to have an idea of the nature of the interaction of the car wheels with the stand rollers. Studies of wheel rolling on the stand rollers have been carried out by many authors since the 70s of the last century. However, all of these studies were conducted on old bias tires. Now, only radial tires are used on passenger cars, the rolling resistance of which on rollers has practically not been studied. Therefore, returning to the study of this issue is relevant. The rolling resistance of wheels on the rollers of the stand will significantly affect the nature of their interaction during long-term running tests (due to increased heating of contacting bodies, power losses, violation of similarity conditions, etc.). It was found that the value of the rolling resistance coefficient noticeably depends on the ratio of the radii of the roller and the wheel, as well as the contact load, that is, the radial force of pressing the wheel against the roller, and in addition, on the speed and duration of the mode. The obtained results of the experiment made it possible to improve the theory of the interaction of a car wheel with the rollers of an inertial diagnostic stand. Also, the results of the experiments can be extended to different types of tires and the ratio of the radii of the wheel and roller.

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.

scholarly journals STUDY PERFORMANCE INDICATORS OF CAR REPAIR COMPLEX AND TRAFFIC SAFETY

2020 ◽  
Author(s):  
Igor Baranov ◽  
Maria Miroshnykova
Keyword(s):  
Traffic Safety ◽  
Block Diagram ◽  
Rolling Stock ◽  
Point System ◽  
Railway Transport ◽  
Specific Content ◽  
Root Cause ◽  
Labor Discipline ◽  
Factors Influencing ◽  
Main Factors

The article analyzes structure of cases lack cars, which includes technical aspects and factors labor discipline, attitude managers and executors to issues traffic safety. It has been established that 58% cases marriage are technological nature, 40% are due human factor and only 2% are due to technical reasons. The block diagram of systematization and structuring factors influencing conditions trouble-free work car-repair complex research range is developed and constructed. The main factors are part model safe operation of rolling stock are formulated. Model distribution basic lacks functioning car economy is constructed. Aspects application are determined. A model for monitoring degree professionalism of railway specialists as tool improve traffic safety in railway transport has been developed. The space indicators of intellectual and technological safety functioning car economy branch is defined. To increase length warranty areas, it is planned to create maintenance point system of network value, which has latest maintenance technology. The main types of marriage are: malfunction body and frame car; violation integrity brake line; malfunctions air distributors; adjustment brake lever transmission; malfunction automatic regulators car modes; auto-coupling breakage and cases self-disengagement; axle box failure. Checking consistency theoretical distribution of empirical frequencies is necessary establish adequacy mathematical model to real object study, namely failure rolling stock, which contributes occurrence cases of traffic safety violations. To select and substantiate theoretical laws distribution, the most common faults rolling stock on railway were investigated and statistical models distribution random variables over time were built. According block diagram of systematization and structuring factors influencing conditions accident-free operation car repair complex research site, main factors are 6. Each these factors is broken down into factors more specific content, and they are broken down into more detailed factors. Each factors is characterized by one or another aspect application depending on root cause and nature of occurrence (technical, technological, organizational).

scholarly journals TECHNICAL DIAGNOSTICS-GUARANTEE OF HIGH-QUALITY AND EFFECTIVE MAINTENANCE OF TIMBER ROLLING STOCK

2021 ◽  
Vol 10 (4) ◽  
pp. 208-216
Author(s):  
Konstantin Yakovlev ◽  
Sergey Legostaev
Keyword(s):  
Traffic Safety ◽  
Road Safety ◽  
Technical Condition ◽  
Rolling Stock ◽  
Technical Diagnostics ◽  
Control Room ◽  
Safe Operation ◽  
Standard Analysis ◽  
Remote Transmission ◽  
Diagnostics System

A logging vehicle is a source of increased danger, and its serviceability affects road safety. Diagnostics of the technical condition of the car allows you to timely identify serious defects in components, mechanisms and aggregates without removing them and disassembling them, to have time to eliminate malfunctions in time and bring the technical characteristics to the standard. Analysis of the literature data has shown that diagnostics of the technical condition of a logging vehicle plays an important role in preventing accidents. Our task was to improve the reliability of the car and reduce the complexity of work during the next maintenance. In the article, we justify the criteria necessary for the organization of safe operation of logging vehicles when transporting timber on public roads. The age and technical condition of the timber rolling stock fleet is analyzed. The most frequent failures of forest transport vehicles on the example of cars of the KAMAZ family, affecting the organization of traffic safety, are determined. The necessity of pre-trip control inspections and Express diagnostics of vehicles is revealed. Taking into account the identified shortcomings, the scheme of post-trip removal of parameters from the built-in diagnostics system of a logging vehicle and subsequent remote transmission of data to the server of the control room of a motor transport enterprise has been developed. The conducted scientific research allowed us to find a solution to the problem, which is to allocate technical diagnostics in an independent type of technical impact. This measure will reduce the costs of premature technical impacts on the systems, components and aggregates of timber rolling stock without reducing the requirements for traffic safety

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