Computers in Railways XVI : Railway Engineering Design and Operation最新文献_第4页

USE OF ONTOLOGY FOR DATA INTEGRATION IN A DEGRADED MODE SIGNALLING SYSTEM 在退化模式信号系统中使用本体进行数据集成

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180191

Christopher Morris, J. Easton

引用次数: 2

AN IMPROVED POWER SUPPLY SYSTEM FOR NEUTRAL SECTIONS IN RAILWAY ELECTRIC POWER SYSTEMS 一种改进的铁路电力系统中性段供电系统

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/cr180041

I. Park, Byoung-Gon Lee, Ju-Rak Kim, Jangmu Lee

{"title":"AN IMPROVED POWER SUPPLY SYSTEM FOR NEUTRAL SECTIONS IN RAILWAY ELECTRIC POWER SYSTEMS","authors":"I. Park, Byoung-Gon Lee, Ju-Rak Kim, Jangmu Lee","doi":"10.2495/cr180041","DOIUrl":"https://doi.org/10.2495/cr180041","url":null,"abstract":"In order to ensure the necessary level of electrical isolation between neighbouring substations, it is essential that the neutral sections should be installed. The neutral section provides the necessary electrical isolation between the substations. An added benefit of such configuration is that it can offer the flexibility of the changing the source of power to certain feeder segments. If necessary, individual feeder segment can be cut off from its main power while the continuation of the feeder service is guaranteed by a nearby substation. However, the existence of the neutral section in the feeder line means the loss of traction power when an electric locomotive passes through the section. Because of no traction power, the speed of the train cannot be regulated. Usually, the speed slows down during the passage of the section. Such loss of the speed might introduce a significant amount of delay in the total travel time of the train. Moreover, if the speed of the locomotive happens to be almost standstill when it enters the section, then there is a good chance to see that it would stop in the middle of the section. Then, it is unable to escape the section unless a helping locomotive is to be dispatched there to draw the train out of the section. Therefore, there has been much attention and research effort into the issue of ensuring proper power supply to the section. In this paper, an improved approach to the power supply system to the neutral section is proposed. In this approach, a modern power electronics topology of MMC (Modular Multi-level Converter) is introduced as part of the main power supply system. The effectiveness of the proposed system was verified through realistic real-time simulation results.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131228769","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}

引用次数: 1

SUPPRESSION OF VERTICAL VIBRATION IN RAILWAY VEHICLE CARBODIES THROUGH CONTROL OF DAMPING FORCE IN PRIMARY SUSPENSION: PRESENTATION OF RESULTS FROM RUNNING TESTS WITH METER-GAUGE CAR ON A SECONDARY LINE 通过控制主悬架阻尼力来抑制轨道车辆车体的垂直振动:介绍了在二线线路上用米规车运行试验的结果

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180301

Y. Sugahara, T. Kojima

{"title":"SUPPRESSION OF VERTICAL VIBRATION IN RAILWAY VEHICLE CARBODIES THROUGH CONTROL OF DAMPING FORCE IN PRIMARY SUSPENSION: PRESENTATION OF RESULTS FROM RUNNING TESTS WITH METER-GAUGE CAR ON A SECONDARY LINE","authors":"Y. Sugahara, T. Kojima","doi":"10.2495/CR180301","DOIUrl":"https://doi.org/10.2495/CR180301","url":null,"abstract":"To improve vertical ride comfort in railway vehicles, the suppression of vertical bending-mode vibration and rigid-body-mode vibration in the carbody is essential. Primary suspension damping control systems, designed to reduce bending mode vibrations in carbodies for high-speed trains, have been proposed in the past. These systems consist of variable vertical dampers affixed to the primary suspension, accelerometers attached to the bogie frames, and a controller. Results from vehicle running tests carried out on a number of Shinkansen lines demonstrated that these systems reduced the power spectral density (PSD) peak value of vertical carbody vibration accelerations in the first-bending-mode by 80 per cent compared to when the system was not used. This paper reports on the application of this system to a meter-gauged vehicle. Vehicle running tests were carried out on a secondary meter-gauge line at moderately high running speeds (about 100 km/h or lower). Test results showed that the system reduced the PSD peak of vertical vibration accelerations stemming from bending-mode vibrations of the carbody by almost 90 per cent thanks to an LQG controller tuned for reducing bending-mode vibrations. When vehicles run at low speed (about 60 km/h) on secondary lines, the rigid-body-mode vibrations of the carbody in the 1–2 Hz frequency range tend to increase from time to time. The system was therefore also applied to reduce these vibrations. Results from vehicle running tests applying the LQG controller that had been re-tuned for reducing rigid-body-mode vibrations, showed that the PSD peak in vibration accelerations at 1.2 Hz was reduced by half.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132160248","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}

引用次数: 4

INTRODUCING AUTOMATIC ULTRASONIC INSPECTION TECHNOLOGY TO WELDED RAILS ON A FLEXIBLE FLOATING RAILWAY BRIDGE 介绍了柔性浮式铁路桥焊接轨道的自动超声检测技术

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180371

Hyung-suk Mun, S. Seo

引用次数: 0

RECENT RESTORATION OF SKIP-STOP OPERATION IN THE KOREAN URBAN RAILWAY 最近，韩国城市铁路恢复了跳站运营

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180251

Suk-Mun Oh, K. Kim, Hag-Lae Rho, Keun-Yul Yang

引用次数: 2

TRENISSIMO: IMPROVING THE MICROSCOPIC SIMULATION OF RAILWAY NETWORKS 改进铁路网的微观模拟

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180181

S. D. Fabris, G. Medeossi, G. Montanaro

{"title":"TRENISSIMO: IMPROVING THE MICROSCOPIC SIMULATION OF RAILWAY NETWORKS","authors":"S. D. Fabris, G. Medeossi, G. Montanaro","doi":"10.2495/CR180181","DOIUrl":"https://doi.org/10.2495/CR180181","url":null,"abstract":"Railway is a complex system. Infrastructure, rolling stock and timetable interact together with human factors and daily disturbances. Microscopic simulation is the most accurate technique to model and quantitatively represent these complex interactions and support railway undertakings at all stages of planning. The most widely-used simulation tools were developed several years ago and have since then maintained their original principles. But, in the era of Big Data the availability of large amounts of extremely accurate train tracking data and the increased computational power allows modelling reality at a higher level of detail without exceeding the reasonable computation times. The new trenissimo tool was developed with the specific aim of obtaining a more realistic simulation of railway operations, combining new characteristics and functionalities not yet or only in part implemented in the existing tools. One of the most important innovations is the representation of both drivers and dispatchers as agents, who respectively drive the trains following the timetable and signalling/ATP system and control them based on given criteria or algorithms. A second characteristic is the control of signals: as in the reality, the block signals are automatically switched to green, while the others are operated by the dispatchers. A third is the possibility to consider in real time the impact of the number of passengers waiting at the platform on the dwell time of trains, and thus correctly represent their effect, especially on high-frequency services. The paper describes in detail these innovative functions and shows the results of the first tests performed on two lines.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131120569","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}

引用次数: 7

MEASURES FOR ENSURING THE SAFETY AND SECURITY OF AUTOMATED OPERATION OF PUBLIC TRANSPORTATION IN JAPAN 日本公共交通自动化运行安全保障措施

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180351

T. Mizuma

引用次数: 0

FORMAL MODELING AND DATA VALIDATION OF GENERAL RAILWAY INTERLOCKING SYSTEM 铁路通用联锁系统形式化建模与数据验证

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180471

Wang Keming, Wang Zheng, Zhang Chuandong

引用次数: 4

DEVELOPMENT OF A DYNAMIC TRACK MEASURING DEVICE FOR GAUGE AND TWIST TO REDUCE DERAILMENT ACCIDENTS 为减少列车脱轨事故，研制动态轨距和扭距测量装置

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180231

Y. Tsubokawa, T. Ishikawa

{"title":"DEVELOPMENT OF A DYNAMIC TRACK MEASURING DEVICE FOR GAUGE AND TWIST TO REDUCE DERAILMENT ACCIDENTS","authors":"Y. Tsubokawa, T. Ishikawa","doi":"10.2495/CR180231","DOIUrl":"https://doi.org/10.2495/CR180231","url":null,"abstract":"The track measuring car is very expensive, so static measurement is being carried out not only at regional railway operators but also at major railway operators when it comes to lines in the yard. However, the device for static measurement is lightweight, so it is not possible to obtain dynamic track irregularities due to the wheel load and lateral force during a vehicle running. Therefore, in such a section of the line, a derailment accident may occur when dynamic track irregularity is large due to deterioration of track materials. From the above, with the aim of further reducing derailment accidents, we are developing a low cost measuring device for measuring gauge and twist affecting the driving safety of the vehicle which can be easily mounted on a motor car. This device measures the relative displacement between the device and the rail by the two-dimensional laser sensor and can display the rail profile of the measurement position during data processing. Therefore, when large measurement values are seen, it is possible to grasp whether there is a significant track irregularity at the site or an error at the time of measurement. In addition, we developed a mounting method using the traction coupler of track motor car or bolts for installing the guard iron of passenger vehicles, and carried out the running test at a speed of up to 40km/h to confirm the measuring performance. As a result of calculating the reproducibility (standard deviation of the difference between the two measured values) using measurement data of various speeds, it is confirmed that this device has measurement accuracy equivalent to that of the existing track measuring car. In this paper, we report the outline of the measuring device and the results of running tests conducted to confirm its performance.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129125435","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}

引用次数: 3

IMPROVING SAFETY BY INTEGRATING DYSFUNCTIONAL ANALYSIS INTO THE DESIGN OF RAILWAY SYSTEMS 通过将功能失调分析整合到铁路系统设计中来提高安全性

Computers in Railways XVI : Railway Engineering Design and Operation Pub Date : 2018-07-02 DOI: 10.2495/CR180361

Sana Debbech, P. Bon, S. Collart-Dutilleul

{"title":"IMPROVING SAFETY BY INTEGRATING DYSFUNCTIONAL ANALYSIS INTO THE DESIGN OF RAILWAY SYSTEMS","authors":"Sana Debbech, P. Bon, S. Collart-Dutilleul","doi":"10.2495/CR180361","DOIUrl":"https://doi.org/10.2495/CR180361","url":null,"abstract":"In order to cope with the increasing design complexity of safety-critical systems, safety assurance should be considered as early as possible in the design process. Using Model-Based System Engineering (MBSE) approaches however lead to new challenges regarding the cohesive integration of both safety engineering and system design along the system development process. Moreover, it helps to anticipate safety problems and detect errors as soon as possible. This is the case of railway systems, which are complex socio-technical systems. From this point of view, the purpose of the present study is to formalize a safety reasoning based on the definition of critical scenarios. The objective is to propose a proactive approach that takes these requirements into account early in the system architecture design. By identifying the impact on the design of the architecture, we will ensure safety by integrating technical devices and human interventions. Based on the related literature, the Preliminary Risk Analysis (PRA) is attested to define safety conditions. These safety requirements are expressed with a high level of abstraction according to the level of knowledge engineering. Qualitative risk analysis methods, such asion according to the level of knowledge engineering. Qualitative risk analysis methods, such as Fault Tree Analysis (FTA) will be used to analyze the propagation of failures. The second challenge is to trace the high level requirements during the design steps. In order to help the designer to consider safety aspect in the system architecture synthesis, we integrate safety concerns from early design stages, within the MBSE approach. In this paper, we propose a methodology to effectively identify safety conditions, thus to anticipate risks. We also focus our work on the European Railway Traffic Management System (ERTMS). Finally, we applied specific transformation rules on our ERTMS ontology in order to build a Unified Modeling Language (UML) model.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130875754","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}

引用次数: 6