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Wyświetlanie 1-3 z 3
Tytuł:
Characteristics of event recorders in automatic train control systems
Autorzy:
Jacyna, M.
Szczepański, E.
Izdebski, M.
Jasiński, S.
Maciejewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/224106.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rail transport
CBTC
ATC
JRU
Automatic Train Control
Communications-Based Train Control
Juridical Recording Unit
event recording unit
transport kolejowy
sterowanie pociągiem
Opis:
The development of railway transport in the current times is very noticeable, it is connected with the growing needs of movement as well as the development of information engineering. The increase in the demand for transport requires the implementation of solutions that increase the efficiency of the transport system. Both long-distance, agglomeration and metro railways can use different systems due to their specificity. Nevertheless, there is a noticeable trend in the development of systems supporting or even replacing the driver by the automation of selected activities. Such systems allow to reduce trains headway and thus increase the capacity of the line. CBTC class systems (Communications-based train control) belong to automatic train systems and are based on wireless transmission. The main purpose of using such systems is to increase the frequency of running trains while maintaining the level of safety. Computers that are on the system equipment record, process and analyse very large amounts of data. An essential element of such systems are recording units. The parameter recorders can be divided into technical and legal ones. However, for CBTC class systems, there is no obligation or requirement to use legal recorders as it is in the case of ETCS. However, it is necessary to use event recorders, and these are subject to the requirements set out in the PN-EN 62625-1: 2014 standard. The recorders are a very important component of safety systems, which is why they were analysed in this article. Both the driver, the vehicle and the infrastructure should be subject of continuous monitoring. The occurrence of an adverse event (not necessarily leading to an incident or accident) should be analysed and used to improve safety procedures. Currently, automatic systems are still developing and we are not able to accurately assess what the causes and effects of certain events may be, which is why data collection and analysis is particularly important. The article presents the general specification of the CBTC system. The parameters and properties of driving recorders should be presented. This article is cofinanced by the European Union POIR.01.01.01-00-0276/17
Źródło:
Archives of Transport; 2018, 46, 2; 61-70
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Functional safety verification of train control procedure in train-centric CBTC by colored Petri net
Autorzy:
Lin, Junting
Xu, Qian
Powiązania:
https://bibliotekanauki.pl/articles/949829.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
train control procedure
Train-centric CBTC
functional safety
formal methods
colored Petri net
procedura kontroli pociągu
sterowanie pociągiem
bezpieczeństwo funkcjonalne
metody formalne
sieci Petriego
Opis:
Communication-based Train Control (CBTC) system is a widely-used signaling system. There is an increasing demand for innovating the traditional ground-centric architecture. With the application of train-train communication, object control and other advanced techniques, Train-centric CBTC (TcCBTC) system is expected to be the most promising tendency of train control system. The safe tracking interval would be reduced as well as the life-cycle costs. Formal methods play an essential role in the development of safety-critical systems, which provides an early integration of the verifiable design process. In the paper, the architecture design of TcCBTC is first analyzed. The official system specification of TcCBTC has not issued, so it takes efforts to perform the systematic summarization of the functional requirements. Secondly, we propose an integrated framework that combines the Colored Petri Net (CPN) models with the functional safety verification of the underlying systems. Functional safety depends on the logic accuracy and is a part of overall safety. The framework also specifies what kinds of functions, behaviors or properties need to be verified. The train control procedure of TcCBTC is regarded as the link among new functional modules, thus it is chosen as the modelling content. Thirdly, the scenarios and the color sets are prepared. Models are established with the novel design thought from top to bottom. Simulation and testing are implemented during the model establishment to discover the apparent errors. Lastly, the model checking by state space is performed. All possible states are checked in detail. Standard behavioral properties and other user-defined properties are verified by state space report and ASK-CTL (Computation Tree Logic) queries, respectively. Verification results reveal that the models are reasonable to depict the dynamic behaviors of train control procedure. The functional safety properties are satisfied and prepared for further drafting the system functional specification.
Źródło:
Archives of Transport; 2020, 54, 2; 43-58
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kierowanie i sterowanie pociągów bez maszynisty na przykładzie systemu SelTrac
Railway traffic operation management and control for driverless trains based on the example of SelTrac system
Autorzy:
Bugaj, A.
Kochan, A.
Powiązania:
https://bibliotekanauki.pl/articles/248612.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
system kierowania i sterowania ruchem kolejowym
stanowisko dyspozytora
cbtc
pociąg bez maszynisty
system of the railway traffic supervisory and control
train dispatcher workstation
communication based train control
driverless train
Opis:
Różne odmiany systemu SelTrac zastosowano w systemach szybkich tramwajów, lekkich kolejek miejskich, automatycznych kolejek lotniskowych oraz na liniach metra. Wszystkie wersje systemu SelTrac opierają się na dwukierunkowej, bezprzewodowej, bezpiecznej transmisji tor-pojazd, dlatego są zaliczane do klasy systemów cbtc (Communication Based Train Control). W ramach prac Wydziału Transportu PW nad rozwojem systemów ksr dokonano analizy tego systemu pod kątem możliwości pozyskiwania informacji dla dyspozytury. Jako podstawę do analizy wybrano linie automatycznej kolejki DLR oraz linie metra Jubilee w Londynie. W artykule przedstawiono ogólny opis systemu SelTrac oraz stanowiska dyspozytora. Omówiono niektóre aspekty kierowania ruchem pociągów w tym systemie.
The various types of SelTrac system have been applied in fast tramway systems, light rail systems, automated rail transit systems and undergrounds. All versions of SelTrac system are based on bidirectional, wireless, safe track-vehicle transmission, so they are numbered as cbts (Communication Based Train Control).class of systems. In frame works under krs systems development run by the Transport Department of PW the analysis of the system towards its ability to collect data for train dispatchers have been carried out. As the basis of analysis the automated rail transit lines DLR and Jubilee underground lines in London have been selected. The general description of SelTrac system and the train dispatcher workstation have been presented in the paper. Some aspects of train management in this system have been described.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2011, 96, z. 158; 55-65
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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