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    Wyświetlanie 1-3 z 3
    Tytuł:
    Selected problems in railway vehicle dynamics related to running safety
    Autorzy:
    Kardas-Cinal, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/223589.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    railway vehicle
    dynamics
    running safety
    derailment
    pojazd kolejowy
    dynamika
    bezpieczeństwo
    wykolejenie
    Opis:
    The paper includes a short review of selected problems in railway vehicle-track system dynamics which are related to the running safety. Different criteria used in assessment of the running safety are presented according to the standards which are in force in Europe and other countries. Investigations of relevant dynamic phenomena, including the mechanism of railway vehicle derailment, and the resulting modifications of the running safety criteria are also discussed.
    Źródło:
    Archives of Transport; 2014, 31, 3; 37-45
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of a linear half-vehicle model for the optimization of damping in the passive suspension system of a railway car
    Autorzy:
    Lozia, Z.
    Kardas-Cinal, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/224025.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    railway vehicle
    suspension system
    damping coefficient
    optimization
    half-vehicle model
    pojazd kolejowy
    układ zawieszenia
    współczynnik tłumienia
    optymalizacja
    Opis:
    The paper presents a methodology of optimizing the parameters of the passive suspension system of a railway vehicle. A linear half-vehicle model and an example of the procedure carried out to optimize a selected parameter of the model have been demonstrated. A method of the selection of damping in the suspension system of a railway vehicle, based on over 40-year achievements of the cited authors of publications in the field of motor vehicles, has been shown. The optimization of linear damping in the secondary suspension system of a passenger carriage moving on a track with random profile irregularities has been described in detail. The algorithms adopted for the calculations have a wider range of applicability; especially, they may be used for determining the optimum values of the other parameters of the railway vehicle model under analysis, i.e. stiffness of the secondary suspension system as well as stiffness and damping of the primary suspension system.
    Źródło:
    Archives of Transport; 2016, 39, 3; 31-49
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transmission system model in the track-vehicle relationship based on Long Term Evolution technology
    Autorzy:
    Chrzan, Marcin
    Pirosz, Paweł
    Paś, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/27311803.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    rail traffic
    track vehicle
    safety
    telecommunications
    transport
    control
    operation
    ruch kolejowy
    pojazd szynowy
    bezpieczeństwo
    telekomunikacja
    kontrola
    operacja
    Opis:
    Because of degradations of the wired infrastructure connecting the element of railroad control systems, and related primarily to their destruction, the use of the radio transmission medium for independent management of railroad traffic control devices is increasingly being considered. An undoubted problem in implying such solutions is the security of transmission in such systems. It should be noted that security at a certain level of transmission is currently already offered by the radio transmission systems themselves, which has also been used in the GSM-R standard. The creation of a separate dedicated system for railroads involves huge expenditures for the design, testing, certification and, finally, construction and implementation of such technology. Therefore, in the opinion of the author of this dissertation, it is possible to use public open radio networks for the needs of railroads, which significantly reduces costs, since such a system is based on existing infrastructure. It is necessary to develop a way of transmitting information that meets the requirements of secure transmission in the sense of railroad traffic control systems. The task is to develop a general model for open radio transmission in traffic control systems based on the latest public radio standard, which is LTE, 5G or Future Railway Mobile Communications System (FRMCS). The article will present the concept of data transmission in the track–vehicle relationship with the use of LTE (Long Term Evolution) technology. It will show the concept of transmission based on the PN EN50159:2011 standard and the results of the tests conducted during control trips on the railway route. The main element that will be subject to the research will include the transmission safety and its delay. The impact of a type of transmission encryption on its delay will be estimated with the assumed blocks of data sent during the transmission. A probability distribution and density functions of the transmission delay probability distribution with the message sizes in the range from 16B to 10 kB with four ways of the signal encoding according to the PN-EN50159:2011 standard will be also analysed.
    Źródło:
    Archives of Transport; 2023, 66, 2; 89--108
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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