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    Wyświetlanie 1-4 z 4
    Tytuł:
    Multicriteria train running model and simulator for railway capacity assessment
    Autorzy:
    Wojnar, Grzegorz
    Irlik, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/2203893.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    railway signalling
    train simulation
    simulator
    control
    sygnalizacja kolejowa
    symulacja pociągu
    symulator
    kontrola
    Opis:
    Railway line capacity is growing in importance as a criterion for the assessment of railroad infrastructure performance. This problem is becoming more and more relevant as the demand for rail transport increases, especially considering the transport policy related to the promotion of climate-neutral means of transport. Insufficient capacity affects the stability and reliability of railway traffic operations. The analytical methods used for capacity estimation are typically insufficient to solve problems of a multicriteria nature (i.e. problems which take traffic heterogeneity and human factors into account). Optimisation methods, on the other hand, usually yield the best results if the current timetable for a given line is known. Additionally, they do not strongly consider the impact of the running characteristics of a specific train type and of the system or several systems in operation on the line (e.g. national Class B system and ERTMS/ETCS system). Therefore, this paper proposes a model and a simulation program developed in the Matlab and Simulink environment to be used to simulate on-route train movement, to study railroad capacity with different control systems, as well as for predictive train control to minimise energy losses. The authors described the assumptions adopted for the simulation program and the input parameters configurable against a specific line segment. They also discussed selected results derived from simulations of controlling the departure of trains to a railway line with the purpose of energy loss reduction.
    Źródło:
    Transport Problems; 2022, 17, 2; 199--212
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Generating and modeling of braking curve and the assessment of the quality of automatic stopping of the train
    Autorzy:
    Anuszczyk, J.
    Gocek, A.
    Pacholski, K.
    Dominikowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/374056.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    train
    braking
    docking
    quality factor
    controller
    simulation
    pociąg
    hamowanie
    dokowanie
    wskaźnik jakości
    kontroler
    symulacja
    Opis:
    This paper presents the theory about generating the braking curve and the analysis of the influence of the braking controller parameters on the generation of the braking curve of the train. In this paper, computed examples of braking quality developed using generic quality factor are shown, and on the basis of the calculations, weight components of the factor and an additional criterion for assessing the quality of braking were proposed. It has been demonstrated that the developed algorithms can be used to verify the effectiveness of the braking controller and the adjustment of the terms, and the change of these algorithms affects the shape of the generated braking curve of the train. It has been shown that the analysis of a failure of the propulsion car revealed the existence of a safe braking area. The performed statistical analysis confirmed the normal distribution of the scatter of braking results, for which the regression model fitted.
    Źródło:
    Transport Problems; 2018, 13, 2; 13-25
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approach method for flexible reallocation of reserved seats on long - distance trains
    Autorzy:
    Grunewald, Erik
    Rudolph, Florian
    Tremer, Daria
    Powiązania:
    https://bibliotekanauki.pl/articles/2098080.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    passenger change
    pedestrian simulation
    seat reservation
    long distance train
    zmiana pasażera
    symulacja ruchu pieszego
    rezerwacja miejsc
    pociąg dalekobieżny
    Opis:
    Finding a reserved seat on long-distance train travel is supported by aids on platforms and within the train in order to keep the passenger’s journey as short as possible and to minimise unnecessary walking within the train. The allocation of a seat to a carriage number on the reservation and the consideration of the carriage position indicator devices on the platform provide the opportunity to wait for the arrival of the train on a section of the platform that is close to the reserved seat. Nevertheless, there are various situations in reality in which this can only be achieved to a limited extent. Varying carriage order, the provision of a replacement train or tight transfer connection can lead to the train being entered at an unfavourable position. This is followed by the passenger trying to find a seat on the train which can amount to considerable traffic. Equipped with a flexible seat reservation procedure, this kind of traffic could be drastically reduced. The solution provides the opportunity to reallocate reserved seats in order to minimize the way a passenger has to walk inside the train to his seat. By means of microscopic simulations, various boarding scenarios demonstrate the effectiveness of this approach. Less passenger movement on the train results in an increase in passenger comfort and reduces the space that is required for such movement, which could instead be used for other purposes. On the platform, this procedure means that passengers no longer need to wait for the arrival of the train at a location that is closest to the allocated seat. Instead, passengers can choose a place on the platform convenient to them, without this having a disruptive effect on system performance.
    Źródło:
    Transport Problems; 2021, 16, 1; 87--100
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction and validation for the aerodynamic noise of high-speed train power car
    Autorzy:
    Jiang, S.
    Yang, S.
    Wu, D.
    Wen, B-Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/375504.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    aerodynamic noise
    high-speed train
    Lighthill-Curle theory
    simulation model
    online test
    hałas aerodynamiczny
    pociąg ekspresowy
    teoria Lighthilla-Curle
    model symulacyjny
    test online
    Opis:
    The aerodynamic noise of high-speed train power car was investigated in this article. The full-scale power car was first modeled, and the external steady flow field was computed by a realizable k-ε turbulence model. The aerodynamic noise sources of the power car surface and the external transient flow field were then calculated by broadband noise source model and large eddy simulation (LES) model, respectively. The static pressures on the train surface were obtained from the results of the transient model. Considering the transient flow field, the far-field aerodynamic noise generated by the power car was finally derived from Lighthill-Curle theory. It was validated by means of on-line tests that have been performed along a real high-speed railway line. Through comparisons between simulations and measurements, it is shown that the simulation model gives reliable aerodynamic noise predictions. We foresee numerous applications for modeling and control of the aerodynamic noise in high-speed train.
    Źródło:
    Transport Problems; 2018, 13, 2; 91-102
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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