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    Wyświetlanie 1-4 z 4
    Tytuł:
    Modelling of lake waves to simulate environmental disturbance to a scale ship model
    Autorzy:
    Rak, Andrzej
    Miller, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/34614624.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    wave modeling
    environmental disturbances
    scale ship model
    ship motion simulation
    Opis:
    In the development of ship motion control systems, software simulations or scale model experiments in pools or open water are very often carried out in the verification and testing stages. This paper describes the process of building a software wave simulator based on data gathered on the Silm Lake near Iława, Poland, where scale ship models are used for research and training. The basis of the simulator structure is a set of shaping filters fed with Gaussian white noise. These filters are built in the form of transfer functions generating irregular wave signals for different input wind forces. To enable simulation of a wide range of wind speeds, nonlinear interpolation is used. The lake wave simulation method presented in this paper fills a gap in current research, and enables accurate modelling of characteristic environmental disturbances on a small lake for motion control experiments of scale model ships.
    Źródło:
    Polish Maritime Research; 2023, 3; 12-21
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the impact of disruptions in ground handling on aircraft fuel consumption
    Autorzy:
    Gładyś, Sylwester
    Kwasiborska, Anna
    Postół, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/2203890.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    Simio
    modeling of services
    impact on the environment
    disturbances in ground handling
    modelowanie usług
    wpływ na środowisko
    zakłócenia w obsłudze naziemnej
    Opis:
    The authors of the paper distinguished two basic problems that occur during the ground handling of aircraft. The first one concerns the identification of disruptions during ground handling that have an impact on the scheduled completion of ground handling. The second problem is determining how these disturbances affect the environment by estimating the increased fuel consumption of the aircraft. In the first step, a catalog of disruptions in the ground handling process of the aircraft, which delays the performance of subsequent aircraft operations, was developed. Simio software was used to analyze the impact of disturbances on the performance of ground service, in which random disturbances were simulated. The simulation was run for several variants, taking into account the sample aircraft and various airlines. The developed model allows for the analysis of the impact of disturbances on the punctual performance of the ground service of the aircraft for various variants with given probability values. In the next step, simulations were performed to determine the impact of the disturbances on the increase in fuel consumption by the aircraft. Research has shown that even minor disruptions increase an aircraft’s fuel consumption over a 200-km flight path. The analyzes carried out in this work are of great importance for sales agents and airlines who strive to minimize the duration of elementary activities and eliminate threats during ground handling. Additionally, it is important from the point of view of environmental protection. As research has shown, even small disturbances can substantially increase fuel consumption, which is not beneficial for airlines. Past research has focused on the analysis of fuel consumption by aircraft and emissions during takeoff and landing operations and taxiing aircraft. There is a large correlation between the disturbances occurring at the parking place and increased fuel consumption, which is important from an economic and environmental point of view.
    Źródło:
    Transport Problems; 2022, 17, 2; 115--126
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Way of Simulation Transport Processes and Distrubances in Supply Chain
    Autorzy:
    Hoffa-Dabrowska, P.
    Pawlewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/409280.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    simulation
    transport processes
    modeling disturbances
    supply chain
    Opis:
    The paper presents a description of how to model the supply chain using simulation software. In order to make the best representation of reality, not only the route and the lorry’s speed are taken into account, but also the presence of various types of disturbances, like the occurrence of severe weather conditions or the inclusion of the driver’s breaks, according to the applicable regulations. The purpose of this article is to demonstrate how to model the disturbance and to present benefits of using of simulation programs to plan a route of transport.
    Źródło:
    Research in Logistics & Production; 2016, 6, 2; 141-153
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelowanie zaburzeń elektromagnetycznych w testach odporności
    Modelling of electromagnetic disturbances in immunity tests
    Autorzy:
    Gonscz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/153677.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    kompatybilność elektromagnetyczna
    modelowanie zaburzeń elektromagnetycznych
    testy odporności na zaburzenia
    badania symulacyjne
    electromagnetic compatibility
    modeling of electromagnetic disturbances
    immunity tests against disturbances
    computer simulations
    Opis:
    Publikacja dotyczy zagadnień modelowania wybranych zaburzeń elektromagnetycznych, wykorzystywanych w testach odporności urządzeń elektrotechnicznych. Modele analityczne, zweryfikowane badaniami symulacyjnymi oraz laboratoryjnymi, mogą być stosowane w wirtualnych testach odporności z użyciem oprogramowania symulacyjnego. Powyższa metoda stanowi alternatywę do rzeczywistych badań odporności niektórych urządzeń na etapie konstruktorskim. Testy symulacyjne pozwalają oszacować przewidywaną reakcję danego układu elektronicznego na wybrane zaburzenie elektromagnetyczne w fazie jego projektu, bez konieczności budowy prototypu.
    The paper deals with the modeling problems of selected electromagnetic disturbances for immunity tests of electrical equipments against conducted disturbances. The analytical models of disturbances can be used in virtual (computer simulations) immunity tests of electronic devices (EUT) against these disorders. The simulation process can be performed using typical and known PC applications (for example LTspice). The benefits of the virtual EMC analysis of some electronic devises are discussed in Section 1. The mathematical models of selected high voltage disturbances are presented in Section 2. The modelled waveforms of transient SURGE and EFT/Burst pulses are shown in Figs. 1 and 4. The electrical diagrams of virtual test generators are executed in LTspice application. The effects of operation of the generators are presented in the Fig. 3 and Fig. 6. Examples of virtual immunity tests of some typical electronic power supplies are made. The results of these tests are given in Section 3. The results of comparison of the virtual tests with the real laboratory tests are analyzed (Section 3). The virtual EMC tests are an alternative to the real laboratory tests. Simulation tests allow estimating the expected reaction of electronic equipment to a selected electromagnetic disturbance already in the design stage of this device. This method allows initially validating the design of a new device.
    Źródło:
    Pomiary Automatyka Kontrola; 2014, R. 60, nr 11, 11; 1025-1028
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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