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Wyszukujesz frazę "Hamiltonian model" wg kryterium: Temat

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Development of a topology-based current-flux characteristic approximation in a Hamiltonian model of a reluctance machine
    Autorzy:
    Burlikowski, W.
    Kowalik, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/141438.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Hamiltonian model
    simplicial approximation
    reluctance machine
    triangulation refinement
    Opis:
    The paper presents an algorithm for the construction of an approximation of a highly nonlinear current-flux characteristic of a synchronous reluctance machine. Such an approximation is required in a Hamiltonian model of an electric machine and the constructed approximation is suited to be used in such a model. It employs a simplicial approximation based on irregular points sets in the spaces of currents and fluxes. The sets are constructed by the iterative insertion of new points. Initially the sets contain an arbitrarily small number of elements. The insertion is based on an approximation error calculation. Based on the sets containing possibly small number of elements, the proposed procedure leads to smooth and precise approximation. Due to the nonlinearity of the approximated characteristics, ambiguities can occur. A method for the triangulation refinement of the sets of currents and fluxes that eliminates them is also presented. In the paper, a reluctance machine model using the constructed approximation is described and compared with a model using the approximation based on regular sets.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 2; 277-289
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synchronous reluctance machine drive control with fast prototyping card implementation
    Autorzy:
    Burlikowski, Wojciech
    Kielan, Paweł
    Kowalik, Zygmunt
    Powiązania:
    https://bibliotekanauki.pl/articles/949906.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    direct torque control
    fast prototyping card
    Hamiltonian machine model
    synchronous reluctance motor
    Opis:
    The Synchronous Reluctance Machine (SynRM) is an electrical machine in which the useful electromagnetic torque is produced due to rotor saliency. Its high powerand torque-to-mass ratio and very good efficiency make it a cheap and simple alternative for permanent magnet or induction motors, e.g. in electromobility applications. However, because of magnetic nonlinearities, the rotational speed and torque control of a SynRM is a nontrivial task. In the paper, a control algorithm based on a Hamiltonian mathematical model is presented. The model is formulated using measurement results, obtained by the drive controller. An algorithm is tested in the drive system consisting of a SynRM with the classical rotor and a fast prototyping card. The drive dynamic response in transient states is very good, but the proposed algorithm does not ensure the best efficiency after steady state angular velocity is achieved.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 4; 757-769
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On kinetic Boltzmann equations and related hydrodynamic flows with dry viscosity
    Autorzy:
    Bogoliubov, N. N. (Jr.)
    Blackmore, D. L.
    Somoylenko, V. Hr.
    Prykarpatsky, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/255472.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    kinetic Boltzmann-Vlasov equations
    hydrodynamic model
    Hamiltonian systems
    invariants
    dynamical equivalence
    Opis:
    A two-component particle model of Boltzmann-Vlasov type kinetic equations in the form of special nonlinear integro-differential hydrodynamic systems on an infinite-dimensional functional manifold is discussed. We show that such systems are naturally connected with the nonlinear kinetic Boltzmann-Vlasov equations for some one-dimensional particle flows with pointwise interaction potential between particles. A new type of hydrodynamic two-component Benney equations is constructed and their Hamiltonian structure is analyzed.
    Źródło:
    Opuscula Mathematica; 2007, 27, 2; 187-195
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EMR study and superposition model analysis of Cr3+ and Fe3+ impurity ions in mullite powders used in aerospace industry
    Autorzy:
    Stefaniuk, I.
    Rogalska, I..
    Powiązania:
    https://bibliotekanauki.pl/articles/146307.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    electron magnetic resonance (EMR)
    mullites
    spin Hamiltonian (SH)
    superposition model (SPM)
    Opis:
    In this work, the electron magnetic resonance (EMR) spectra of the mullites powders were measured for different grain sizes (0.07 and 0.12 mm). We have used EMR spectroscopy at X-band, combined with superposition model (SPM) calculations to reveal electronic structure and establish correlations between structure, and surroundings of these complexes.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 1; 399-403
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer program superposition model - Monte Carlo (SPM-MC) and its applications in EMR studies of transition ions at low symmetry sites Fe3+ doped YAP crystals
    Autorzy:
    Stefaniuk, I.
    Rudowicz, Cz.
    Powiązania:
    https://bibliotekanauki.pl/articles/146564.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    superposition model (SPM)
    spin Hamiltonian (SH)
    yttrium aluminum perovskite (YAP)
    YAlO3
    Opis:
    An extension of the computer program superposition model-Monte Carlo (SPM-MC), designed for modelling of the spectroscopic and structural properties of transition ions at low symmetry sites in crystals, is presented. Special focus is put on two aspects. The first aspect concerns the effects of variation of the superposition model (SPM) parameters, i.e. the intrinsic parameters (b2, b4) and power low exponents (t2, t4), on the quality of fittings of experimental data and theoretical predictions. This enables to increase the reliability of the modelling results. The second aspect concerns the implications of low site symmetry on modelling of the pertinent properties. Applications of the program SPM-MC to Fe3+ ions at the triclinic (Ci) symmetry sites in YAlO3 (YAP) crystals are considered.
    Źródło:
    Nukleonika; 2013, 58, 3; 397-400
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model reduction techniques for linear constant coefficient port-Hamiltonian differential-algebraic systems
    Autorzy:
    Hauschild, Sarah-Alexa
    Marheineke, Nicole
    Mehrmann, Volker
    Powiązania:
    https://bibliotekanauki.pl/articles/970123.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    structure-preserving model reduction
    index reduction
    port-Hamiltonian differential-algebraicsystem
    moment matching
    effort constraint method
    flow constraint method
    Opis:
    The aim of this paper is to combine model order reduction for differential-algebraic equations with port-Hamiltonian structure preservation. For this, we extend two classes of model reduction techniques (reduction of the Dirac structure and moment matching) to handle port-Hamiltonian differential-algebraic equations. The performance of the methods is investigated for benchmark examples, originating from semi-discretized flow problems and mechanical multibody systems.
    Źródło:
    Control and Cybernetics; 2019, 48, 1; 125-152
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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