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    Wyświetlanie 1-3 z 3
    Tytuł:
    New solutions to a multi-objective benchmark problem of induction heating: an application of computational biogeography and evolutionary algorithms
    Autorzy:
    Di Barba, P.
    Dughiero, F.
    Forzan, M.
    Mognaschi, M. E.
    Sieni, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/140925.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    induction heating
    multi-physics analysis
    multi-objective optimization
    benchmark
    Opis:
    In induction heating the design of the inductor implies the solution of coupled electromagnetic and thermal fields, along with the use of optimal design procedures to identify the best possible device or process. The benchmark model proposed, a graphite disk heated by means of induction, is optimized using different optimization algorithms. The design aim requires to achieve a prescribed and uniform temperature distribution in the workpiece maximizing the system efficiency.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 1; 139-149
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The MOORA method and its application to privatization in a transition economy
    Autorzy:
    Brauers, W. K.
    Zavadskas, E. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/969961.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    multi-objective optimization
    alternative measurement
    discrete alternatives
    ratio analysis
    sub-objectives
    reference point method
    Opis:
    A new method is proposed for multi-objective optimization with discrete alternatives: MOORA (Multi-Objective Optimization on the basis of Ratio Analysis). This method refers to a matrix of responses of alternatives to objectives, to which ratios are applied. A well established other method for multi-objective optimization is used for comparison, namely the reference point method. Later on, it is demonstrated that this is the best choice among the different competing methods. In MOORA the set of ratios has the square roots of the sum of squared responses as denominators. These ratios, as dimensionless. seem to be the best choice among different ratios. These dimensionless ratios, situated between zero and one, are added in the case of maximization or subtracted in case of minimization. Finally, all alternatives are ranked, according to the obtained ratios. Eventually, to give more importance to an objective, an objective can be replaced by different sub-objectives or a coefficient of importance can be specified. An example on privatization in a transition economy illustrates the application of the method. If application is situated originally in a "welfare" economy, centered on production, MOORA becomes even more significant in a 'wellbeing economy", where consumer sovereignty is assumed.
    Źródło:
    Control and Cybernetics; 2006, 35, 2; 445-469
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scaling laws for the FE solutions of induction machines
    Autorzy:
    Nell, Martin
    Lenz, Jonas
    Hameyer, Kay
    Powiązania:
    https://bibliotekanauki.pl/articles/141030.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    evolutionary strategy
    finite element method analysis
    induction machine
    induction motor
    loss calculation
    multi-objective optimization
    scaling laws
    Opis:
    In this paper a scaling approach for the solution of 2D FE models of electric machines is proposed. This allows a geometrical and stator and rotor resistance scaling as well as a rewinding of a squirrel cage induction machine enabling an efficient numerical optimization. The 2D FEM solutions of a reference machine are calculated by a model based hybrid numeric induction machine simulation approach. In contrast to already known scaling procedures for synchronous machines the FEM solutions of the induction machine are scaled in the stator-current-rotor-frequency-plane and then transformed to the torque-speed-map. This gives the possibility to use a new time scaling factor that is necessary to keep a constant field distribution. The scaling procedure is validated by the finite element method and used in a numerical optimization process for the sizing of an electric vehicle traction drive considering the gear ratio. The results show that the scaling procedure is very accurate, computational very efficient and suitable for the use in machine design optimization.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 3; 677-695
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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