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    Wyświetlanie 1-11 z 11
    Tytuł:
    Partial Reconfiguration in the Field of Logic Controllers Design
    Autorzy:
    Doligalski, M.
    Bukowiec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/227174.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    HCfgPN
    UML state machine diagram
    Verilog
    logic controller
    Opis:
    The paper presents method for logic controllers multi context implementation by means of partial reconfiguration. The UML state machine diagram specifies the behaviour of the logic controller. Multi context functionality is specified at the specification level as variants of the composite state. Each composite state, both orthogonal or compositional, describes specific functional requirement of the control process. The functional decomposition provided by composite states is required by the dynamic partial reconfiguration flow. The state machines specified by UML state machine diagrams are transformed into hierarchical configurable Petri nets (HCfgPN). HCfgPN are a Petri nets variant with the direct support of the exceptions handling mechanism. The paper presents placesoriented method for HCfgPN description in Verilog language. In the paper proposed methodology was illustrated by means of simple industrial control process.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 4; 351-356
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated analytical-field design method of multi-disc magnetorheological clutches for automotive applications
    Autorzy:
    Kluszczyński, Krzysztof
    Pilch, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/2086881.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electromechanical convertor
    drive system component
    electromagnetic calculations
    MR fluids
    magnetorheological fluids
    MR multi-disc clutch
    multi-disc magnetorheological clutch
    clutch design
    analytical field
    design
    przetwornik elektromechaniczny
    element układu napędowego
    obliczenia elektromagnetyczne
    płyny MR
    płyny magnetoreologiczne
    wielotarczowe sprzęło magnetoreologiczne
    sprzęgło wielotarczowe
    projektowanie
    Opis:
    This study proposes a new integrated analytical-field design method for multi-disc magnetorheological (MR) clutches. This method includes two stages, an analytical stage (composed of 36 algebraic formulas) and a field stage based on the finite element method (FEM). The design procedure is presented systematically, step-by-step, and the results of the consecutive steps of the design calculations are depicted graphically against the background of the entire considered clutch. The essential advantage of the integrated method with this two-stage structure is the relatively high accuracy of the first analytical stage of the design procedure and the rapid convergence of the second field stage employing the FEM. The essence of the new method is the introduction of a yoke factor ky (the concept of which is based on the theory of induction machines) that determines the ratio of magnetomotive force required to magnetise the entire magnetic circuit of the clutch to the magnetomotive force required to magnetise the movement region. The final value, the yoke factor ky is determined using loop calculations. The simplicity of the developed design method predisposes its use in optimisation calculations. The proposed method can also be adapted to other MR devices analysed in shear mode.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 6; e139392, 1--15
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of the Magnetic Field Using Transversal 3D Coil System
    Autorzy:
    Garda, B.
    Galias, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/227140.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gradient coils
    homogeneous magnet design
    optimization
    Opis:
    Magnetic field is usually generated using magnets realized as a set of simple coils. In general, those magnets generate magnetic field with nonzero components in all directions. Usually during the design process only one component of the magnetic field is taken into account, and in the optimization procedure the currents and positions of simple coils are found to minimize the error between the axial component of the magnetic field and the required magnetic field in the ROI. In this work, it is shown that if the high quality homogeneous magnetic field is generated then indeed one may neglect non-axial components. On the other hand, if the obtained magnetic field is not homogeneous either due to design requirements of too restrictive constrains, then all other components may severely deteriorate the quality of the magnetic field. In the second part of the paper, we show how to design a 3D transversal coil system to solve problems which are intractable in the 1D case.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 2; 205-210
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and Designing Acoustical Conditions of the Interior – Case Study
    Autorzy:
    Kostek, B.
    Laskowski, S.
    Mizgier, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/176652.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acoustic field analysis
    acoustic field modeling
    acoustic conditions measurements
    acoustic conditions analysis
    sound reinforcement system design
    Opis:
    The primary aim of this research study was to model acoustic conditions of the Courtyard of the Gdańsk University of Technology Main Building, and then to design a sound reinforcement system for this interior. First, results of measurements of the parameters of the acoustic field are presented. Then, the comparison between measured and predicted values using the ODEON program is shown. Collected data indicate a long reverberation time which results in poor speech intelligibility. Then, a thorough analysis is perform to improve the acoustic properties of the model of the interior investigated. On the basis of the improved acoustic model two options of a sound reinforcement system for this interior are proposed, and then analyzed. After applying sound absorbing material it was noted that the predicted speech intelligibility increased from bad/poor rating to good category.
    Źródło:
    Archives of Acoustics; 2016, 41, 3; 473-484
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and simulation of disk stepper motor with permanent magnets
    Autorzy:
    Kaňuch, J.
    Ferková, Ž.
    Powiązania:
    https://bibliotekanauki.pl/articles/141673.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Stepper motor
    disk rotor
    permanent magnet
    magneto-static field simulation
    Opis:
    In this paper the design and the magneto-static simulation of axial-flux permanent- magnet stepper motor with the disc type rotor is presented. Disk motors are particularly suitable for electrical vehicles, robots, valve control, pumps, centrifuges, fans, machine tools and manufacturing. The brushless machine with axial flux and permanent magnets, also called the disc-type machine, is an interesting alternative to its cylindrical radial flux counterpart due to the disk shape, compact construction and high torque density. This paper describes a design of four phase microstepping motor with the disc type rotor. The FEM modeling and the 3D magneto-static simulation of the disk stepper motor with permanent magnets is being subject of the article, too. Disc rotor type permanent magnet stepper motor for high torque to inertia ratio is ideal for robotics and CNC machines.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 2; 281-288
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deformation of geosynthetic reinforced soil structures by design, in the lab and in the field
    Autorzy:
    Heerten, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/230977.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    struktura gruntu
    geosyntetyk
    odkształcenie
    grunt zbrojony
    soil structure
    geosynthetic
    deformation
    reinforced soil
    Opis:
    Green-geo-engineering with geosynthetic reinforced soil structures is of increasing practice around the world. Poland is among the leading countries with the third biggest geogrid market in Europe. The German EBGEO 2010 Guideline for Soil Reinforcement with Geosynthetics as first European Guideline for Geosynthetics linked to the Eurocode 7, and the new design code for Japanese railway structures under seismic loading are introduced. New research results from the Geotechnical Institute of the RWTH Aachen, Germany, dealing with the soil/reinforcement interaction and new approaches for design codes for the reinforcement of base courses in traffic areas based on lab and field tests in the USA are presented.
    Źródło:
    Archives of Civil Engineering; 2011, 57, 2; 153-171
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of a race-track coil for measurements of AC power losses in high-temperature superconducting tapes
    Autorzy:
    Trojanowski, S.
    Ciszek, M.
    Maievskyi, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/963873.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnetic field
    race-track coils
    AC losses
    superconducting tapes and wires
    Opis:
    One of the most important parameters, crucial to applications of superconductors in cryo-electrotechnique, is power loss. Measurements of losses in superconducting long sample wires require AC magnetic fields of a special geometry and appropriate high homogeneity. In the paper part of the theoretical basis for calculations and a simple design method for a race-track coil set are presented. An example of such home-made coils, with a magnetic field uniformity of about 0.2 % over the range of about 8 cm, is given. Also a simple electronic measurement system for the determination of AC magnetization loss in samples of superconducting tapes is presented.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 2; 293-304
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and analysis of the ferrite air-gapped cores for a resonant inductor
    Autorzy:
    Zheng, J.
    Wang, Ch.
    Xia, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/949922.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    three-air-gapped
    electromagnetic and thermal field
    finite element method
    resonant inductor
    Opis:
    In this paper, a three-air-gapped structure of a ferrite core for a resonant inductor is proposed. The electromagnetic and thermal field models are built using a 3D finite element method. Compared with the conventional signal-air-gapped structure of a ferrite core, the simulation and analysis results show that the proposed three-air-gapped ferrite core resonant inductor can reduce eddy-current loss and decrease temperature rise. In addition, the optimal position of air-gapped is presented.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 3; 579--589
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional computational fluid dynamics modelling of a proton exchange membrane fuel cell with a serpentine micro-channel design
    Autorzy:
    Zinko, T.
    Jaworski, Z.
    Pianko-Oprych, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/185221.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Proton Exchange Membrane Fuel Cells
    Computational Fluid Dynamics
    flow field design
    polarisation curve
    obliczeniowa dynamika płynów
    pole przepływu
    krzywa polaryzacji
    Opis:
    The aim of this paper was to demonstrate the feasibility of using a Computational Fluid Dynamics tool for the design of a novel Proton Exchange Membrane Fuel Cell and to investigate the performance of serpentine micro-channel flow fields. A three-dimensional steady state model consisting of momentum, heat, species and charge conservation equations in combination with electrochemical equations has been developed. The design of the PEMFC involved electrolyte membrane, anode and cathode catalyst layers, anode and cathode gas diffusion layers, two collectors and serpentine micro-channels of air and fuel. The distributions of mass fraction, temperature, pressure drop and gas flows through the PEMFC were studied. The current density was predicted in a wide scope of voltage. The current density – voltage curve and power characteristic of the analysed PEMFC design were obtained. A validation study showed that the developed model was able to assess the PEMFC performance.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 2; 143--154
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of Acoustic Tubes Array and Application to Measuring Acoustic Loads in Supersonic Airflow
    Autorzy:
    Wei, L.
    Li, M.
    Fu, Q.
    Fan, Y.
    Yang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/176750.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acoustic load
    acoustic tubes array
    near field measurement
    supersonic airflow
    Opis:
    In the acoustic fatigue experiment for hypersonic vehicle in simulated harsh service environment on ground, acoustic loads on the surface of test pieces of the vehicle need to be measured. However, for the normal microphones without high temperature resistance ability, the near field sound measurement cannot be achieved. In this work, on the basis of previous researches, an acoustic tubes array is designed to achieve the near field measurement of acoustic loads on the surface of the test piece in the supersonic airflow with high temperature achieved by coherent jet oxygen lance. Firstly, the process of designing this acoustic tubes array is introduced. Secondly, the equality of phase differences at the front and at the end of the tubes is stated and proved using a phase differences test with an acoustic tubes array whose design is presented in this text; therefore, the phase differences of signals acquired by microphones can be directly applied to beamforming algorithm to determine the acoustic load source. Finally, using above mentioned acoustic tubes array, measurement of acoustic load, with and without a test piece in the supersonic airflow made by the coherent jet oxygen lance, is conducted respectively, and the measurements results are analyzed.
    Źródło:
    Archives of Acoustics; 2014, 39, 3; 395-402
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rola przedmiotów projektowych w systemie kształcenia na kierunku gospodarka przestrzenna
    The Role of Planning and Design Subjects in the Education System in the Field of Spatial Economy
    Autorzy:
    Jopek, D.
    Klimczak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2031578.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    edukacja
    gospodarka przestrzenna
    przestrzeń
    planowanie
    education
    spatial economy
    space
    planning
    Opis:
    Gaczek [2003, s. 11] definiuje gospodarkę przestrzenną jako „działalność organizująca przestrzennie system społeczno–gospodarczy jednostki terytorialnej”. Wskazuje również, że działalność ta ma na celu wytworzenie racjonalnego układu przestrzennego lub jego przekształcenie, tak aby umożliwiał on efektywne i właściwe funkcjonowanie przez sieć powiązań. Powiązania te zachodzą między elementami zagospodarowania oraz zapewniają możliwości trwałego rozwoju w środowisku przyrodniczym jednostki terytorialnej”. Domański [2006, s. 14-15] wskazuje natomiast bliski związek terminu gospodarka przestrzenna z regionalistyką, której szeroki zakres problemów i metod ich rozwiązywania wymaga interdyscyplinarnej współpracy w zakresie dyscyplin pokrewnych i współdziałających, tj. m.in. urbanistyki, geografii, socjologii, demografii, geodezji, statystyki.
    The article presents the problems of education in the management of space-related activities in the process of the developing competence of spatial economy. As a part of the education process of the planning and urban design, the particular focus need to be put on the importance of using the methods and techniques that will allow to develop the spatial competence of the students. The article presents the innovative approach to planning subjects at the Cracow University of Economics.
    Źródło:
    Biuletyn Komitetu Przestrzennego Zagospodarowania Kraju PAN; 2016, 260; 130-144
    0079-3493
    Pojawia się w:
    Biuletyn Komitetu Przestrzennego Zagospodarowania Kraju PAN
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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