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Wyszukujesz frazę "magneto-rheological fluid" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-4 z 4
    Tytuł:
    A semi-active control of lateral vibrations of the overhung rotor using dampers with the magneto-rheological fluid
    Autorzy:
    Michajłow, M.
    Konowrocki, R.
    Szolc, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/127741.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    overhung rotor-shaft
    lateral vibrations
    semi-active control
    optimal control theory
    wał wirnika
    drgania poprzeczne
    sterowanie półaktywne
    teoria sterowania optymalnego
    Opis:
    In the paper there is proposed an algorithm of an efficient semi-active control of steady-state periodic lateral vibrations of the overhung rotor-shaft system. This algorithm has been developed using fundamentals of the Optimal Control Theory. In the considered system the control is realized by means of the linear dampers with the magneto-rheological fluid built in the bearing housing. The computational example demonstrates possibilities of the applied approach resulting in an additional reduction of out-of-resonance and near-resonance harmonic oscillation amplitudes in comparison with an analogous passive control.
    Źródło:
    Vibrations in Physical Systems; 2016, 27; 273-280
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel internal combustion engine without crankshaft and connecting rod mechanisms
    Autorzy:
    Fijałkowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/247269.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    internal combustion engine
    mechatronic commutator
    nano-magneto-rheological fluid
    Opis:
    A novel internal combustion engine without a crankshaft and connecting rod mechanisms, which the author would like to present, is partially acting on another law of physics. The invention titled 'Nano-Magneto-Rheological Mechatronic Commutator Internal Combustion Engine', which is concisely termed the Fijalkowski engine by some, is based on a completely new propulsion engineering solution that has no analogies in the world. Thus, this paper focuses on a novel internal combustion, which may use a nano-magneto-rheological mechatronic commutator that may replace the crankshaft and connecting rod (conrod) mechanisms. This mechatronic commutator may let nano -magneto-rheological rotary ratchets oscillate in a controlled wobble while keeping the output shaft spinning smoothly; and although opposed pistons and opposed cylinders similar to those in automotive 'boxer' engines may power the Fijalkowski engine, it may also use opposed cylinders containing four pairs of two end-to-end opposed pistons for higher power densities. The nano-magneto-rheological mechatronic commutator is used for converting between one form of mechanical motion that is linear, reciprocating motion of pistons and another -- that is the rotary motion of the output shaft.
    Źródło:
    Journal of KONES; 2011, 18, 4; 91-104
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and characterization of a soft magneto-rheological miniature shock absorber for a controllable variable stiffness sole
    Autorzy:
    Grivon, D.
    Civet, Y.
    Pataky, Z.
    Perriard, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/141356.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magneto-rheological fluid
    miniaturization
    soft shock absorber
    design and characterization
    Opis:
    The proposed paper discusses the design and characterization of a soft miniature Magneto-Rheological (MR) shock absorber. In particular, the final application considered for the insertion of the designed devices is a controllable variable stiffness sole for patients with foot neuropathy. Such application imposes particularly challenging constraints in terms of miniaturization (cross-sectional area ≤ 1.5 cm2, height ≤ 25 mm) and high sustainable loads (normal loads up to 60 N and shear stresses at the foot/device interface up to 80 kPa) while ensuring moderate to low level of power consumption. Initial design considerations are done to introduce and justify the chosen novel configuration of soft shock absorber embedding a MR valve as the core control element. Successively, the dimensioning of two different MR valves typologies is discussed. In particular, for each configuration two design scenarios are evaluated and consequently two sets of valves satisfying different specifications are manufactured. The obtained prototypes result in miniature modules (external diam. ≤ 15 mm, overall height ≤ 30 mm) with low power consumption (from a minimum of 63 mW to a max. of 110 mW) and able to sustain a load up to 65 N. Finally, experimental sessions are performed to test the behaviour of the realized shock absorbers and results are presented.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 4; 547-558
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the semi-active control method for torsional vibrations in electro-mechanical systems by means of rotary actuators with a magneto-rheological fluid
    Autorzy:
    Pręgowska, A.
    Konowrocki, R.
    Szolc, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/282053.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    semi-active control
    torsional vibrations
    magneto-rheological rotary dampers
    Opis:
    The aim of this paper is to present a method of the semi-active control of torsional vibrations in a working machine drive system by means of rotary actuators with a magneto-rheological fluid. The simple open-loop control strategy is proposed for a mechanical system vibrating in steady-state operating conditions. This semi-active control approach is based on the principle of optimum viscous damping and frictional properties realized by the magneto-rheological fluid, where its respective parameters are determined by the applied control electric currents. The analysis is performed theoretically by means of structural electro-mechanical models of the considered drive system as well as experimentally using a laboratory test rig in the form of a rotor-shaft system co-operating with two asynchronous motors generating property programmed driving and retarding electro-magnetic torques.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2013, 51, 4; 979-992
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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