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    Wyświetlanie 1-4 z 4
    Tytuł:
    Experimental investigation of an automotive magnetorheological shock absorber
    Autorzy:
    Jastrzębski, Ł.
    Sapiński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/387105.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    MR shock absorber
    vibration
    current response
    force response
    dissipated energy
    Opis:
    The study summarises the experimental examination of an automotive magnetorheological (MR) shock absorber under electrical and mechanical excitations, investigates its current and force responses and the energy dissipation in the system. The aim of experiments was to acquire measurement data that allows in next step of the research program to engineer an energy harvesting device for the absorber. The work covers basic technical data of the absorber, description of the experimental set-up, scenario of testing program and test results of the device. Of particular importance is the influence the operating current, piston displacement amplitude and piston velocity have on the absorber’s response.
    Źródło:
    Acta Mechanica et Automatica; 2017, 11, 4; 253-259
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Frequency Response Testing of Zero-Sequence Current Transformers for Mining Ground Fault Protection Relays
    Autorzy:
    Kuliński, Krzysztof
    Heyduk, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/1844476.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    zero-sequence current transformers
    ground-fault protection relays
    frequency response
    Opis:
    In Polish coal mining, medium voltage power distribution networks operate with an insulated neutral point. Zero-sequence current transformers are the basic sensors that generate input signals for earth-fault protection relays. In the literature, the problem of frequency response analysis of various types of current transformers has been examined many times, e.g. [1] [2], but not for zero-sequence current transformers so far. As part of the work, two types of zero-sequence current transformers in the range from 0.1 Hz to 100 kHz were tested. Both the change of the current ratio and the angular shift between the transformer secondary current and the total primary current were analyzed.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 4; 701--705
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tilt-shift eddy current probe impact on information value of response signal
    Autorzy:
    Chudacik, V.
    Smetana, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/140578.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    eddy current testing
    eddy current probe
    response signals
    tilt-shift probe
    Opis:
    This article deals with the possibility for increasing of the informational value of a response signal using tilt-shift eddy current probe. Numerical simulations based on the FEM method using the OPERA 3D software as well as gained experimental results are presented. The simulated cracks are evaluated at the selected eddy current probe tilts and shifts with respect to conductive plate to obtain additional data needed for its evaluation and localization. Obtained simulation results are compared and discussed with the experimental results.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 1; 133-140
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transcranial direct current stimulation as a new method for changing the accommodative response of the eye
    Autorzy:
    Wendel, M.
    Burdziński, G.
    Michalak, K. P.
    Przekoracka-Krawczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/173903.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    transcranial direct current stimulation
    tDCS
    accommodative response
    visual training
    visual cortex
    Opis:
    The aim of the present study was to test if the exposure to transcranial direct current stimulation (tDCS) would change the excitability of the visual cortex and influence an accommodative response of the ocular lens. Twenty four subjects were divided into two groups: real-stimulation of the occipital cortex in which participants were exposed to real stimulation (1 mA for 12 min), and sham in which subjects were tested with placebo stimulation. The results showed that tDCS might indeed influence accommodative response. The strongest and most evident effect was observed when a 3.0 D accommodative stimulus was used: anodal tDCS increased but cathodal tDCS – decreased the accommodative response. The second finding was that the effect of stimulation was dependent on the examined eye. The right eye with slightly lower visual acuity and weaker accommodative response in pre-test, responded more strongly than the left eye. The short-time tDCS might modulate excitability of the neurons in visual cortex and eye sensitivity, reflected in the change of accommodative response. The tDCS method may be considered a technique that could reinforce conventional active visual training to improve accommodative functions.
    Źródło:
    Optica Applicata; 2017, 47, 4; 499-510
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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