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Wyszukujesz frazę "Vibroacoustic Method" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Vibroacoustic diagnostics of transformers in a transient state with reduced influence of magnetostriction phenomenon
Autorzy:
Kornatowski, E.
Powiązania:
https://bibliotekanauki.pl/articles/97533.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
transformer
winding
Vibroacoustic Method
Spectral Subtraction Method
Opis:
In the paper a vibroacoustic method of diagnostics of the mechanical state of an active part of a transformer is presented. The analysis is performed on the signal of bank vibrations in a transient stage of work of an unloaded transformer - during the first few seconds after connecting to the power supply. The method is based on SSM algorithm (Spectral Subtraction Method) reducing the ‘disturbing’ impact of magnetostriction phenomenon on the measurement. It was concluded that using, in the process of diagnostics of an active part of a transformer unit, only the vibroacoustic method does not provide certain conclusions. Experimental research proved high usefulness of the presented V-SSM method (Vibroacoustic Spectral Subtraction Method) when accompanied by FRA method (Frequency Response Analysis) in winding defect diagnostics.
Źródło:
Computer Applications in Electrical Engineering; 2013, 11; 241-251
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection damage in bearing system of jet engine using the vibroacoustic method
Autorzy:
Żokowski, M.
Majewski, P.
Spychała, J.
Powiązania:
https://bibliotekanauki.pl/articles/970580.pdf
Data publikacji:
2017
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
jet engine
damage of bearing
vibroacoustic method
envelope method
Opis:
The article discusses typical, operational systems for monitoring vibrations of jet engines, which constitute the propulsion of combat aircraft of the Armed Forces of the Republic of Poland. After that, the paper presents the stage of installing vibration measuring sensors in the direct area of one of the jet engine bearings, which is a support system for its rotor. The article discusses results of carried out analyses of data gathered during tests of the engine in the conditions a jet engine test bed. Results of detecting damages to the bearing, using sensors built in the direct area will be presented.
Źródło:
Acta Mechanica et Automatica; 2017, 11, 3; 237-242
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Technical Condition of the Active Part of the High Power Transformer Based on Measurements and Analysis of Vibroacoustic Signals
Autorzy:
Borucki, S.
Cichoń, A.
Majchrzak, H.
Zmarzły, D.
Powiązania:
https://bibliotekanauki.pl/articles/176397.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vibration
vibroacoustic method
core
power transformer
transformer diagnostics
Opis:
This article presents the results of research connected with the development and industrial use of vibroacoustic methods for the evaluation of the technical condition of the active part of transformers. The article presents the results of the analysis of vibrations generated by the high power transformer in which a defect was found on the basis of tests of oil carried out using the chromatography tests. In order to confirm the damage of the active part of this transformer, vibroacoustic measurements were performed in three states of its operation. The measurement using the classical vibroacoustic method included the registration of vibrations at the idle speed and during the load operation of the transformer. The original diagnostic method, so-called the modified vibroacoustic method, was also used during the measurement. The analysis of signals recorded using the classical vibroacoustic method was carried out in the frequency domain by indicating the amplitude of even harmonic vibrations. However, the analysis of signals measured during the commissioning of the transformer was conducted in the time-frequency domain using the short-time Fourier transform (STFT), continuous wavelet transform (CWT), and discrete wavelet transform (DWT). On the basis of the analysis of the results obtained it was stated that the increased level of vibrations of this transformer is a consequence of the loss of rigidity of the mechanical structure of its core.
Źródło:
Archives of Acoustics; 2017, 42, 2; 313-320
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fourier transformation – an important tool in vibroacoustic diagnostics
Transformacja Fouriera – wazne narzedzie w diagnostyce wibroakustycznej
Autorzy:
Kurowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/793356.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
vibroacoustic diagnosis
numerical signal processing
Fourier transformation
numerical method
technical condition
diagnostic signal
discrete spectral distortion
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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