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    Wyświetlanie 1-4 z 4
    Tytuł:
    The Use of the Acoustic Signal to Diagnose Machines Operated Under Variable Load
    Autorzy:
    Pawlik, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/176319.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    acoustic diagnostics
    vibroacoustics
    order analysis
    Opis:
    Acoustic signal is more and more frequently used to diagnose machines operated in industrial conditions where installation of sensors is hindered. Impact of background noise seems to be the major problem as part of analysis of such signal. In most cases of industrial environments, background level is high; thus, it prevents against concluding as per standard methods that have been used in diagnostic testing. This study specifies the problem related to diagnosing machines operated under variable loads. Synchronous methods are used for diagnosing these types of machines, those include synchronisation of diagnostic signal with revolutions of the diagnosed machine. For the purpose of this study an acoustic signal was used as the diagnostic signal. Application of the synchronous method (order analysis) enables eliminating an impact of background noise derived from other sources. This study specifies application of acoustic signal to diagnose planetary gear in laboratory testing rig in order to discover damages at early stage of degradation. This method was compared with the method basing on measurement of vibrations.
    Źródło:
    Archives of Acoustics; 2020, 45, 2; 263-270
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Parameters for a Damped Oscillator Excited by a Sequence of Random Pulses
    Autorzy:
    Ozga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/177370.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    random pulses
    oscillator with damping
    vibroacoustics
    Opis:
    The paper is another step in discussion concerning the method of determining the distributions of pulses forcing vibrations of a system. Solving a stochastic problem for systems subjected to random series of pulses requires determining the distribution for a linear oscillator with damping. The goal of the study is to minimize the error issuing from the finite time interval. The applied model of investigations is supposed to answer the question how to select the parameters of a vibrating system so that the difference between the actual distribution of random pulses and that determined from the waveform is as small as possible.
    Źródło:
    Archives of Acoustics; 2014, 39, 4; 645-652
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Primary Noise Control in the Work Environment by Increasing the Quality of Bearings and Effective Mounting of Machines
    Autorzy:
    Žiaran, Stanislav
    Šooš, Ľubomír
    Chlebo, Ondrej
    Powiązania:
    https://bibliotekanauki.pl/articles/177903.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    noise control
    vibroacoustics
    vibroisolation
    human
    measures
    Opis:
    Implementation of European directives is closely related to the quality of production and the associated operational safety, maintenance of machines and mechanical systems, both mobile or stationary, in order to reduce the dynamic load (vibration and noise) on the working environment, not only during their operating state but also during their design, production, and setting of the vibration isolation components. Reducing the dynamic load of mechanical systems and their components is reflected in the working environment by reduced emissions and immissions of noise and vibration. The presented paper investigates the methods and conditions for noise and vibration control, focusing mainly on increasing the quality of rotating machine components, such as bearings by means of effective vibration isolation of the machines. The solution of this problem requires theoretical analysis and methodology for the measurement of the mechanical systems involved. The results of the vibroacoustic measurements were analysed in terms of the low frequency vibration and noise level (quality) of bearings and conditions for effective vibration isolation of the machines using vibroacoustic diagnostic method. Furthermore, the impact on the working environment was also analysed. Finally, the paper suggests some actions to be taken to effectively reduce the unwanted vibrosound energy in working places, also using recycled material as a vibration isolation element.
    Źródło:
    Archives of Acoustics; 2020, 45, 2; 253-262
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scientific Ideas Included in the Concepts of Bioacoustics, Acoustic Ecology, Ecoacoustics, Soundscape Ecology, and Vibroacoustics
    Autorzy:
    Ozga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/177583.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioacoustics
    soundscape ecology
    acoustic ecology
    ecoacoustics
    vibroacoustics
    Opis:
    The paper discusses the research areas which are placed in the modern science on the borderline between ecology and acoustics. It is explained what ideas are included in the concepts of bioacoustics, acoustic ecology, ecoacoustics, and soundscape ecology. The results obtained in these domains are compared with those received in vibroacoustic research presented at the Polish WIBROTECH conference cycle. The paper suggests an inventory of research topics connected with acoustics and ecology. In the second part of the paper the author presents the possibilities of ambisonic technology of recording and listening to sounds for the analysis in bioacoustic research.
    Źródło:
    Archives of Acoustics; 2017, 42, 3; 415-421
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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