Articles producció científica> Química Física i Inorgànica

Detecting accelerometric nonlinearities in the international space station

  • Dades identificatives

    Identificador: PC:3169
    Autors:
    Jna. GavaldàNuria SáezX. RuizValentina Shevtsova
    Resum:
    Filiació URV: SI
  • Altres:

    Autor segons l'article: Jna. Gavaldà; Nuria Sáez; X. Ruiz; Valentina Shevtsova
    Departament: Química Física i Inorgànica
    Autor/s de la URV: GAVALDÀ MARTÍNEZ, JOSEFA; Nuria Sáez; RUIZ MARTÍ, JOSÉ JAVIER; Valentina Shevtsova
    Resum: The present work aims to study mechanical nonlinearities detected in the accelerometric records during a thermodiffusion experiment performed at the International Space Station, ISS. In that experiment the test cell was subjected to harmonic vibrations of different frequencies and amplitudes. Accelerometric data associated to the runs were downloaded from NASA PIMS website. Second order spectral analysis shows that the shaker modifies the normality of the data and introduces nonlinearities in the distribution of energy. High Order Spectral Analysis, HOSA, based on the bispectrum, bicoherence, trispectrum and tricoherence functions enabled us to study the kind of these nonlinearities. Additionally, a new method using the biphase and triphase histograms helps us to assess if quadratic and/or cubic phase coupling mechanisms are responsible for the anomalous nonlinear energy transfer detected. Finally, the RMS acceleration values are investigated to check if the vibratory limit requirements of the ISS are exceeded. This methodology is important not only in generic research of aerospace engineering but also in space sciences in order to help space researchers to characterize more globally their experiments. It is mentioned finally that HOSA techniques are not new, but never have been used in the analysis of accelerometric data coming from the ISS
    Grup de recerca: Processat Digital de Senyals en Entorns Aeroespacials i Biomèdics
    Àrees temàtiques: Física Física Physics
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0094-5765
    Identificador de l'autor: 0000-0001-7881-4192; ; 0000-0003-4020-4457;
    Data d'alta del registre: 2018-03-07
    Pàgina final: 25
    Volum de revista: 103
    Versió de l'article dipositat: info:eu-repo/semantics/submittedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0094576514002240?via%3Dihub
    Programa de finançament: altres; 2014SGR365
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.1016/j.actaastro.2014.06.025
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2014
    Pàgina inicial: 16
    Tipus de publicació: Article Artículo Article
  • Paraules clau:

    Estacions espacials
    Inèrcia (Mecànica)
    Física
    Física
    Physics
    0094-5765
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