Author, as appears in the article.: Dubert,D.; Ollé, Judit; Jurado, R.; Gavaldà, Jna.; Laverón-Simavilla, Ana; Ruiz, X.; Shevtsova, Valentina
Department: Química Física i Inorgànica
URV's Author/s: DUBERT , DIANA CRISTINA; Ollé, Judit; JURADO CRUZ, RAFAEL; GAVALDÀ MARTÍNEZ, JOSEFA; Laverón-Simavilla, Ana; RUIZ MARTÍ, JOSÉ JAVIER; Shevtsova, Valentina
Abstract: A comparative analysis of the vibratory environment of the DCMIX2/3 thermodiffusion
experiments is presented here by using acceleration signals coming from different
sensors placed in the Destiny, Columbus and Kibo modules. The es03 sensor, nearest
to the experimental device and located inside the Glovebox (Destiny module) has been
defined as reference. Data were downloaded from the NASA PIMS website paying
special attention to the runs coinciding with disturbances such as dockings or
extravehicular activities (EVAs) as they could particularly affect the International Space
Station (ISS) microgravity levels.
The analyses have been made minute by minute for the three acceleration
components by using the Frequency Factor Index (FFI), Spectral Entropy (SEN) and
Root Mean Square (RMS) values evaluated over one-third-octave frequency bands.
Spearman's rank correlation coefficient and the coherence function have been used to
investigate the degree of linear correlation between the reference signal and the other
ones.
SEN evolution showed different patterns compared to the reference. Also, RMS values
surpassing the ISS microgravity limits were detected in all sensors, mainly at low
frequency bands (<10 Hz) and prevailing on zA direction. However the sensors
located in the Destiny module better accomplished the ISS vibratory limits
requirements. Finally, some degree of linear correlation at structural frequencies (< 3Hz) has also been detected.
Overall, the sensors placed in the Destiny, Columbus and Kibo modules presented
different vibratory characteristics and, despite they offer valuable information of the
whole environment, may not be sufficient properly characterize DCMIX2/3
experiments.
Research group: Processat Digital de Senyals en Entorns Aeroespacials i Biomèdics
Thematic Areas: Physics Física Física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0938-0108
Author identifier: 0000-0002-7308-5872; ; 0000-0003-1737-0019; 0000-0001-7881-4192; ; 0000-0003-4020-4457;
Record's date: 2018-10-09
Last page: 697
Journal volume: 30
Papper version: info:eu-repo/semantics/submittedVersion
Funding program: plan; ESETDIF-CEVISS; ESP2017-83544-C3-3-P(MCIU/CEDER) plan; MVI-DCMIX/ISS; ESP2014-53603-P(MCIU/CEDER)
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2018
First page: 683
Publication Type: Article Artículo Article
Repositori URV