Author, as appears in the article.: Dubert D; Ollé J; Jurado R; Gavaldà J; Laverón-Simavilla A; Ruiz X; Shevtsova V

Department: Química Física i Inorgànica

URV's Author/s: Dubert, Diana Cristina / Gavaldà Martínez, Josefa / JURADO CRUZ, RAFAEL / Ruiz Martí, José Javier

Keywords: Thermodiffusion Ternary mixtures Spectral entropy Soret Microgravity environment Linear correlation between iss acceleration signals Iss vibrational environment Iss acceleration signal Iss International-space-station Diffusion Dcmix experiment Benchmark

Abstract: © 2018, Springer Nature B.V. 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 (< 3 Hz) 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 to properly characterize DCMIX2/3 experiments.

Thematic Areas: Thermodynamics Physics and astronomy (miscellaneous) Physics and astronomy (all) Modeling and simulation Mechanics General physics and astronomy General engineering Engineering, multidisciplinary Engineering, aerospace Engineering (miscellaneous) Engineering (all) Engineering Engenharias iii Engenharias ii Biotecnología Applied mathematics

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 09380108

Author's mail: dianacristina.dubert@urv.cat josepxavier.ruiz@urv.cat fina.gavalda@urv.cat

Author identifier: 0000-0002-7308-5872 0000-0003-4020-4457 0000-0001-7881-4192

Record's date: 2023-02-26

Papper version: info:eu-repo/semantics/submittedVersion

Link to the original source: https://link.springer.com/article/10.1007/s12217-018-9640-7

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Microgravity Science And Technology. 30 (5): 683-697

APA: Dubert D; Ollé J; Jurado R; Gavaldà J; Laverón-Simavilla A; Ruiz X; Shevtsova V (2018). Characterization of the Accelerometric Environment of DCMIX2/3 Experiments. Microgravity Science And Technology, 30(5), 683-697. DOI: 10.1007/s12217-018-9640-7

Article's DOI: 10.1007/s12217-018-9640-7

Entity: Universitat Rovira i Virgili

Journal publication year: 2018

Publication Type: Journal Publications