Author, as appears in the article.: Dubert D., Marín-Genescà M., Simón M., Gavaldà J., Ruiz X.

Department: Química Física i Inorgànica

URV's Author/s: Dubert, Diana Cristina / Gavaldà Martínez, Josefa / Marín Genescà, Marc / Ruiz Martí, José Javier

Keywords: Soret Sen technique Rms warning map Reboosting maneuvers Nonlinearities of the iss acceleration signals Microgravity environment Ividil Iss vibrational environment International-space-station Experiment onboard Dcmix

Abstract: The accelerometric environment of IVIDIL and DCMIX experiments were successively monitored not only to identify the main disturbances that could affect the experiments but as well to ensure the correct interpretation of the experimental results. To do so, the conventional techniques used by NASA have been complemented by new tools developed and adapted to help the surveillance of the runs. A summary of these main new techniques is presented further. To show the potentiality of all these techniques, moderate and strong disturbance episodes such as berthings, dockings and reboostings were analyzed by using acceleration signals that came from three different sensors located in the Destiny, Columbus and JEM/Kibo modules, respectively. The first technique proposed is based on the Shannon entropy concept in both time (TEN) and frequency (SEN) domains. It has been found, that SEN technique is a fast and easy tool to detect the different disturbances registered throughout the experiments. The second technique suggested by the authors is based on the one-third octave frequency band RMS values and is called RMS warning map. It is a visual tool which was demonstrated to be very efficient in detecting the range of the frequencies that surpasses the ISS limits requirements, especially when a sudden disturbance occurs. Finally, in order to identify nonlinearities in the frequency domain within a signal, bispectrum and trispectrum functions have been applied. Quadratic and cubic phase couplings have been detected with these techniques only between high frequencies and especially for the signals coming from JEM/Kibo module.

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

ISSN: 09380108

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

Author identifier: 0000-0002-7308-5872 0000-0002-7204-4526 0000-0003-4020-4457 0000-0001-7881-4192

Record's date: 2023-02-22

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

Link to the original source: https://link.springer.com/article/10.1007/s12217-019-09739-1

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

Papper original source: Microgravity Science And Technology. 31 (5): 673-683

APA: Dubert D., Marín-Genescà M., Simón M., Gavaldà J., Ruiz X. (2019). Complementary Techniques for the Accelerometric Environment Characterization of Thermodiffusion Experiments on the ISS. Microgravity Science And Technology, 31(5), 673-683. DOI: 10.1007/s12217-019-09739-1

Article's DOI: 10.1007/s12217-019-09739-1

Entity: Universitat Rovira i Virgili

Journal publication year: 2019

Publication Type: Journal Publications