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A novel facility for reduced-gravity testing: A setup for studying low-velocity collisions into granular surfaces

Sunday, Cecily and Murdoch, Naomi and Cherrier, Olivier and Morales Serrano, Sara and Valeria Nardi, Claudia and Janin, Tristan and Avila Martinez, Iris and Gourinat, Yves and Mimoun, David A novel facility for reduced-gravity testing: A setup for studying low-velocity collisions into granular surfaces. (2016) Review of Scientific Instruments, 87 (8). 084504-084515. ISSN 0034-6748

(Document in English)

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Official URL: http://dx.doi.org/10.1063/1.4961575


This work presents an experimental design for studying low-velocity collisions into granular surfaces in low-gravity. In the experiment apparatus, reduced-gravity is simulated by releasing a free-falling projectile into a surface container with a downward acceleration less than that of Earth’s gravity. The acceleration of the surface is controlled through the use of an Atwood machine, or a system of pulleys and counterweights. The starting height of the surface container and the initial separation distance between the projectile and surface are variable and chosen to accommodate collision velocities up to 20 cm/s and effective accelerations of ∼0.1 to 1.0 m/s2. Accelerometers, placed on the surface container and inside the projectile, provide acceleration data, while high-speed cameras capture the collision and act as secondary data sources. The experiment is built into an existing 5.5 m drop tower frame and requires the custom design of all components, including the projectile, surface sample container, release mechanism, and deceleration system. Data from calibration tests verify the efficiency of the experiment’s deceleration system and provide a quantitative understanding of the performance of the Atwood system.

Item Type:Article
HAL Id:hal-01829722
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > National Aeronautics and Space Administration - NASA (USA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > California Institute of Technology - Caltech (USA)
Laboratory name:
Deposited On:20 Dec 2016 12:31

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