Torsional balloon flight line oscillations: Comparison of modelling to flight data

Aubin, Francois; Bayman, Benjamin; Hanany, Shaul; Franco, Hugo; Marsh, Justin; Didier, Joy; Miller, Amber D.

doi:10.1016/j.asr.2017.05.003

Title: Torsional balloon flight line oscillations: Comparison of modelling to flight data

Abstract

During the EBEX2013 long duration flight the payload was free to rotate in azimuth. The observed azimuth motion consisted of a superposition of full rotations with a period of 10—30 min and oscillatory motion with an amplitude of tens of degrees, average period of 79 s, and period dispersion of 12 s. We interpret the full rotations as induced by slow rotations of the balloon and the shorter period oscillatory motion as due to torsional oscillations of the flight line. We derive the torsional stiffness of the flight line using the bifilar pendulum model and apply it to the flight line of the EBEX2013 payload. We find a torsional spring constant of 36 kg m²/s² corresponding to a period of 58 s. Here, we conclude that the bifilar model, which accounts for the geometry of the flight line but neglects all material properties, predicts a stiffness and period that are 45% larger and 25% shorter than those observed. It is useful to have a simple, easy to use, coarse approximation for the torsional constant of the flight line.

Authors:

Aubin, Francois ^[1]; Bayman, Benjamin ^[1]; Hanany, Shaul ^[1]; Franco, Hugo ^[2]; Marsh, Justin ^[2]; Didier, Joy ^[3]; Miller, Amber D. ^[3]

Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
Columbia Scientific Balloon Facility, Palestine, TX (United States)
Columbia Univ., New York, NY (United States). Physics Dept.

Publication Date:: Wed May 10 00:00:00 EDT 2017

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Org.:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

OSTI Identifier:: 1462045

Resource Type:: Accepted Manuscript

Journal Name:: Advances in Space Research

Additional Journal Information:: Journal Volume: 60; Journal Issue: 3; Journal ID: ISSN 0273-1177

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Balloons; Gondola motion; Bifilar pendulum

Citation Formats


                    Aubin, Francois, Bayman, Benjamin, Hanany, Shaul, Franco, Hugo, Marsh, Justin, Didier, Joy, and Miller, Amber D. Torsional balloon flight line oscillations: Comparison of modelling to flight data.  United States: N. p., 2017. 
Web.  doi:10.1016/j.asr.2017.05.003.

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                    Aubin, Francois, Bayman, Benjamin, Hanany, Shaul, Franco, Hugo, Marsh, Justin, Didier, Joy, & Miller, Amber D. Torsional balloon flight line oscillations: Comparison of modelling to flight data.  United States.  https://doi.org/10.1016/j.asr.2017.05.003

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                    Aubin, Francois, Bayman, Benjamin, Hanany, Shaul, Franco, Hugo, Marsh, Justin, Didier, Joy, and Miller, Amber D. Wed .  
"Torsional balloon flight line oscillations: Comparison of modelling to flight data".  United States.  https://doi.org/10.1016/j.asr.2017.05.003.  https://www.osti.gov/servlets/purl/1462045.

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@article{osti_1462045,

  title        = {Torsional balloon flight line oscillations: Comparison of modelling to flight data},

  author       = {Aubin, Francois and Bayman, Benjamin and Hanany, Shaul and Franco, Hugo and Marsh, Justin and Didier, Joy and Miller, Amber D.},

  abstractNote = {During the EBEX2013 long duration flight the payload was free to rotate in azimuth. The observed azimuth motion consisted of a superposition of full rotations with a period of 10—30 min and oscillatory motion with an amplitude of tens of degrees, average period of 79 s, and period dispersion of 12 s. We interpret the full rotations as induced by slow rotations of the balloon and the shorter period oscillatory motion as due to torsional oscillations of the flight line. We derive the torsional stiffness of the flight line using the bifilar pendulum model and apply it to the flight line of the EBEX2013 payload. We find a torsional spring constant of 36 kg m2/s2 corresponding to a period of 58 s. Here, we conclude that the bifilar model, which accounts for the geometry of the flight line but neglects all material properties, predicts a stiffness and period that are 45% larger and 25% shorter than those observed. It is useful to have a simple, easy to use, coarse approximation for the torsional constant of the flight line.},

  doi          = {10.1016/j.asr.2017.05.003},

  journal      = {Advances in Space Research},

  number       = 3,

  volume       = 60,

  place        = {United States},

  year         = {Wed May 10 00:00:00 EDT 2017},

  month        = {Wed May 10 00:00:00 EDT 2017}

}

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Works referenced in this record:

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Dvorkin, Yona; Paldor, Nathan; Basdevant, Claude
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Aubin, François; Aboobaker, Asad M.; Bao, Chaoyun
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A high-resolution pointing system for fast scanning platforms: The EBEX example
conference, March 2015

Didier, Joy; Chapman, Daniel; Aboobaker, Asad M.
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journal, February 1993

Ducarteron, J. P.; Treilhou, J. P.
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Reconstructing balloon trajectories in the tropical stratosphere with a hybrid model using analysed fields
journal, April 2001

Dvorkin, Yona; Paldor, Nathan; Basdevant, Claude
Quarterly Journal of the Royal Meteorological Society, Vol. 127, Issue 573
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journal, January 2009

Morani, Gianfranco; Palumbo, Roberto; Cuciniello, Giovanni
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Payload motions detected by balloon-borne fluxgate-type magnetometers
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Title: Torsional balloon flight line oscillations: Comparison of modelling to flight data

Abstract

Citation Formats

Reconstructing balloon trajectories in the tropical stratosphere with a hybrid model using analysed fields journal, April 2001

Uncertainties in the measurement of the atmospheric velocity due to balloon-gondola pendulum-like motions journal, February 2011

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Method for Prediction and Optimization of a Stratospheric Balloon Ascent Trajectory journal, January 2009

Bifilar Pendulum—An Experimental Study for the Advanced Laboratory journal, July 1965

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journal, February 2011

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journal, February 1993

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