Dynamical, electrical and thermal coupling in a new class of electrodynamic tethered satellites

Lorenzini, Enrico C. and Estes, Robert D. and Cosmo, M. L. and Pelaez Alvarez, Jesus (1999). Dynamical, electrical and thermal coupling in a new class of electrodynamic tethered satellites. In: "AAS/AIAA Spaceflight Mechanics Meeting 1999", 7-10 Feb 1999, Breckenridge, Colorado, Estados Unidos. ISBN 978-0-87703-458-2. pp. 1333-1344.

Description

Title: Dynamical, electrical and thermal coupling in a new class of electrodynamic tethered satellites
Author/s:
  • Lorenzini, Enrico C.
  • Estes, Robert D.
  • Cosmo, M. L.
  • Pelaez Alvarez, Jesus
Item Type: Presentation at Congress or Conference (Article)
Event Title: AAS/AIAA Spaceflight Mechanics Meeting 1999
Event Dates: 7-10 Feb 1999
Event Location: Breckenridge, Colorado, Estados Unidos
Title of Book: Advances in the Astronautical Sciences Series
Date: 1999
ISBN: 978-0-87703-458-2
Volume: 102
Subjects:
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A new class of electrodynamic tethers have been recently introduced which provide comparatively high tether currents with relatively short and light tethers. These space systems make use of a bare tether (anode) to collect electrons from the ionosphere rather than the less efficient, conductive, large spherical termination flown in the past. This new technology, which is suitable for propellantless transportation in the ionosphere, will be demonstrated in August 2000 when the Propulsive Small Expendable Deployment System (ProSEDS) attempts the deorbit of a Delta second stage by using electrodynamic forces. This class of space systems exhibits a strong coupling among the dynamical, electrical, and thermal responses that must be analyzed with computer codes that model the tether continuum dynamics, electrodynamics, and thermal behavior in an integrated manner. After introducing briefly the physics of bare tethers and electron collection from the ionosphere, the paper describes the models adopted to simulate a bare-tether system. Then, it discusses simulation results for selected cases, pertinent to ProSEDS, which show the inter-dependencies among the system parameters. Specifically, the paper shows that key electrical, thermal, and dynamic parameters can strongly affect the decay rate (the most relevant performance index for the system under analysis) and also the system stability. An appropriate choice of system parameters can produce a sustainable electrodynamic drag force capable of increasing, by more than an order of magnitude, the natural decay rate of the Delta stage with a tether mass of only 12 kg and a stabilizing mass of 20 kg.

More information

Item ID: 40058
DC Identifier: http://oa.upm.es/40058/
OAI Identifier: oai:oa.upm.es:40058
Official URL: http://www.space-flight.org/AAS_meetings/1999_winter/1999_winter.html
Deposited by: Memoria Investigacion
Deposited on: 05 Dec 2016 09:36
Last Modified: 05 Dec 2016 09:36
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