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Acceleration levels on board the Space Station and a tethered elevator for micro and variable-gravity applicationsThis paper investigates the dynamics and acceleration levels of a new tethered system for micro and variable-gravity applications. The system consists of two platforms tethered on opposite sides to the Space Station. A fourth platform, the elevator, is placed in between the Space Station and the upper platform. Variable-g levels on board the elevator are obtained by moving this facility along the upper tether, while micro-g experiments are carried out on board the Space Station. By controlling the length of the lower tether the position of the system CM can be maintained on board the Space Station despite variations of the station's distribution of mass. The paper illustrates the mathematical model, the environmental perturbations and the control techniques which have been adopted for the simulation and control of the system dynamics. Two sets of results from two different simulation runs are shown. The first set shows the system dynamics and the acceleration spectra on board the Space Station and the elevator during station-keeping. The second set of results demonstrates the capability of the elevator to attain a preselected g-level.
Document ID
Document Type
Conference Paper
Lorenzini, E. C.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Cosmo, M.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Vetrella, S.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Moccia, A.
(Napoli, Universita Naples, Italy)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Meeting Information
Meeting: Intl. Conference on Space Tethers for Science in the Space Station Era
Location: Venice
Country: Italy
Start Date: October 4, 1987
End Date: October 8, 1987
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