A previous study on the design of a tether sling has suggested that a facilitycan only be located at the poles of a moon or asteroid in order to align the angularmomentum vectors of the moon and tether. This paper analyzes theout-of-plane motion induced from rotation of the body on which the facility isstationed. While significant out-of-plane oscillations are found in the open-loopbehavior, the motion stabilizes about some finite amplitude. The mechanismfor this stabilization is considered and the out-of-plane oscillation amplitude ischaracterized with respect to system parameters. Further stabilization of thesystem is shown to be possible by modulating the tether length, maintainingthe reusable nature of the system.
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