Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992asdy.conf.1253o&link_type=abstract
IN: Astrodynamics 1991; Proceedings of the AAS/AIAA Astrodynamics Conference, Durango, CO, Aug. 19-22, 1991. Pt. 2 (A92-43251 18
Astronomy and Astrophysics
Astronomy
Interplanetary Medium, Solar Planetary Interactions, Solar Sails, Spacecraft Orbits, Trajectory Control, Radiation Pressure, Solar Radiation, Three Body Problem
Scientific paper
Trajectories about the interior libration point of the sun-earth system are currently being considered to continuously monitor the interplanetary medium upstream of the earth. One of these missions may involve placing a spacecraft in orbit about this location to serve as an early warning system for geomagnetic disturbances that reach the earth about one hour after they are detected. However, due to the natural instability associated with these trajectories, control technique are required to maintain a spacecraft in a bounded region about the libration point. In this paper, the circular restricted three-body problem is generalized to include forces due to solar radiation pressure acting on a controlled solar sail. As a prelude to developing a solar sail station-keeping strategy for future libration point missions, a discussion on a various sail settings and associated orientation control functions used to generate a nominal path is presented. Furthermore, a differential corrections scheme that changes the sail angle at various times to target to certain orbit conditions is demonstrated. Effectively, this serves as an orbit control technique that can be used to fly a sail-spacecraft in a bounded region about L1.
Ocampo Cesar A.
Rosborough George W.
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