Optimal trajectories for the aeroassisted flight experiment
Abstract
The optimal trajectories of the aeroassisted flight experiment (AFE) spacecraft are analyzed in a threedimensional space using the full system of six ODEs describing the atmospheric pass. The optimal trajectories are computed for two possible transfers: indirect ascent to a 178 NM perigee via a 197 NM apogee and direct ascent to a 178 NM apogee. For each transfer, two cases are investigated: (1) the bank angle is continuously variable, and (2) the trajectory is divided into segments along which the bank angle is constant. It is shown that the optimal trajectories for both cases coalesce into a two subarc trajectory, with the bank angle constant in each subarc. It is also shown that, during the atmospheric pass, the peak values of the changes of the orbital inclination and the longitude of the ascending node are nearly zero.
 Publication:

Malaga International Astronautical Federation Congress
 Pub Date:
 October 1989
 Bibcode:
 1989mala.iafcZ....M
 Keywords:

 Aeroassist;
 Orbital Maneuvers;
 Spaceborne Experiments;
 Trajectory Optimization;
 Control Theory;
 Geosynchronous Orbits;
 Optimal Control;
 Transfer Orbits;
 Astrodynamics