Fueloptimal trajectories of aeroassisted orbital transfer with plane change
Abstract
The problem of minimization of fuel consumption during the atmospheric portion of an aeroassisted, orbital transfer with plane change is addressed. The complete mission has required three characteristic velocities, a deorbit impulse at high earth orbit (HEO), a boost impulse at the atmospheric exit, and a reorbit impulse at low earth orbit (LEO). A performance index has been formulated as the sum of these three impulses. Application of optimal control principles has led to a nonlinear, twopoint, boundary value problem which was solved by using a multiple shooting algorithm. The strategy for the atmospheric portion of the minimumfuel transfer is to start initially with the maximum positive lift in order to recover from the downward plunge, and then to fly with a gradually decreasing lift such that the vehicle skips out of the atmosphere with a flight path angle near zero degrees.
 Publication:

Progress Report
 Pub Date:
 June 1989
 Bibcode:
 1989odu..rept.....N
 Keywords:

 Aeroassist;
 Flight Paths;
 Fuel Consumption;
 Optimal Control;
 Orbit Transfer Vehicles;
 Trajectories;
 Algorithms;
 Boundary Value Problems;
 Earth Orbits;
 Lift;
 Velocity;
 Astrodynamics