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Optimal trajectories for hypervelocity flight
This thesis discusses optimal trajectories for hypervelocity flight of interest in aeroassisted orbital transfer. Both coplanar orbital transfer and noncoplanar orbital transfer are studied. For these cases, the GEO-to-LEO ...
MINIMAX OPTIMAL CONTROL IN THE REENTRY OF A SPACE GLIDER
This thesis considers the numerical solution of minimax problems of optimal control (also called Chebyshev problems) arising in the reentry of a space glider. First, a transformation technique is employed in order to convert ...
AEROASSISTED COPLANAR ORBITAL TRANSFER OF FLIGHT VEHICLES USING THE SEQUENTIAL GRADIENT-RESTORATION ALGORITHM (OPTIMIZATION, BOLZA PROBLEM, GRAZING TRAJECTORY, MINIMAX)
This thesis considers both classical and minimax problems of optimal control arising in the study of coplanar aeroassisted orbital transfer. The basic idea is to employ the hybrid combination of propulsive maneuvers in ...
Windshear estimation along the trajectory of an aircraft
The application of the sequential gradient-restoration algorithm (SGRA) to the estimation of the windshear along the trajectory of an aircraft is studied. Based on the measured trajectory data obtained from the digital ...