Now showing items 11-20 of 33
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 identification and detection in simulated and real environments
This thesis considers windshear identification and detection problems by utilizing random process and statistical analysis techniques. A 3D windshear/turbulence model is developed, which covers a broad spectrum of windshear ...