Optimal reentry trajectories of a lifting vehicle

Computer Science – Numerical Analysis

Scientific paper

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Lifting Reentry Vehicles, Reentry Trajectories, Spacecraft Maneuvers, Trajectory Optimization, Atmospheric Entry, Equations Of Motion, Flight Mechanics, Numerical Analysis, Optimal Control, Optimization, Planetary Atmospheres, Space Shuttles

Scientific paper

The success of future permanent space stations depends on the development of a space shuttle vehicle having aerodynamic maneuvering capability. The optimum maneuver of such a vehicle reentering a spherical, stationary, and locally exponential planetary atmosphere is investigated. A set of dimensionless variables called the modified Chapman's variables and a rescaled lift-drag polar to derive the dimensionless equations of motion for flight analysis are introduced. For planar flight, two main types of optimum maneuver, the pull-up type and the gliding type, are investigated at three different altitudes, low, moderate, and very high. For three-dimensional flight, the procedure to solve the optimum trajectory for maximum cross range is discussed.

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