Journal of Guidance Control and Dynamics · 1987 · 19 citations · 4 references
EngineeringAerospace EngineeringMathematicsFlight DynamicsFlight MechanicsOptimizationAircraft ControlManeuveringManeuvering FlightOptimal ControlReentry TrajectoriesTrajectory OptimizationAtmospheric Flight Trajectory AnalysisControlsDescentNonlinear Differential-algebraic EquationsNonlinear System ModelingOptimal Control Of TrajectoriesTerminal Descent TrajectoriesTerminal Velocity
Approximations are made to the point-mass equations of motion for flight within the atmosphere. Optimal controls are formulated for a reentry vehicle to execute a maximum-terminal-velocity turn to a specified heading while executing steep, descent trajectories. A Newton scheme is used repetitively to solve a nonlinear algebraic system for two parameters in the control equations to provide the on-line guidance. Trajectory comparisons from the repetitive solution of the optimal control problem, pure numerical optimization, and simulation of sample-data guidance show good agreement, if the atmospheric model is accurate.
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