A prediction method for a reentry vehicle self-adaptive trajectory comprises the steps that a comprehensive influence factor and lift-drag ratio correction coefficient are calculated first; revised atmospheric density is obtained through revising nominal atmospheric density according to the comprehensive influence factor in a trajectory prediction process; in the trajectory prediction process, revised lift-to-drag ratio is calculated according to the lift-drag ratio correction coefficient, and revised lift coefficient is calculated according to the revised lift-to-drag ratio; the revised atmospheric density and the revised lift coefficient are used for the trajectory prediction directly. By means of the prediction method for the reentry vehicle self-adaptive trajectory, the adaptability of the trajectory prediction method to the changes of the comprehensive influence factor and the lift-to-drag ratio is significantly enhanced, the accurate degree of the trajectory prediction is improved, the accurate degree of prediction correction guidance algorithm is improved, and the problem that under the influences of factors such as inaccurate aerodynamic parameters, uncertain atmospheric density and mass ablation, the trajectory prediction is inaccurate or even actual trajectory is inaccessible is solved.
Prediction method for reentry vehicle self-adaptive trajectory
2015-05-20
Patent
Electronic Resource
English
IPC: | B64G Raumfahrt , COSMONAUTICS |
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