Research on Reentry Trajectory Optimization Based on Landing Point Database
HE Mingyong
NAN Ying
Abstract：By simulating the reentry flight process of the aircraft under various conditions,the data relationship between the initial state and the landing point state is obtained,and the flight trajectory database is established to reversely solve the optimal re-entry trajectory.Firstly,under the condition of satisfying various constraints,the single reentry flight trajectory of the aircraft is opti-mized to obtain the optimal flight trajectory with the minimum comprehensive performance index.Secondly,different reentry flight trajectories are obtained by changing the initial reentry state conditions,and the flight trajectory database is established.Finally,the position information of the desired point is selected,and the reentry state of the desired point and the corresponding flight trajec-tory are estimated by interpolating the state data of multiple trajectories near the desired point in the database.Through simulation verification,the error between the flight trajectory estimated by this method and the optimized trajectory is less than 1％,which meets the requirements of the optimal performance index.In addition,this method has shorter optimization time than the re-optimi-zation of the reentry trajectory.
Keywords：reentry trajectory optimizationgradient algorithmtrack databaseinterpolation algorithmthermal protection system
Publication Date：2025-08-20
Online Publishing Date：2025-12-12(First online date of this platform, not the publication date of the document)
Pages：6( 69-73,99 )