摘要
研究了航天器气动特性对其再入飞行的影响,以航天器再入终迹圈范围作为再入飞行能力的特征来预测其最大航程。基于遗传算法的再入飞行轨迹优化,提出了航天器再入终迹圈的数值算法;通过对再入飞行轨迹的数值仿真,得到不同最大升阻比条件下航天器再入终迹圈仿真结果。对再入终迹圈数值结果进行拟合分析,得到最大升阻比与航天器再入飞行最大航程的数值关系,实现了航天器再入航程的预测。
The influences of reentry flight are researched for space vehicles caused by the different aerodynamic shapes,the reentry footprint are regarded as the characteristic of the flight ability to predict the voyage. Based on the genetic algorithm for flight trajectory optimization,the optimization algorithm of the reentry footprint is proposed,and the numerical simulation results of reentry footprints are obtained for space vehicles with different lift-to-drag ratios,considering all kinds of constraint conditions. And then the obtained numerical simulation results are analysed to get the numerical relationship between the voyage and the lift-to-drag ratios,which achieves the goal of voyage prediction. And the reentry flights are also analysed to get the influences on the characteristics of reentry flight trajectories and the best aerodynamic shape for the given flight mission.
出处
《飞行力学》
CSCD
北大核心
2013年第6期545-548,552,共5页
Flight Dynamics
关键词
再入航天器
遗传算法
再入终迹圈
升阻比
数值仿真
reentry space vehicle
genetic algorithm
reentry footprint
lift-to-drag ratio
numerical simulation
