航天器再入角和再入速度对再入终迹圈的影响  

Influences of Reentry Velocity and Reentry Angle on Reentry Footprint

作　　者：刘涛[1] 南英[1] 

机构地区：[1]南京航空航天大学航天学院,江苏南京210016

出　　处：《指挥控制与仿真》2015年第4期49-53,68,共6页Command Control & Simulation

摘　　要：主要分析了航天器再入大气层时初始点飞行状态主要参数对再入终迹圈的影响,以航天器再入终迹圈的面积作为航天器再入飞行可行着陆区,并用于预测其最大飞行航程。采用混合遗传算法对再入飞行轨迹进行优化,并给出了产生航天器最大再入终迹圈的数值计算方法,通过对再入飞行轨迹的大量数值仿真,得到不同再入条件下航天器再入终迹圈与相应再入飞行轨迹及其特性,并得到了再入速度为7800m/s下的再入角与航天器再入飞行最大航程数值关系的拟合计算公式,其结果可应用于航天器再入飞行航迹规划及制导。The influences of major parameters on reentry footprint are mainly analyzed for space vehicles caused by reentry velocity and reentry angle, the reentry footprint are regarded as the reachable area of the flight ability to predict the maximum voyage. Based on the modified genetic algorithm for flight trajectory optimization, the numerical method is developed for generating landing footprints for reentry space vehicle. Through a series of reentry flight numerical simulations, the reentry footprint for space vehicle and the characteristics of reentry footprint are obtained, the numerical relationship between the voyage and the different reentry angle are obtained for space vehicles when reentry velocity is 7800m/s, which can be used to optimize the flight trajectory planning and guidance.

关 键 词：再入初始点飞行状态 再入终迹圈 改进遗传算法 再入轨迹优化 飞行数值仿真 

分 类 号：V47[航空宇航科学与技术—飞行器设计] E911[军事]