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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 influence of aerodynamic characteristics of spacecraft on its reentry flight is studied. The range of reentry spacecraft and the reentry trajectory of spacecraft are taken as the characteristics of reentry flight ability to predict its maximum range. Based on the optimization of reentry flight trajectory based on genetic algorithm, a numerical algorithm of spacecraft reentry trajectory is proposed. By simulation of reentry flight trajectory, simulation results of spacecraft reentry trajectory under different maximum lift-drag ratios . The numerical results of the re-entry track circle are fitted and analyzed to obtain the numerical relationship between the maximum lift-drag ratio and the maximum range of spacecraft reentry flight and the prediction of spacecraft reentry range.