基于平衡滑翔的升力再入攻角设计分析及应用

针对面对称中高升阻比飞行器再入攻角的优化问题，从工程角度系统分析了升力再入攻角优化问题的多种约束，基于平衡滑翔条件结合失速攻角、初始再入攻角和平衡滑翔攻角等，得到了再入段飞行的攻角设计空间，并给出了再入攻角剖面设计的具体可行方法。所提出的设计方案可用于快速选定满足各种过程约束的速度-攻角剖面；将该攻角设计方法应用于覆盖区优化问题，在继承已有方法的快速求解速度下，仿真结果及对比表明所规划的攻角剖面具有与直接法相似的最优性。

Angle of Attack Operation Zone Analysis and Application Based onEquilibrium Glide Condition for Lifting Reentry

Based on equilibrium glide condition, angle of attack optimization and design for surface symmetric reentry vehicle with medium to high L/D ratio is studied. Systematic analyses for path constraints during reentry flight are carried out in an engineering perspective. Then angle of attack operation zone is obtained by investigating the stall angle of attack, initial descent angle of attack and equilibrium glide angle of attack. A feasible design method is also given for angle of attack profile. The proposed method works well for angle of attack profile generation in the preliminary design phase of lifting entry vehicles, and all the path constraints have been properly satisfied. The angle of attack design method is also applied for footprint optimization problem, and simulation results show that the designed angle of attack profile has almost the same optimality compared with some direct method.