高超飞行器平滑再入倾侧角优化设计

针对高超声速飞行器准平衡滑翔再入问题,根据再入约束特点,分别把初始段和准平滑段的过程约束转化成为倾侧角约束,并对其交接班问题进行了讨论;在倾侧角约束范围内,设计了倾侧角文件,降低了问题的维数,提高了寻优速度;分别以最大纵程与最小总气动加热为性能指标利用罚函数处理,终端约束,将再入约束问题转化为无约束问题;采用遗传算法寻猜测值、模式搜索法求精确解的方式,提高了寻优精度。仿真结果显示,利用本文设计的倾侧角文件规划出的轨迹,能够很好的满足再入过程中的各项约束,且再入轨迹平稳,可为再入轨迹和覆盖区的研究提供参考借鉴。

Optimizationdesign of Bank Angle for Hypersonic Gliding Vehicle Smooth Reentry

In view of the hypersonic vehicle quasi-equilibrium glide reentry problem, the various constraints in the process of reentry are analyzed. Process constraints are converted to a bank angle constraint at different stages, and a bank angle file is designed based on the above described. With the performance indicators of maximum cross-range and minimum aerodynamic heating, GA combined with pattern search method is used to find the optimal solution for the reentry trajectory while the terminal constraints are dealt by using the penalty function. The simulation shows that the reentry trajectory satisfactory to the various constraints can be planned by using the designed bank angle file. The speed of the algorithm optimization is raised, and still more close to the online program. This method can be used for rapid trajectory optimization and research in the covered area.