基于优化剖面的再入飞行器最小射程轨迹设计

摘要

A new method of near-space gliding vehicle at quasi equilibrium gliding with the design of minimum range is proposed. Because of the interconnection between longitudinal and lateral motion, the design of trajectory with minimum range is challenging and necessary. The angle-of-attack and the bank angle as control variables are used to regulate energy and to shorten range. The angle-of-attack profile is ensured by the relation of range and lift-to-drag ratio at quasi equilibrium gliding,and the optimized variable of flight profile is confirmed by the relation of range and drag acceleration to energy. The secure boundary for flight corridor is built by multi-restrictions in flight. The D-e profile is optimized for minimum range in corridor. Besides,the optimized D-e profile is tracked to prove the designed trajectory with minimum range is feasible.%文章对于再入滑翔式飞行器在拟平衡滑翔条件下最小射程的问题提出一种新的研究方式。由于纵向侧向运动状态相耦合，小射程的航迹规划具有很大挑战性和工程需求。以攻角和倾侧角为调节弹道能量、减小射程的控制量，通过研究拟平衡滑翔情况下射程与升阻比的关系确定攻角剖面，射程与阻力加速度及能量的关系确定飞行剖面的优化变量。以飞行过程所受的多约束建立安全可行的飞行走廊上下边界，在走廊内对D-e剖面进行最小射程为目标的优化。并在此基础上，对优化后的D-e剖面进行跟踪，以证明规划的最小射程弹道的可实现性。