类星舰飞行器翻转着陆轨迹优化  

Flipping and Landing Trajectory Optimization of Starship-like Vehicles

作　　者：鲁鹏 李雅轩 刘新福 LU Peng;LI Yaxuan;LIU Xinfu(School of Aerospace Engineering,Beijing Institute of Technology,Beijing,100081)

机构地区：[1]北京理工大学宇航学院,北京100081

出　　处：《导弹与航天运载技术（中英文）》2024年第1期30-38,45,共10页Missiles and Space Vehicles

基　　金：国家自然科学基金(11972076)。

摘　　要：星舰是美国太空探索技术公司(SpaceX)研制的新一代可重复使用航天运输系统。该类型飞行器的着陆过程与传统航天器截然不同,具有姿态机动大、约束条件多、精度要求高的特点。首先研究了类星舰飞行器翻转着陆段的动力学模型,将发动机摆角响应引入动力学方程来抑制发动机摆角振荡问题。接着,基于凸优化方法设计了可以考虑姿态机动和典型约束条件下类星舰飞行器飞行时间自由的翻转着陆轨迹优化算法。为了提高算法的收敛性,使用虚拟控制、在目标函数中惩罚信赖域并给出了初值选取方法。最后,结合数值优化结果,分析了不同初值选取方法、发动机摆角响应、着陆发动机个数和优化目标选取对翻转着陆过程的影响。Starship is a new generation of reusable space transportation system developed by Space Exploration Technologies Corporation(SpaceX).The landing process of this type of spacecraft,which has the characteristics of large attitude maneuver,multiple constraints,and high accuracy requirements,is different from that of traditional spacecraft.The dynamics of the flipping and landing phase of the Starship-like aircraft is studied firstly,and the response of engine gimbal angle is introduced into the dynamics to suppress the oscillation of engine gimbal angle.Then,based on the convex optimization method,an optimization algorithm for the free-final-time flipping and landing trajectory of Starship-like vehicles is designed,which can consider the attitude maneuver and typical constraints.In order to improve the convergence of the algorithm,virtual control and penalized trust region are used,and a method for initial value selection is given.Finally,numerical examples are provided to analyze the influences of initial value selection method,the response of engine gimbal angle,engine number,and the selection of optimization objective functions on the flipping and landing phase.

关 键 词：类星舰飞行器 翻转 垂直着陆 轨迹优化 凸优化 

分 类 号：V448[航空宇航科学与技术—飞行器设计]