吸气式组合动力飞行器爬升段最优弹道特性研究  

Study of ascent optimal trajectory characteristics of air-breathing combined power vehicles

作　　者：勾致晴 杨良[1,2] GOU Zhiqing;YANG Liang(School of Astronautics,Beihang University,Beijing 100191,China;Key Laboratory of Spacecraft Design Optimization and Dynamic Simulation Technologies,Ministry of Education,Beijing 100191,China)

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]航天器设计优化与动态模拟技术教育部重点实验室,北京100191

出　　处：《飞行力学》2024年第5期10-14,共5页Flight Dynamics

摘　　要：针对吸气式组合动力高超声速飞行器爬升段最优弹道特性开展研究。首先,构建了飞行器动力学模型及考虑能量最优的爬升段优化模型,优化模型以迎角变化率为控制量,可满足特定终端迎角需求。然后,采用Radau伪谱法对不同推力条件下的爬升弹道进行优化,仿真得到不同推阻匹配环境下的最优弹道。最后,对弹道特性进行深入分析并验证了弹道的最优性。研究表明,在不同推力条件下爬升段弹道呈现出规律性的周期不同的振荡特性。研究结果可为吸气式组合动力飞行器爬升段制导律设计提供参考。A research is carried out on the ascent optimal trajectory characteristics of the air-breath-ing combined power hypersonic vehicle.Firstly,the vehicle dynamics model was established along with the ascent trajectory optimization model with energy optimization considered.With the rate of angle of attack change chosen as the control input,the optimization model satisfied specific terminal requirements of angle of attack.Then,the ascent trajectory was optimized under different thrust con-ditions by using Radau pseudo spectral method,the optimal trajectory was obtained in different push-drag matching environment through simulation.Finally,in-depth analysis for trajectory charac-teristics was conducted and the optimality of the trajectory was verified.The results show that ascent trajectory presents regular oscillations with varying periods under different thrust conditions.The re-search results can provide a reference for the design of guidance law for the ascent trajectory of air-breathing combined power vehicles.

关 键 词：组合动力飞行器 爬升段弹道优化 Radau伪谱法 弹道特性分析 

分 类 号：V236[航空宇航科学与技术—航空宇航推进理论与工程] V438