运载火箭的飞行模态辨识技术研究
In-flight Modal Identification Technique of Launch Vehicles
马志赛 1丁千 1范霆威 1阚镭 2祁峰 2潘忠文2
作者信息
- 1. 天津大学机械工程学院,天津 300350;天津市非线性动力学与控制重点实验室,天津 300350
- 2. 北京宇航系统工程研究所,北京 100076
- 折叠
摘要
模态参数是表征运载火箭动态特性的重要指标,对姿控系统设计、动载荷设计、天地差异研究和系统优化设计等具有重要意义.燃料快速消耗和结构分离导致飞行状态下的运载火箭表现出显著时变特征,通过有限元分析或地面振动试验难以获得真实飞行状态下运载火箭的时变参数,开展飞行模态辨识前沿理论研究和关键技术攻关尤为重要.面向工程实际需求,分别发展了基于时间序列分析和动态模式分解的两类时变模态输出递推辨识方法,应用于液体火箭的遥测数据快速处理,准确辨识得到模态参数随时间的变化规律,并展望了运载火箭飞行模态辨识技术的未来应用前景.
Abstract
Modal parameters are important indicators for respresenting the dynamic characteristics of launch vehicles,and are of great significance in attitude control system design,dynamic load design,ground-to-fight difference research,and system optimization.The time-varying characteristics of launch vehicles are significant due to the rapid fuel consumption and structure separation,and in-flight modal parameters are difficult to describe by finite element analysis or ground vibration tests.Therefore,it is imperative to carry out cutting-edge theoretical research and key technological breakthroughs on the in-flight modal identification.Different output-only recursive identification methods of time-varying modal parameters are respectively proposed based on the time series analysis and dynamic mode decomposition,and subsequently applied to process the telemetry data of a liquid rocket to identify its in-flight modal parameters.Finally,future application prospects of in-flight modal identification technique of launch vehicles are presented.
关键词
运载火箭/时变模态参数/飞行模态辨识Key words
launch vehicles/time-varying modal parameters/in-flight modal identification引用本文复制引用
基金项目
国家自然科学基金(12272258)
国家自然科学基金(11802201)
战略火箭创新基金(ZH2022001)
出版年
2024
NETL
NSTL
万方数据