摘要
针对星载可展天线在大口径、轻量化和高精度的发展需求,提出并设计一种展开口径为11 m×52 m大型星载抛物柱面可展天线支撑机构。根据机构组成特点,建立空间几何模型和有限元模型,基于Lanczos模态分析理论对其进行模态分析,并系统评估杆件尺寸和材料对固有频率的影响。同时,通过分析计算单位面积质量比和焦比,对可展天线支撑机构进行量化性能评估。研究结果表明:杆件尺寸和支撑材料是影响天线支撑机构动态特性的关键因素,该机构在确保结构刚度的前提下,实现了轻量化设计,并具备高指向精度。
In response to the development requirements of large-aperture,lightweight,and high-precision spaceborne deployable antennas,a support mechanism for large parabolic cylindrical spaceborne deployable antennas with a deployed aperture of 11 m×52 m is proposed and designed.Based on the characteristics of the mechanism composition,a spatial geometric model and a finite element model are established.A modal analysis is conducted on the mechanism by means of the Lanczos modal analysis theory,and the effects of the member size and material on the natural frequency are systematically evaluated.Additionally,the performance of the deployable antenna support mechanism is quantitatively evaluated by analyzing and calculating the mass-to-area ratio and f-number.The results indicate that the member size and support material are key factors affecting the dynamic characteristics of the antenna support mechanism.While ensuring the structural stiffness,the mechanism achieves lightweight design and possesses high pointing accuracy.
作者
傅鳞涵
陈晓峰
陈金宝
陈传志
郑光
FU Linhan;CHEN Xiaofeng;CHEN Jinbao;CHEN Chuanzhi;ZHENG Guang(National Key Laboratory of Aerospace Mechanism,College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China;Aerospace System Engineering Shanghai,Shanghai 201109,China;Key Laboratory of Impact and Safety Engineering,Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,Zhejiang,China)
出处
《上海航天(中英文)》
2025年第3期42-51,共10页
Aerospace Shanghai(Chinese&English)
基金
国家自然科学基金资助项目(52275113)
上海航天科技创新基金资助项目(SAST2021-017)。
关键词
抛物柱面天线
支撑机构设计
动力学分析
固有频率
参数敏感度分析
parabolic cylindrical antenna
support mechanism design
dynamic analysis
natural frequency
parameter sensitivity analysis
