| 大型星载天线桁架式可折展机构的模态分析 |
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| 引用本文： | 戴宇航,蒋松,陈金宝,魏君.大型星载天线桁架式可折展机构的模态分析[J].上海航天,2019,36(1):96-100. |
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| 作者姓名： | 戴宇航 蒋松 陈金宝 魏君 |
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| 作者单位： | 南京航空航天大学航天学院;上海宇航系统工程研究所 |
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| 基金项目： | 国家自然科学基金(61773265,51675264) |
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| 摘 要： | 大型空间抛物柱面星载天线具有口径大、约束弱、刚度低、质量小等特点,其机构的空间稳定性直接决定天线的使用寿命和信息传输的可靠性。为准确获得大型空间星载天线在轨稳定性能参数,依据星载天线的高精度和长寿命的设计需求,提出一种新型抛物柱面星载天线结构形式,利用有限元仿真对该新型星载天线作模态分析,并分析相关参数。结果表明:采用Al7075材料的新型抛物柱面星载天线基频满足设计要求。同时,增加上下支杆和上下斜撑杆的截面尺寸可有效提高天线结构的固有频率。该研究为我国大型抛物柱面星载天线设计提供了理论支撑和技术参考。
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| 关 键 词： | 抛物柱面天线 桁架式可折展机构 模态分析 固有频率 |
| 收稿时间： | 2018/9/26 0:00:00 |
| 修稿时间： | 2018/10/19 0:00:00 |
Modal Analysis of Truss Deployment Mechanism for Large Satellite Antenna |
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| DAI Yuhang,JIANG Song,CHEN Jinbao and WEI Jun.Modal Analysis of Truss Deployment Mechanism for Large Satellite Antenna[J].Aerospace Shanghai,2019,36(1):96-100. |
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| Authors: | DAI Yuhang JIANG Song CHEN Jinbao and WEI Jun |
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| Institution: | School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China,Shanghai Aerospace Engineering Research Institute, Shanghai 201109, China,School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China and School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China |
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| Abstract: | The large space parabolic cylindrical satellite antenna is characterized by large diameter, weak constraint, low stiffness and small mass. The space stability of its mechanism directly determines the service life of the antenna and the reliability of information communication. To obtain the on-orbit stability performance of the large satellite antenna, a new parabolic cylindrical satellite antenna structure is proposed in this paper according to design requirements on high precision and long life of the satellite antenna. Modal analysis of the new satellite antenna is carried out by finite element simulation and related parameters are studied. The results show that the minimal frequency of the new parabolic cylindrical satellite antenna using Al7075 material meets design requirements. Meanwhile, the natural frequency of the antenna structure can be effectively improved by increasing cross section sizes of upper and lower support bars as well as upper and lower inclined support bars. The above research provides theoretical support and technical reference for the design of large-scale parabolic cylindrical satellite antennas in China. |
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| Keywords: | parabolic cylindrical antenna truss deployment mechanism modal analysis natural frequency |
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