| 引用本文: | 朱仕尧,雷勇军.基于星架系统结构参数的卫星载荷减振方法.[J].国防科技大学学报,2014,36(2):41-46.[点击复制] |
| ZHU Shiyao,LEI Yongjun.Vibration reduction of payloads on spacecraft based on structure parameters of spacecraft-bracket system[J].Journal of National University of Defense Technology,2014,36(2):41-46[点击复制] |
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| 基于星架系统结构参数的卫星载荷减振方法 |
| 朱仕尧, 雷勇军 |
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(国防科技大学 航天科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 卫星工程中广泛采用的有效载荷支架结构可能会与卫星主体结构发生动力耦合，进而造成有效载荷响应显著放大。进一步将有效载荷支架与卫星主体结构考虑为一个整体系统（称为星架系统）。采用有限元方法建立某型卫星系统级动力学分析模型，从中提取结构参数建立集中参数模型，并针对结构参数进行单变量影响分析。结果表明：所建集中参数模型能够反映支架结构与卫星主体结构之间动力耦合规律，载荷响应对两者频率参数的敏感程度远高于其阻尼和质量参数，卫星结构设计阶段应重点考量主体结构和支架结构频率关系以优化卫星载荷的动力学环境。 |
| 关键词: 减振设计 载荷支架 卫星主体结构 集中参数模型 灵敏度分析 |
| DOI：10.11887/j.cn.201402008 |
| 投稿日期：2013-05-24 |
| 基金项目:国家自然科学基金资助项目（11272348） |
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| Vibration reduction of payloads on spacecraft based on structure parameters of spacecraft-bracket system |
| ZHU Shiyao, LEI Yongjun |
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(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The dynamical interaction of payload brackets and spacecraft frame structure can observably magnify the responses of payloads. Vibration reduction studies usually focus on component-level payload brackets, but in this research, spacecraft frame structure and payload brackets are considered as a whole system (Spacecraft-Bracket System). A certain spacecraft was modeled with finite element method. With structure parameters extracted from this model, a system-level lumped parameter model was built, and the univariate analysis for structure parameters was done. The results indicate that the lumped parameter model can expose the coupling pattern of payload brackets and spacecraft frame structure clearly, and that the sensitivity for responses of payloads related to frequency parameters of both structures are evidently higher than that related to damp and mass parameters. Consequently, for improving the dynamic environment of payloads, the frequency relationship of payload brackets and spacecraft frame structure should be anatomized in spacecraft structure design stage. |
| Keywords: vibration reducing design payload bracket spacecraft frame structure lumped parameter model sensitivity analysis |
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