李宗轩, 金光, 张雷, 闫勇, 解鹏, 孔林. 空间光学遥感器大型分束棱镜支撑结构设计[J]. 红外与激光工程, 2012, 41(8): 2096-2101.
引用本文: 李宗轩, 金光, 张雷, 闫勇, 解鹏, 孔林. 空间光学遥感器大型分束棱镜支撑结构设计[J]. 红外与激光工程, 2012, 41(8): 2096-2101.
shu
Li Zongxuan, Jin Guang, Zhang Lei, Yan Yong, Xie Peng, Kong Lin. Support structure of large beam splitter in space[J]. Infrared and Laser Engineering, 2012, 41(8): 2096-2101.
Citation: Li Zongxuan, Jin Guang, Zhang Lei, Yan Yong, Xie Peng, Kong Lin. Support structure of large beam splitter in space[J]. Infrared and Laser Engineering, 2012, 41(8): 2096-2101.
shu

空间光学遥感器大型分束棱镜支撑结构设计

Support structure of large beam splitter in space

    摘要
  • 摘要: 分束棱镜是大型空间遥感器分离光束的重要部件。为解决空间遥感器中大型分束棱镜的支撑 问题，对尺寸为200mm200mm200mm 的分束棱镜的支撑结构展开研究。提出基于半运动学支撑和 被动温度补偿原理的立方分束棱镜支撑结构，建立棱镜的接触约束，模拟边界条件的非线性，利用非线 性有限元方法进行工程分析，最后分析验证。结果显示，在自重与15℃稳态温度变化耦合作用下分束 棱镜通光面面形误差PV 值优于73.2 nm，RMS 值优于12 nm；棱镜组件的一阶固有频率达到183 Hz；表 明该分束棱镜支撑结构方案设计合理，能够满足空间环境下对其结构刚度与热稳定性的要求。

     

    Abstract: Beamsplitterisacrucialpartofalargespaceopticalremotesensortosplittheimaginglight intotwobeams.Inordertosolvetheproblemofsupportingalargebeamsplitterofaspacecamera, theresearchworkonthesupportingsyructureofalargebeamsplitterwithadimensionof200mm200mm 200mmwasperformed.Thedesignofthesupportingstructureofalargecubicbeamsplitterbasedon thephilosophyofsemi-kinematicmountingandpassivethermalcompensationwaspresented.Thecontact pairconstrainswerebuilt,thenonlinearityoftheboundaryconditionwassimulatedandtheengineering analysisontheprismassemblyutilizingnonlinearfiniteelementmethodswasperformed.Theanalysis resultsindicatedthesurfacefigureprecisionofthebeamsplitter'sLightPassSurface,thusthePVvalue waslessthan73.2nmandtheRMSvaluewaslessthan12nmunderthecouplingofgravityand15℃ stationarytemperaturechange;thefirstnaturalfrequencyofthebeamsplitterassemblyreached183Hz. Thesupportingstructuredesignofthebeamsplittterisvalid,andcansatisfythedemandsonthe structuralstiffnessandthermalstabilityinthespaceenvironment.

     

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