范磊, 张景旭, 邵亮, 赵勇志. 采用液压Whiffle-tree的大口径主镜轴向支撑[J]. 红外与激光工程, 2013, 42(8): 2126-2131.
引用本文: 范磊, 张景旭, 邵亮, 赵勇志. 采用液压Whiffle-tree的大口径主镜轴向支撑[J]. 红外与激光工程, 2013, 42(8): 2126-2131.
Fan Lei, Zhang Jingxu, Shao Liang, Zhao Yongzhi. Axial support for large aperture primary mirror based on hydraulic Whiffle-tree[J]. Infrared and Laser Engineering, 2013, 42(8): 2126-2131.
Citation: Fan Lei, Zhang Jingxu, Shao Liang, Zhao Yongzhi. Axial support for large aperture primary mirror based on hydraulic Whiffle-tree[J]. Infrared and Laser Engineering, 2013, 42(8): 2126-2131.

采用液压Whiffle-tree的大口径主镜轴向支撑

Axial support for large aperture primary mirror based on hydraulic Whiffle-tree

  • 摘要: 轴向支撑对大口径主镜的定位及镜面变形有着重要的作用,为了深入开展该课题的研究,在传统机械Whiffle-tree支撑的基础上引入了轴向液压Whiffle-tree支撑。首先,从三点运动学定位支撑原理出发,介绍了Whiffle-tree支撑的特点与分类,着重对比分析了液压Whiffle-tree和机械Whiffle-tree支撑的优缺点。进而,根据液压Whiffle-tree的特点,分析推导了其建模方法,并运用该方法对一块18点液压轴向支撑的大口径主镜进行了静力学分析与优化,拟合后镜面变形RMS值为18.6 nm,满足设计要求。同时通过对不同建模分析结果的对比,验证了该建模方法的合理性和正确性,为大口径主镜的轴向支撑分析提供了一种参考。

     

    Abstract: Axial support system plays an important role in axial position and deformation of primary mirror. In order to profoundly develop such study, axial hydraulic Whiffle-tree support was introduced in the foundation of structure Whiffle-tree. First, according to the principle of kinematic constraint and support based on three axial points, the characteristic and category of Whiffle-tree system were introduced. Especially, the difference between structure Whiffle-tree and hydraulic Whiffle-tree was compared in detail. Then the model building method was elaborated, and an axial hydraulic Whiffle-tree support system for a large aperture primary mirror was selected to be calculated and optimized in statics. As a result, the mirror deformation is 18.6 nm which satisfies the design requirement and the rationality and accuracy of such modeling method are also certificated according to comparison between two different modeling methods.

     

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