Kinematic evaluation of the whiffletree lateral support setup and its application for the mirror support of the TMT tertiary mirror
Kinematic evaluation of the whiffletree lateral support setup and its application for the mirror support of the TMT tertiary mirror
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Whiffletree侧向支撑装置的运动学评估及其在TMT三镜镜面支撑中的应用
DOI：
10.2971/jeos.2015.15027
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
X. Jin
中科院分区：
文献类型：
--
作者：
W. Fu;Z. Linmin;X. Jin
随着望远镜反射镜口径的不断增大，横向支撑变得越来越重要。为了寻找满足TMT三级反射镜要求的机构，在经典三点弯曲支撑机构的基础上，研究了十二点侧向支撑机构的基本内部关系和性能。然后提出了虚拟等效圆的概念来评估不同的潜在设置。通过研究虚拟等效圆半径与热变形和谐振频率的关系，可以得出虚拟等效圆半径越大，热变形越小，谐振频率越高的结论。初步研究结果表明，TMT三级反射镜表面图形误差和热变形要求可以很容易地满足。然而，获得高于15赫兹的谐振频率更加困难。基于虚拟等效圆的概念，对TMT三级反射镜支撑装置进行了优化，得到的谐振频率为17.7 Hz，满足要求。whiffletree横向支撑装置可应用于类似的反射镜支撑结构。
With increasing size of the reflecting mirror apertures in telescopes, the lateral support is becoming more and more important. In order to find a setup satisfying the requirements for the TMT tertiary mirror, based on the classic three-point flexure support setup, a twelve-point lateral support setup was investigated its basic internal relations and properties were investigated. The virtual equivalent circle concept is then proposed to evaluate different potential setups. By studying the relationship between the virtual equivalent circle radius and the thermal deformation and resonant frequency, it can be concluded that a larger virtual equivalent circle radius results in a smaller the thermal deformation and a higher resonant frequency. Preliminary research results suggested that the TMT tertiary mirror surface figure error and thermal deformation requirements can easily be met. However, it was more difficult to obtain resonant frequencies higher than 15 Hz. Based on the virtual equivalent circle concept, the TMT tertiary mirror support setup was optimized, resulting in a resonant frequency of 17.7 Hz, which satisfies the requirements. The whiffletree lateral support setup can be applied to similar reflecting mirror support structures.
影响因子：
1.3
作者：
L. Baker
通讯作者：
L. Baker