用于地基望远镜的高分辨率倾斜镜设计

孙鹏飞; 陈俊杰; 张勇; 李保庆; 褚家如

doi:10.11884/HPLPB201830.180026

用于地基望远镜的高分辨率倾斜镜设计

doi: 10.11884/HPLPB201830.180026

孙鹏飞^1,,
陈俊杰¹,
张勇^{2, 3},
李保庆^1, ,,
褚家如¹

1.
中国科学技术大学精密机械与精密仪器系, 合肥 230026
2.
中国科学院国家天文台南京天文光学技术研究所, 南京 210042
3.
中国科学院天文光学技术重点实验室, 南京 210042

基金项目:

国家自然科学基金项目 51675505

国家自然科学基金项目 11473050

详细信息

作者简介:
孙鹏飞(1990－), 男，硕士研究生，从事压电倾斜镜研究；pengfeis0213@163.com

通讯作者:
李保庆(1978－), 男，博士，从事自适应光学、微流控芯片和生物医疗仪器等研究；bqli@ustc.edu.cn

中图分类号: TH703
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- 被引次数: 0
出版历程
- 收稿日期: 2018-01-22
- 修回日期: 2018-03-09
- 刊出日期: 2018-07-15

Design of high resolution tip/tilt mirror for multi-mirror ground-based telescope

Sun Pengfei^1
,,
Chen Junjie¹,
Zhang Yong^{2, 3},
Li Baoqing^{1
, ,},
Chu Jiaru¹

1.
Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China
2.
Key Laboratory of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, China
3.
Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing 210042, China

摘要

摘要: 根据多镜面地基望远镜在近红外实现共相衍射极限成像的需求，提出了一种基于压电堆栈致动器的高分辨率倾斜镜设计方案。该方案以哑铃型柔性铰链和菱形位移缩小结构(RADS)作为倾斜镜的运动传递元件，压电堆栈致动器(PSA)作为动力元件，并使用电涡流传感器作为角度测量部件。介绍了高分辨倾斜镜的工作原理，并对哑铃型柔性铰链和菱形位移缩小结构进行设计。柔性铰链和位移缩小结构的关键结构参数均采用理论计算、实验和仿真进行优化。建立倾斜镜模型，利用理论计算和有限元仿真软件分别计算倾斜镜的倾斜角度和分辨率。实验结果表明：设计的倾斜镜角度分辨率达到0.017″，最大倾斜角度为14.6″，谐振频率为136.97 Hz，与有限元仿真结果相吻合，满足地基望远镜系统衍射极限成像的要求。
- 倾斜镜 /
- 高分辨率 /
- 压电堆栈致动器 /
- 地基望远镜 /
- 柔性铰链
Abstract: To meet the requirements of co-phase diffraction limit imaging, a high resolution tip/tilt mirror(TM) for multi-mirror ground-based telescope is proposed and designed. Three dumbbell-shaped flexible hinges and rhombus attenuated displacement structures (RADSs) were used in the TM system as the moving transmission devices, and three piezoelectric stack actuators (PSAs) were applied as driving components. The structure parameters of the flexible hinges and RADSs were optimized by theoretical, experimental and simulative methods. The experimental results show that the TM has an extreme high angular resolution of 0.017″, and the mechanical excursion angle is larger than 0.24′ with a natural frequency of 136.97 Hz, which accord well with the results of the theoretical estimation and finite element analyzing (FEA) simulation. The high angular resolution property indicates the multi-mirror telescope can achieve the imaging in diffraction limit.
- tip/tilt mirror /
- high angular resolution /
- piezoelectric stack actuator /
- ground-based telescope /
- flexible hinge

HTML全文

图 1 倾斜镜示意图和实验装置图

Figure 1. Schematic illustration and photo of the experimental setup of tip/tilt mirror(TM)

下载: 全尺寸图片幻灯片

图 2 哑铃型柔性铰链原型图和模型

Figure 2. Prototype and model of the flexible hinge

下载: 全尺寸图片幻灯片

图 3 柔性铰链的有限元模型和转动刚度结果

Figure 3. FEA model of the flexible hinge and the results of rotation stiffness

下载: 全尺寸图片幻灯片

图 4 菱形位移缩小结构的示意图和结果

Figure 4. Schematic illustration and attenuation ratio of rhombus attenuated displacement structure

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图 5 三点支撑式结构运动解耦

Figure 5. Motion decoupling of three-point support structure

下载: 全尺寸图片幻灯片

图 6 倾斜镜系统结果

Figure 6. Results of the tip/tilt mirror system

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图 7 倾斜镜分辨率

Figure 7. Angular solution of the tip/tilt mirror

下载: 全尺寸图片幻灯片

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