| 大型矩形准直镜柔性支撑系统的多目标优化设计和稳定性分析 |
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| 引用本文： | 彭元镜,许明明,陈忆,胡中文,季杭馨,王磊. 大型矩形准直镜柔性支撑系统的多目标优化设计和稳定性分析[J]. 应用光学, 2021, 42(2): 215-222. DOI: 10.5768/JAO202142.0201002 |
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| 作者姓名： | 彭元镜 许明明 陈忆 胡中文 季杭馨 王磊 |
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| 作者单位： | 1.中国科学院国家天文台 南京天文光学技术研究所，江苏 南京 210042 |
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| 基金项目： | 国家自然科学基金（U1831108，11673042，11603054）；江苏省基金项目（BK20191507）；天文专项（WFOS正轴三反准直系统的概念研究） |
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| 摘 要： | 针对极大望远镜矩形准直镜设计了一种新型柔性支撑系统,即由6根空心圆柱杆为支撑主体的侧面支撑结构.利用多目标优化算法对柔性支撑系统的结构参数和位置参数进行优化设计,并对优化后的柔性支撑系统进行稳定性研究.优化后的准直镜柔性支撑系统在自重条件下镜面最大PV值为168.23 nm,RMS值为30.306 nm,质量为229....
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| 关 键 词： | 矩形反射镜 侧面支撑 柔性铰链 多目标优化 |
| 收稿时间： | 2020-05-28 |
Multi-objective optimization design and stability analysis of flexible support system for large rectangular collimator mirror |
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| Affiliation: | 1.National Astronomical Observatory of Chinese Academy of Sciences, Nanjing Institute of Astronomical Optics and Technology, Nanjing 210042, China2.Key Laboratory of Astronomical Optics and Technology, Nanjing Institute of Astronomical Optics and Technology, Nanjing 210042, China3.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A new flexible support system was designed for the rectangular collimator of extremely large telescope. The system was a side support structure supported by six hollow cylindrical bars. The structural parameters and position parameters of flexible support system were optimized by multi-objective optimization algorithm, and the stability of the optimized flexible support system was also studied. The optimized flexible support system for collimator had a maximum peak valley (PV) value of 168.23 nm, root-mean-square (RMS) value of 30.306 nm and a weight of 229.21 kg under the influence of gravity only, which satisfied the design requirements. When the ambient temperature changed within 20℃~23.7℃, the mirror performance would not be affected; besides, random ground vibration would not affect the performance of the collimator and destroy the support structure. The results show that the multi-objective optimization design of the flexible support mechanism for collimating mirror comprehensively considers the coupling problems between the shape parameters of the flexible support mechanism for collimating mirror, the safety and reliability of the mechanism and the deformation of the optical surface, etc. Designers can choose the most satisfactory solution on the global scale as needed, which will greatly reduce the development cost and cycle time. |
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