An Online Measurement and Calibration Method for a Radio Telescope Sub-Reflector Support Structure Using Fiber Bragg Grating
文献类型：期刊论文
| 作者 | Xu, Qian2,3,4 ; Bao, Hong1
|
| 刊名 | MICROMACHINES
 |
| 出版日期 | 2023-05-22 |
| 卷号 | 14期号:5页码:17 |
| 关键词 | sub-reflector Fiber Bragg Grating (FBG) sensor self-structuring fuzzy network measurement model calibration B-spline functions |
| DOI | 10.3390/mi14051093 |
| 通讯作者 | Xu, Qian(xuqian@xao.ac.cn) |
| 英文摘要 | The position and altitude of a sub-reflector have an important influence on the pointing accuracy of a radio telescope. With the increase of the antenna aperture, the stiffness of the support structure for the sub-reflector decreases. This causes deformation of the support structure when environmental loads, such as gravity, temperature, and wind load, are applied to the sub-reflector, which will seriously influence antenna pointing accuracy. This paper proposes an online measurement and calibration method for assessing the deformation of the sub-reflector support structure based on the Fiber Bragg Grating (FBG) sensors. Firstly, a reconstruction model between the strain measurements and the deformation displacements of a sub-reflector support structure is established based on the inverse finite element method (iFEM). In addition, a temperature-compensating device with an FBG sensor is designed to eliminate the effects of temperature variations on strain measurements. Considering the lack of the trained original correction, a non-uniform rational B spline (NURBS) curve is built to extend the sample data set. Next, a self-structuring fuzzy network (SSFN) is designed for calibrating the reconstruction model, which can further improve the displacement reconstruction accuracy of the support structure. Finally, a full-day experiment was carried out using a sub-reflector support model to verify the effectiveness of the proposed method. |
| WOS关键词 | SHAPE |
| 资助项目 | National Key Research and Development Program of China[2021YFC2203601] ; Youth Innovation Promotion Association, CAS[Y202019] ; Natural Science Foundation of Xinjiang Autonomous Region[2022D01E85] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China (MOF) ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[PTYQ2022YZZD01] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000996747800001 |
| 资助机构 | National Key Research and Development Program of China ; Youth Innovation Promotion Association, CAS ; Natural Science Foundation of Xinjiang Autonomous Region ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China (MOF) ; Scientific Instrument Developing Project of the Chinese Academy of Sciences |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5477]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Xu, Qian |
| 作者单位 | 1.Xidian Univ, Key Lab Elect Equipment Struct Design, Minist Educ, Xian 710071, Peoples R China 2.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 4.Chinese Acad Sci, XinJiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Qian,Bao, Hong. An Online Measurement and Calibration Method for a Radio Telescope Sub-Reflector Support Structure Using Fiber Bragg Grating[J]. MICROMACHINES,2023,14(5):17. |
| APA | Xu, Qian,&Bao, Hong.(2023).An Online Measurement and Calibration Method for a Radio Telescope Sub-Reflector Support Structure Using Fiber Bragg Grating.MICROMACHINES,14(5),17. |
| MLA | Xu, Qian,et al."An Online Measurement and Calibration Method for a Radio Telescope Sub-Reflector Support Structure Using Fiber Bragg Grating".MICROMACHINES 14.5(2023):17. |
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来源：新疆天文台
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