Institutional Repository of Radio Astronomy Research Laboratory
| 基于自回归滑动平均模型的大口径天线风速预测方法 | |
| Alternative Title | ARMA Model-Based Wind Speed Prediction for Large Radio Telescope |
李琳1,2 ; 许谦2,3,4; 王文娟5; 李帅5; 薛松5; 连培园5; 王从思5; 何飞龙2,6
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| 2022-11-01 | |
| Source Publication | 天文学报
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| ISSN | 0001-5245 |
| Volume | 63Issue:6Pages:124-138 |
| Contribution Rank | 2 |
| Abstract | 针对大口径、高性能射电望远镜天线受到的随机及时变风扰的问题,利用自回归滑动平均模型预测望远镜周围风速,提前计算风致结构变形量,同时为望远镜伺服控制系统提供足够执行时间来降低风扰影响.基于新疆奇台110 m口径全向可动射电望远镜(QiTai Telescope,QTT)台址风场数据特征,通过赤池信息准则和贝叶斯信息准则辨识模型阶次,利用最大似然法估计模型参数,分析模型残差特性以检验自回归滑动平均模型的有效性.通过计算不同季度预测数据与测试数据偏差得到预测模型的精度,夏季平均绝对误差为0.133 m·s~(-1),秋季平均绝对误差为0.162 m·s~(-1),冬季平均绝对误差为0.287 m·s~(-1).整体来看,基于QTT台址不同季度风速数据建立的自回归滑动平均模型预测误差较小,满足射电望远镜风扰控制系统的需求,能为大口径射电望远镜风扰控制提供必要数据支撑. |
| Other Abstract | Phased Array Feed is a receiver technology that places the array antenna at the focal plane field of radio telescope to achieve higher gain and more flexible beam regulation.As same as the array antenna,it is composed of multiple antenna elements in a certain way,so electromagnetic coupling between the array elements during operation is inevitable.In this paper,the helical antenna is selected as the array antenna unit,and the working frequency is 1.25 GHz.The independent antenna is simulated and optimized,and the-10 dB impedance bandwidth is only 70 MHz.Relying on the antenna unit for the model of rectangular arrangement 5 × 5 helical antenna array,the array element spacing of 1,0.5,0.25 and 0.125 times of wavelength are selected respectively (1.25 GHz@0.24 m),in order to verify the influence of mutual coupling effect under different array element spacing on the bandwidth of the whole array.Finally,by matching the input impedance of each array element,the simulation shows that under 0.25 times the wavelength spacing,the-10 dB impedance bandwidth of the central element of the array is expanded to 550 MHz,and the bandwidth of the array antenna basically represents the working bandwidth used as the phased array feed.The above work not only deepens the understanding of the bandwidth characteristics of the array antenna,but also makes it possible for the phased array feed applied to the radio telescope system to achieve a wider working bandwidth. |
| Keyword | 望远镜 现场测试 方法:数据分析 |
| DOI | 10.15940/j.cnki.0001-5245.2022.06.011 |
| URL | 查看原文 |
| Indexed By | CSCD ; 中文核心期刊要目总览 |
| Language | 中文 |
| CSCD ID | CSCD:7347476 |
| Citation statistics |
Cited Times:2[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5094 |
| Collection | 射电天文研究室_天线技术实验室 110米口径全可动射电望远镜（QTT）_技术成果 |
| Affiliation | 1.新疆大学物理科学与技术学院 乌鲁木齐830046; 2.中国科学院新疆天文台 乌鲁木齐830011; 3.中国科学院射电天文重点实验室 乌鲁木齐830011; 4.新疆射电天体物理重点实验室 乌鲁木齐830011; 5.西安电子科技大学电子装备结构设计教育部重点实验室 西安710071; 6.中国科学院大学 北京100049 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 李琳,许谦,王文娟,等. 基于自回归滑动平均模型的大口径天线风速预测方法[J]. 天文学报,2022,63(6):124-138. |
| APA | 李琳.,许谦.,王文娟.,李帅.,薛松.,...&何飞龙.(2022).基于自回归滑动平均模型的大口径天线风速预测方法.天文学报,63(6),124-138. |
| MLA | 李琳,et al."基于自回归滑动平均模型的大口径天线风速预测方法".天文学报 63.6(2022):124-138. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 李琳-2022-基于自回归滑动平均模型的（893KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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