基于等效风场试验的QTT台址风场分布调控技术方案初探  

Preliminary study of regulation technology of wind field distribution on QTT site based on test of equivalent wind field

作　　者：王从思[1,2] 王雪晴 许谦[2] 王娜[2] 郑元鹏[3] 杜彪[3] 连培园 薛松 严粤飞 段玉虎 石禹 贾昱 WANG CongSi;WANG XueQing;XU Qian;WANG Na;ZHENG YuanPeng;DU Biao;LIAN PeiYuan;XUE Song;YAN YueFei;DUAN YuHu;SHI Yu;JIA Yu(Key Laboratory of Electronic Equipment Structure Design, Ministry of Education, Xidian University, Xi’an 710071, China;XinJiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China;CETC No. 54 Research Institute, Shijiazhuang 050081, China;CETC No. 39 Research Institute, Xi’an 710065, China;Department of Mechanical Engineering, University of Chester, Chester CH1 4BJ, UK)

机构地区：[1]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 [2]中国科学院新疆天文台,乌鲁木齐830011 [3]中国电子科技集团公司第五十四研究所,石家庄050081 [4]中国电子科技集团公司第三十九研究所,西安710065 [5]Department of Mechanical Engineering,University of Chester,Chester CH14BJ,UK

出　　处：《中国科学：物理学、力学、天文学》2019年第9期126-132,共7页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家重点基础研究发展计划(编号:2015CB857100);陕西省自然科学基金(编号:2018JZ5001);天山创新团队计划(编号:2018D14008);国家自然科学基金(编号:U1737211);中国科学院西部之光计划(编号:2017-XBQNXZ-B-024)资助项目

摘　　要：针对高频段大口径全向可动射电望远镜QTT对电性能的高要求,必须降低风扰动对天线的影响.本文分析了QTT台址地形地貌以及风场分布的特点,提出了一种主动降低天线所在区域风速的QTT台址风场分布调控技术方案,进一步搭建了用于QTT台址风场分布调控微缩模型的等效风场试验,通过试验数据分析,确定了QTT风场分布调控技术方案的可行性,并初步给出了经风场调控后,风速显著降低的区域范围以及风速降低的幅度,为QTT台址风场分布的调控提供了技术依据,从而可大大增加射电望远镜的有效观测时间.The effect of wind gust on the large reflector antenna is one of the main factors that can affect the antenna performance and therefore, this effect must be minimized to meet the strict performance requirement in the world largest steerable telescope, which is QiTai Telescope(QTT). In this paper, the characteristics of the topography as well as the wind distribution around QTT site have been analyzed and consequently, a technology for improving the wind distribution in an active way has been proposed. Additionally, an equivalent wind distribution test rig for the proposed technology has been built in the lab and the corresponding experiment has been carried out. The experimental data indicated that the proposed technology was a promising tool for regulating the wind distribution for the large reflector antenna and it was found that the proposed technology can significantly reduce the wind speed as well as the wind impact range after the wind regulation has been given in the test. The results in this paper has provided a solid foundation for the regulation of the wind distribution of the QTT site.

关 键 词：射电望远镜 反射面天线 风场分布 风场调控 

分 类 号：P111.44[天文地球—天文学]