Analysis and compensation of the reflector antenna pointing error under wind disturbance

doi:10.1088/1674-4527/21/6/150

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	Analysis and compensation of the reflector antenna pointing error under wind disturbance
	Xu, Qian 1,2; Zhang, Jie 1,3; Wang, Zhao-Yu 3; Pan, Huan-Zhi 3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2021-08-01
卷号	21 期号:6 页码:10
关键词	telescopes methods analytical methods numerical
ISSN号	1674-4527
DOI	10.1088/1674-4527/21/6/150
通讯作者	Xu, Qian(xuqian@xao.ac.cn)
英文摘要	A large reflector antenna has been widely used in satellite communications, gravitational wave detection, galaxy origin observation and other fields due to its narrow beam and high gain. With the increase of the antenna aperture and the improvement of the working frequency, the requirements for the pointing accuracy of an antenna are also rising. However, the effect of environmental load on the deformation of the antenna structure, which in turn affects its beam pointing, has become a key problem to be solved urgently in the antenna engineering applications. The key issue to solving this problem involves accurately estimating the pointing error caused by the structural deformation and designing an effective controller that is based on the structural deformation. In this paper, we first establish a dynamic model for antenna structure based on the modal superposition method. The model is then modified by using modal characteristics and the dynamic displacement information of the sampling points to achieve the purpose of accurately estimating the structural deformation. Secondly, by considering the influence of the deformation of the rotating shaft and the reflector surface on the pointing accuracy, a control-oriented pointing error analysis model is established for estimating the pointing error caused by the environmental load in real time. Thirdly, based on considering the influence of the shaft deformation on the error compensation, the feedback error amount is decoupled and corrected to improve the accuracy of the compensation error. Finally, this paper analyzes and verifies the 65 m S/X-band dual reflector antenna with a numerical example. We consider a fluctuating wind with an average wind speed of 10 m s(-1) as an example, which results in a maximum pointing error of 55.82 '' as calculated by the antenna theoretical model, whereas the maximum pointing error as predicted by our model is 68.27 ''. The pointing error after compensating for the cause of the environmental load with the modified controller is reduced to 10.57 '', which effectively improves the antenna pointing performance.
资助项目	Chinese Academy of Sciences (CAS) Light of West China Program[2017-XBQNXZ-B-023] ; Xinjiang Uygur Autonomous Region Tianshan innovation team[2018D14008] ; Heaven lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; Natural Science Basic Research Plan in Shaanxi province of China[2019JQ-269] ; Operation, Maintenance and upgrading Fund for Astronomical Telescopes and Facility Instruments
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000684225600001
资助机构	Chinese Academy of Sciences (CAS) Light of West China Program ; Xinjiang Uygur Autonomous Region Tianshan innovation team ; Heaven lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; Natural Science Basic Research Plan in Shaanxi province of China ; Operation, Maintenance and upgrading Fund for Astronomical Telescopes and Facility Instruments
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4218]
专题	研究单元未命名
通讯作者	Xu, Qian
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci Radio Astron, Key Lab, Urumqi 830011, Peoples R China 3.Xidian Univ, Key Lab Elect Equipment Struct Design, Minist Educ, Xian 710071, Peoples R China
推荐引用方式 GB/T 7714	Xu, Qian,Zhang, Jie,Wang, Zhao-Yu,et al. Analysis and compensation of the reflector antenna pointing error under wind disturbance[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(6):10.
APA	Xu, Qian,Zhang, Jie,Wang, Zhao-Yu,&Pan, Huan-Zhi.(2021).Analysis and compensation of the reflector antenna pointing error under wind disturbance.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(6),10.
MLA	Xu, Qian,et al."Analysis and compensation of the reflector antenna pointing error under wind disturbance".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.6(2021):10.