Large Telescope Wind Load Estimation with Gradient Segments Superposition and its Servo Control  

作　　者：Jia-Heng Yu Song Xue Tian Luan Long-Yang Wang Pei-Yuan Lian Yue-Fei Yan De-Qing Kong Wu-Lin Zhao Qian Xu Cong-Si Wang 

机构地区：[1]School of Mechano-Electronic Engineering,Xidian University,Xi’an 710071,China [2]Guangzhou Institute of Technology,Xidian University,Guangzhou 510555,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]The 39th Research Institute of China Electronics Technology Group Corporation,Xi’an 710065,China [5]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China

出　　处：《Research in Astronomy and Astrophysics》2023年第9期79-90,共12页天文和天体物理学研究（英文版）

基　　金：the National Key Research and Development Program of China under No.2021YFC2203600;the National Natural Science Foundation of China under Nos.52005377 and 52275268;the National Defense Basic Scientific Research Program of China under No.JCKY2021210B007;Wuhu and Xidian University Special Fund for Industry-University-Research Cooperation under No.XWYCXY-012021012;Youth Innovation Team of Shaanxi Universities under No.201926.

摘　　要：Obtaining the wind load distribution on the telescope aperture is very important to estimate its influence and reduce the wind disturbance on the telescope system.The aperture of the radio telescope structure can be as large as 100 m and therefore,the uniform wind load on the aperture assumption is not suitable for the radio telescope with large aperture.In this paper,a gradient segments superposition method for calculating the wind load has been proposed.The proposed method has been constructed by combining two regional divisions.First,reflecting surface has been evenly divided in the altitudinal direction.Second,the reflecting surface has been divided into several uniform rings assuming that the wind load coefficient on different rings are different.For the 110 m aperture radio telescope,the wind load estimation results differ by 28%.After that,a structural dynamics model of telescope has been established and a fuzzy PID controller has been designed to reduce wind disturbance.The Root Mean Square Error of telescope pointing under wind disturbance has been reduced by 67.8%.It is suggested that the proposed wind load estimation method has lay a solid foundation for the design of the large telescope system under wind disturbance.

关 键 词：METHODS analytical-methods data analysis-methods numerical-telescopes 

分 类 号：P111.44[天文地球—天文学] TU312.1[建筑科学—结构工程]