Surface Adjustment Strategy for a Large Radio Telescope with Adjustable Dual Reflectors

Peiyuan Lian, Congsi Wang, Song Xue, Qian Xu, Yu Shi, Yu Jia, Binbin Xiang, Yan Wang, Yuefei Yan

Research output: Contribution to journalArticle

Abstract

With the development of large-aperture and high-frequency radio telescopes, a surface adjustment procedure for the compensation of surface deformations has become of great importance. In this study, an innovative surface adjustment strategy is proposed to achieve an automated adjustment for the large radio telescope with adjustable dual reflectors. In the proposed strategy, a high-precision and long-distance measurement instrument is adopted and installed on the back of the sub-reflector to measure the distances and elevation angles of the target points on the main reflector. Here, two surface adjustment purposes are discussed. The first purpose is to ensure that the main reflector and sub-reflector are always positioned at their ideal locations during operation. The second purpose is to adjust the main reflector to the location of the best fitting reflector, and the sub-reflector to the focus of the best fitting reflector. Next, the calculation procedures for the adjustments of the main reflector and the sub-reflector are discussed in detail, and corresponding simulations are carried out to verify the proposed method. The results show that the proposed strategy is effective. This study can provide helpful guidance for the design of automated surface adjustments for large telescopes.

Original languageEnglish
Pages (from-to)2669-2677
Number of pages9
JournalIET Microwaves, Antennas & Propagation
Volume13
Issue number15
Early online date15 Aug 2019
DOIs
Publication statusPublished - 18 Dec 2019

Bibliographical note

This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antennas & Propagation and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library

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