Summary
International Symposium on Antennas and Propagation
2008
Session Number:3C24
Session:
Number:3C24-1
On Static Calibrating and Realtime Tracking Method for Feed Cabin of 50-m LT Model
C. S. Wang, H. Bao, Y. Y. Qiu,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
With the development of radio astronomy, it becomes necessary to build a new-generation large radio telescope (LT), which was proposed by radio astronomers [1]. Since then, this work has been kept going forward with continuous progress and more focus. KARST Project of spherical array of Arecibo-type telescope [2] with about 30 large spherical reflectors and each antenna with the diameter of up to 300-500 m was proposed in 1995, in China [3], because there is a unique Karst formations in Guizhou Province of China [4]. So far the largest spherical antenna is the Arecibo spherical radio telescope with a diameter of 305 m, which was built in the 1970’s and located in Puerto Rico, USA. Because of the limitation of technology in the 1970s, the azimuth and pitching tracking are all implemented in the terms of mechanical methods, which not only lead to lower tracking accuracy and high cost, but also result in a very heavy line fee and back-up structure with a 1000-ton weight. In order to overcome these problems, an optomechatronics design project with integration of mechanical, electronic and optical technologies is developed [5-6], as shown in Fig. 1. In this design project, the backup structure- type of Arecibo telescope is thrown away, a light moving cabin structure driven by six cables with six big power servomechanisms, and the feed arranged on the moving platform of Stewart fine tuning platform [7-8] are adopted.