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The Control System of the Active Main Reflector for FAST

Published online by Cambridge University Press:  12 April 2016

Yuhai Qiu  and
Lichun Zhu
Yuhai Qiu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Lichun Zhu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China

Abstract

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The main reflector of FAST consists of about 1800 elementary units. Each unit has three adjustable supports to fix its position, and its position is adjusted by means of mechanical actuators. According to the radio source position at any given time, all the actuators are continuously adjusted to form a proper paraboloid in real time during the course of the observation. The basic requirements of such a control system are discussed. A fieldbus control system based on LonWorks technology is suggested to control all 1800 actuators. The main advantages of this distributed control system are its reliability, flexibility, efficiency and economics.

Keywords

Spherical Radio telescopeLonWorks control system
Type
Chapter Five Future Large Telescope Projects: SKA and FAST
Information
International Astronomical Union Colloquium , Volume 182: Sources and Scintillations: Refraction and Scattering in Radio Astronomy , 2001 , pp. 261 - 265
Copyright
Copyright © Kluwer 2001

References

Peng, B., et al: 2000, ApSS, in press.Google Scholar
Qiu, Y.: 1998, A novel design for a giant Arecibo-type Spherical radio telescope with an active main reflector, MNRAS 301, 827–830.CrossRefGoogle Scholar