Research on FAST Ideal Paraboloid

Qi Xie ； Jiahao Ge ； Xinyu Feng ； Min Zhao

《Frontiers in Sustainable Development》 1卷8期 (2021/11) Pp. 52-56

https://doi.org/10.29500/FSD.202111_1(8).0011

摘要

According to the isotropy of the reference sphere and the effective receiving domain of the feed cabin, the three-dimensional space problem is simplified to two-dimensional space for analysis, that is, to find the ＂ideal parabola＂. The measurement standard of ＂ideal parabola＂ is mainly the minimum total radial expansion and contraction of the actuator. At the same time, when the relative position between the apex of the parabola and the reference sphere changes, the focal distance of the parabola also changes. And the radial expansion and contraction of the actuator shall not be greater than ± 0.6. After comprehensive consideration, the expression of two-dimensional parabola is obtained. Further rotating the parabola around the z-axis can restore it to a three-dimensional ideal paraboloid.

關鍵字

Dimension transformation method ； Actuator radial expansion ； Rotation matrix

參考文獻

Li D , Dickey J M , Liu S . Preface:Planning the scientific applications of the Five-hundred-meter Aperture Spherical radio Telescope[J]. Research in Astronomy and Astrophysics, 2019, 19(02):3-4.

Nan R . Five hundred meter aperture spherical radio telescope (FAST)[J]. Science in China Series G, 2006, 49(2):129-148.

Li D , Nan R , Pan Z . The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project[J]. Proceedings of the International Astronomical Union, 2012, 20(S291):989-1024..

Nan R . Introduction to FAST-Five Hundred Meter Aperture Spherical Radio Telescope[C]// Asian-Pacific Regional International Astronomical Union meeting. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;, 2008.