The active surface control system for the Tian Ma Telescope

Jian Dong; Huiliang Jin; Qian Ye; Zhiqiang Shen; Qinghui Liu; Li Fu

doi:10.1117/12.2230560

26 July 2016 The active surface control system for the Tian Ma Telescope

Jian Dong, Huiliang Jin, Qian Ye, Zhiqiang Shen, Qinghui Liu, Li Fu

Proceedings Volume 9913, Software and Cyberinfrastructure for Astronomy IV; 991306 (2016) https://doi.org/10.1117/12.2230560
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Tian Ma Telescope (TM) is the largest fully steerable radio telescope in Asia. It has a primary reflector of 65-m in diameter with a shaped Cassegrain configuration. The primary reflector of the TM is an active surface with 1104 actuators for the 1008 surface panels. The panels of the telescope are divided into 18 rings, and 24 fan sections. Each section includes three sub-sections. The active surface system adopts TCP/IP Ethernet network and RS-485 bus as a dominating mode of communication. The control software works on the Windows system, and adopts the object-oriented technology. The photogrammetry and phase-coherent holography has been used to set the surface to about 0.3mm at the rigging angle. The FEM model is testing now. The Out-of-Focus holography and other techniques will be used to modify the dynamic surface deformation.

Citation Download Citation

Jian Dong, Huiliang Jin, Qian Ye, Zhiqiang Shen, Qinghui Liu, and Li Fu "The active surface control system for the Tian Ma Telescope", Proc. SPIE 9913, Software and Cyberinfrastructure for Astronomy IV, 991306 (26 July 2016); https://doi.org/10.1117/12.2230560

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