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Proceedings Paper

Design and realization of the backup field controllers for LAMOST spectrographs
Author(s): Jianing Wang; Zhongyi Han; Yizhong Zeng; Songxin Dai; Zhongwen Hu; Yongtian Zhu; Lei Wang; Yonghui Hou
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Paper Abstract

The China-made telescope, LAMOST, consists of 16 Spectrographs to detect stellar spectra via 4000 optical fibers. In each spectroscope, many movable parts work in phase. Those parts are real-time controlled and managed by field controllers based on FPGA. The master control board of controllers currently being used is constructed by Altera's Cyclone II Development Kit. However, now Altera no longer produce such Kits. As the needs for maintenance and improvement, a backup control board is developed, so that once any field controller is broken, another can changed in time to ensure the control system not being interrupted. Using the newer Altera FPGA chip 3C40 as master control chip can minimize the change in the original design frame of the control structure so as to reduce the workload of software and hardware migration. This paper describes the design process of the Spectrographs backup field controller based on Cyclone 3C40 and gives the problems and solutions encountered during migration for controller hardware and software. The improved field controller not only retains the original controller functions, but also can serve for more motors and sensors due to the increase of input and output pins. Besides, no commodity supply limits, which saves expenses. The FPGA-field controller can also be used in other telescopes, astronomical instruments and industrial control systems as well.

Paper Details

Date Published: 24 September 2012
PDF: 9 pages
Proc. SPIE 8451, Software and Cyberinfrastructure for Astronomy II, 845130 (24 September 2012); doi: 10.1117/12.925798
Show Author Affiliations
Jianing Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Zhongyi Han, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Yizhong Zeng, Nanjing Institute of Astronomical Optics & Technology (China)
Songxin Dai, Nanjing Institute of Astronomical Optics & Technology (China)
Zhongwen Hu, Nanjing Institute of Astronomical Optics & Technology (China)
Yongtian Zhu, Nanjing Institute of Astronomical Optics & Technology (China)
Lei Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Yonghui Hou, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 8451:
Software and Cyberinfrastructure for Astronomy II
Nicole M. Radziwill; Gianluca Chiozzi, Editor(s)

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