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Proceedings Paper

Design and realization of the real-time spectrograph controller for LAMOST based on FPGA
Author(s): Jianing Wang; Liyan Wu; Yizhong Zeng; Songxin Dai; Zhongwen Hu; Yongtian Zhu; Lei Wang; Zhen Wu; Yi Chen
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Paper Abstract

A large Schmitt reflector telescope, Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST), is being built in China, which has effective aperture of 4 meters and can observe the spectra of as many as 4000 objects simultaneously. To fit such a large amount of observational objects, the dispersion part is composed of a set of 16 multipurpose fiber-fed double-beam Schmidt spectrographs, of which each has about ten of moveable components realtimely accommodated and manipulated by a controller. An industrial Ethernet network connects those 16 spectrograph controllers. The light from stars is fed to the entrance slits of the spectrographs with optical fibers. In this paper, we mainly introduce the design and realization of our real-time controller for the spectrograph, our design using the technique of System On Programmable Chip (SOPC) based on Field Programmable Gate Array (FPGA) and then realizing the control of the spectrographs through NIOSII Soft Core Embedded Processor. We seal the stepper motor controller as intellectual property (IP) cores and reuse it, greatly simplifying the design process and then shortening the development time. Under the embedded operating system μC/OS-II, a multi-tasks control program has been well written to realize the real-time control of the moveable parts of the spectrographs. At present, a number of such controllers have been applied in the spectrograph of LAMOST.

Paper Details

Date Published: 15 July 2008
PDF: 7 pages
Proc. SPIE 7019, Advanced Software and Control for Astronomy II, 70191P (15 July 2008); doi: 10.1117/12.788647
Show Author Affiliations
Jianing Wang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Liyan Wu, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate School of the Chinese Academy of Sciences (China)
Yizhong Zeng, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Songxin Dai, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Zhongwen Hu, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Yongtian Zhu, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Lei Wang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Zhen Wu, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Yi Chen, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 7019:
Advanced Software and Control for Astronomy II
Alan Bridger; Nicole M. Radziwill, Editor(s)

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