The previous module on LAMOST (Large Area Multi-Object Fiber Spectroscope Telescope) controls and drives only one fiber positioning unit, resulting in a low integration. Meanwhile, each unit is driven by two motors respectively located on the center revolving shaft and the eccentric revolving shaft. In this case, these positioning units require a mass of power connecting wires that increase flexible connections in excess and decrease the system linearity. To make an improvement, this paper proposes a new module, which occupies small space in compact structure and is able to drive 37 optical fiber positioning units simultaneously. The module design of the controlling part and the driving part are based on FPGA with its strong capabilities of parallel processing, large quantities of I/O resources and low power consumption. With experiments, the new designed module improves the level of system integration, ensures the reliability and reduces the power consumption, which meets all the requirements as expected.

Date Published: 8 July 2014
PDF: 10 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91472Z (8 July 2014); doi: 10.1117/12.2055039

Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)