article · 2024
SMART: the closed-loop control system for LAMOST
Jia-Bin Wang, Zhaoxv Gan, Yilong Liu, Anzhi Wang, Gang Yue, Yunxiang Yan, Shengjia Wang, Qi Yan, Tao Geng, Pengfei Wang, Shuang Chen, Weimin Sun
Cited by 0Abstract and details only
Abstract
The accuracy of fiber positioning is crucial for the observation of multi-target fiber spectral telescopes such as LAMOST (Large Sky Area Multi-Object Fiber Spectroscopy Telescope). Most of the methods used for fiber positioning are openloop control or semi-closed-loop control, the efficiency cannot meet the requirements of next-generation spectral telescopes. Considering that, this paper proposes a fiber positioning method that can achieve a completely closed loop without blind spots based on SMART (Special-shaped Micro-lens Aimer for Real-time Targeting) and a dual-rotary positioning mechanism. The entire correction process can be described as follows: first, the light intensity obtained by the 6-channel photodetector is stored in a buffer. Then the pulses required for correction are calculated based on the data in the buffer and the correction algorithm by the computer. The running command is then sent to the stepper motor controller using serial communication to drive the stepper motor. After the movement, the program will run again to verify if the correction is done. After selecting a position in the first quadrant, 8 directions were selected to conduct automatic correction experiments after the optical fiber position offset. The experimental results show that the average farthest distance that the method could correct is 600μm, and 75.9% positioning accuracy under our closed control method can reach 10μm, 94.8% positioning accuracy can reach 20μm, 100% positioning accuracy can reach 30μm. For corrections within the 500μm offset distance, 97.5 % of the correction time is within one minute.
Cite this paper
Wang, J.-B., Gan, Z., Liu, Y., Wang, A., Yue, G., Yan, Y., Wang, S., Yan, Q., Geng, T., Wang, P., Chen, S., & Sun, W. (2024). SMART: the closed-loop control system for LAMOST. https://doi.org/10.1117/12.3019967
Wang, Jia-Bin, et al. “SMART: the closed-loop control system for LAMOST.” vol. 9912, 2024, p. 239, https://doi.org/10.1117/12.3019967.
Wang, Jia-Bin, Zhaoxv Gan, Yilong Liu, Anzhi Wang, Gang Yue, Yunxiang Yan, Shengjia Wang, et al. 2024. “SMART: the closed-loop control system for LAMOST.” https://doi.org/10.1117/12.3019967.
Wang, J.-B. et al. (2024) ‘SMART: the closed-loop control system for LAMOST’. Available at: https://doi.org/10.1117/12.3019967.
@article{wang2024smart,
title = {{SMART: the closed-loop control system for LAMOST}},
author = {Wang, Jia-Bin and Gan, Zhaoxv and Liu, Yilong and Wang, Anzhi and Yue, Gang and Yan, Yunxiang and Wang, Shengjia and Yan, Qi and Geng, Tao and Wang, Pengfei and Chen, Shuang and Sun, Weimin},
volume = {9912},
pages = {239},
year = {2024},
doi = {10.1117/12.3019967}
}Made from the index record. Check names, capitalisation and page numbers against the paper. Need another style? AI for Research has over 10,000.