Fault Diagnosis of the LAMOST Fiber Positioner Based on a Long Short-term Memory(LSTM)Deep Neural Network  

作　　者：Yihu Tang Yingfu Wang Shipeng Duan Jiadong Liang Zeyu Cai Zhigang Liu Hongzhuan Hu Jianping Wang Jiaru Chu Xiangqun Cui Yong Zhang Haotong Zhang Zengxiang Zhou 

机构地区：[1]Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,China [2]National Astronomical Observatories/Nanjing Institute of Astronomical Optics&Technology,Chinese Academy of Sciences,Nanjing 210042,China [3]CAS Key Laboratory of Astronomical Optics&Technology,Nanjing Institute of Astronomical Optics&Technology,Nanjing 210042,China [4]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [5]Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Research in Astronomy and Astrophysics》2023年第12期81-95,共15页天文和天体物理学研究（英文版）

基　　金：Funding for the research was provided by Cui Xiangqun’s Academician Studio;Funding for the project has been provided by the National Development and Reform Commission。

摘　　要：The Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST)has been in normal operation for more than 10 yr,and routine maintenance is performed on the fiber positioner every summer.The positioning accuracy of the fiber positioner directly affects the observation performance of LAMOST,and incorrect fiber positioner positioning accuracy will not only increase the interference probability of adjacent fiber positioners but also reduces the observation efficiency of LAMOST.At present,during the manual maintenance process of the positioner,the fault cause of the positioner is determined and analyzed when the positioning accuracy does not meet the preset requirements.This causes maintenance to take a long time,and the efficiency is low.To quickly locate the fault cause of the positioner,the repeated positioning accuracy and open-loop calibration curve data of each positioner are obtained in this paper through the photographic measurement method.Based on a systematic analysis of the operational characteristics of the faulty positioner,the fault causes are classified.After training a deep learning model based on long short-term memory,the positioner fault causes can be quickly located to effectively improve the efficiency of positioner fault cause analysis.The relevant data can also provide valuable information for annual routine maintenance methods and positioner designs in the future.The method of using a deep learning model to analyze positioner operation failures introduced in this paper is also of general significance for the maintenance and design optimization of fiber positioners using a similar double-turn gear transmission system.

关 键 词：telescopes-techniques image processing-methods analytical-techniques SPECTROSCOPIC 

分 类 号：P111[天文地球—天文学]