LAMOST光纤单元闭环运行方式研究
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摘要
在现有的开环运行方式下,LAMOST光纤定位单元的定位精度完全依赖于标定精度,标定误差及其他影响因素将会对光纤定位单元造成长期的定位误差。使用闭环运行方式,不但能够免去繁杂的标定过程,还能保证定位精度的稳定性。在单元运行结束后,通过面阵CCD检测光纤位置,令单元做补偿修正运行,重复此过程直到光纤定位单元达到精度要求。实验证明,闭环运行方式可以代替开环运行方式运用到实际观测中。
In the existing open-loop run mode,the accuracy of LAMOST fiber positioner is entirely dependent on the accuracy of the calibration,thus the calibration error and other factors will cause long-term positioning error. By using the closed-loop run mode,the complicated calibration process can be eliminated,and the stability of the positioning accuracy also can be ensured. Correction running will do after the positioner finishes its first try by using CCD camera to do the detecting work. Repeat this process until the positioner reaches the optical accuracy. Experiments show that the closed- loop run mode can be used in the actual observations.
In the existing open-loop run mode,the accuracy of LAMOST fiber positioner is entirely dependent on the accuracy of the calibration,thus the calibration error and other factors will cause long-term positioning error. By using the closed-loop run mode,the complicated calibration process can be eliminated,and the stability of the positioning accuracy also can be ensured. Correction running will do after the positioner finishes its first try by using CCD camera to do the detecting work. Repeat this process until the positioner reaches the optical accuracy. Experiments show that the closed- loop run mode can be used in the actual observations.
引文
[1]邢晓正,胡红专,杜华生,等.用于LAMO-ST的并行可控式光纤定位系统[J].中国科学技术大学学报,1997,27(4):492-493.
[2]邹林通,刘志刚,胡红专,等.标定方法应用于LAMOST光纤定位单元的跑合测试[J].现代制造工程,2007(9):100-102.
[3]刘志刚,吴俊峰,刘力力,等.以前照方式进行LAMOST光纤位置检测的光点提取研究[J].机械研究与应用,2014(3):166-168.
[4]吴俊峰,刘志刚,刘力力,等.LAMOST光纤单元位置匹配问题研究[J].光学技术,2014(11):520-523.
[2]邹林通,刘志刚,胡红专,等.标定方法应用于LAMOST光纤定位单元的跑合测试[J].现代制造工程,2007(9):100-102.
[3]刘志刚,吴俊峰,刘力力,等.以前照方式进行LAMOST光纤位置检测的光点提取研究[J].机械研究与应用,2014(3):166-168.
[4]吴俊峰,刘志刚,刘力力,等.LAMOST光纤单元位置匹配问题研究[J].光学技术,2014(11):520-523.