题名: Subdivision error analysis and compensation for photoelectric angle encoder in a telescope control system
作者: Su, Yanrui 1,2,3 ; Wang, Qiang 1,2 ; Yan, Fabao 1,2,4 ; Liu, Xiang 1,2 ; Huang, Yongmei 1,2
刊名: Mathematical Problems in Engineering
出版日期: 2015
卷号: 2015, 页码: 967034 学科分类: Control systems - Error analysis - Errors - Photoelectricity - Telescopes - Traction control
DOI: 10.1155/2015/967034
通讯作者: Huang, Yongmei
文章类型: 期刊论文
中文摘要: As the position sensor, photoelectric angle encoder affects the accuracy and stability of telescope control system (TCS). A TCS-based subdivision error compensation method for encoder is proposed. Six types of subdivision error sources are extracted through mathematical expressions of subdivision signals first. Then the period length relationships between subdivision signals and subdivision errors are deduced. And the error compensation algorithm only utilizing the shaft position of TCS is put forward, along with two control models; Model I is that the algorithm applies only to the speed loop of TCS and Model II is applied to both speed loop and position loop. Combined with actual project, elevation jittering phenomenon of the telescope is discussed to decide the necessity of DC-type subdivision error compensation. Low-speed elevation performance before and after error compensation is compared to help decide that Model II is preferred. In contrast to original performance, the maximum position error of the elevation with DC subdivision error compensation is reduced by approximately 47.9% from 1.42″ to 0.74″. The elevation gets a huge decrease in jitters. This method can compensate the encoder subdivision errors effectively and improve the stability of TCS. © 2015 Yanrui Su et al. 英文摘要: As the position sensor, photoelectric angle encoder affects the accuracy and stability of telescope control system (TCS). A TCS-based subdivision error compensation method for encoder is proposed. Six types of subdivision error sources are extracted through mathematical expressions of subdivision signals first. Then the period length relationships between subdivision signals and subdivision errors are deduced. And the error compensation algorithm only utilizing the shaft position of TCS is put forward, along with two control models; Model I is that the algorithm applies only to the speed loop of TCS and Model II is applied to both speed loop and position loop. Combined with actual project, elevation jittering phenomenon of the telescope is discussed to decide the necessity of DC-type subdivision error compensation. Low-speed elevation performance before and after error compensation is compared to help decide that Model II is preferred. In contrast to original performance, the maximum position error of the elevation with DC subdivision error compensation is reduced by approximately 47.9% from 1.42″ to 0.74″. The elevation gets a huge decrease in jitters. This method can compensate the encoder subdivision errors effectively and improve the stability of TCS. © 2015 Yanrui Su et al. 收录类别: SCI
; Ei
语种: 英语
WOS记录号: WOS:000359271900001
ISSN号: 1024-123X
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内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/4169
Appears in Collections: 光电工程总体研究室（一室）_期刊论文
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作者单位: 1. Institute of Optics and Electronics, Chinese Academy of Sciences, No. 1 Guangdian Road, Chengdu, China
Recommended Citation:
Su, Yanrui,Wang, Qiang,Yan, Fabao,et al. Subdivision error analysis and compensation for photoelectric angle encoder in a telescope control system[J]. Mathematical Problems in Engineering,2015,2015:967034.
