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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:CHEN Xi-jun,WANG Zhen-huan,WANG Zheng-bang,ZENG Qing-shuang.Angle measurement error and compensation for pitched rotation of circular grating[J].Journal of Harbin Institute Of Technology(New Series),2011,18(3):11-15.DOI:10.11916/j.issn.1005-9113.2011.03.003.
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Angle measurement error and compensation for pitched rotation of circular grating
Author NameAffiliation
CHEN Xi-jun School of Astronautics,Harbin Institute of Technology,Harbin 150001,China 
WANG Zhen-huan School of Astronautics,Harbin Institute of Technology,Harbin 150001,China 
WANG Zheng-bang School of Astronautics,Harbin Institute of Technology,Harbin 150001,China 
ZENG Qing-shuang School of Astronautics,Harbin Institute of Technology,Harbin 150001,China 
Abstract:
As circular grating is not vertical to the shaft,the angle measurement error of the circular grating is analyzed.Based on the moire fringe equations in pitched condition,the mathematic model of the angle measurement error is derived.The paper comes to the conclusion that the nonorthogonal angle between the circular grating and the shaft leads to the second harmonic error of the angle measurement,and the correctness of the result is proved by the experimental data.The method of the error compensation is presented,and the angle measurement accuracy of the circular grating is improved by the error compensation.
Key words:  circular grating  nonorthogonal angle  moire fringe  second-harmonic error
DOI：10.11916/j.issn.1005-9113.2011.03.003
Clc Number:TP274
Fund:

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