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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,ZENG Qing-shuang.Angle measurement error and compensation for decentration rotation of circular gratings[J].Journal of Harbin Institute Of Technology(New Series),2010,17(4):536-539.DOI:10.11916/j.issn.1005-9113.2010.04.019.
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Angle measurement error and compensation for decentration rotation of circular gratings
Author NameAffiliation
CHEN Xi-jun Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150001,China 
WANG Zhen-huan Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150001,China 
ZENG Qing-shuang Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150001,China 
Abstract:
As the geometric center of circular grating does not coincide with the rotation center,the angle measurement error of circular grating is analyzed. Based on the moire fringe equations in decentration condition,the mathematical model of angle measurement error is derived. It is concluded that the decentration between the centre of circular grating and the center of revolving shaft leads to the first-harmonic error of angle measurement. The correctness of the result is proved by experimental data. The method of error compensation is presented,and the angle measurement accuracy of the circular grating is effectively improved by the error compensation.
Key words:  circular grating  decentration  moire fringe  first-harmonic error
DOI：10.11916/j.issn.1005-9113.2010.04.019
Clc Number:P207
Fund:

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