Angle measurement error and compensation for decentration rotation of circular gratings
CHEN Xi-jun, WANG Zhen-huan, 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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Angle measurement error and compensation for decentration rotation of circular gratings
本站小编 哈尔滨工业大学/2019-10-23
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