双读数头圆光栅偏心参数标定修正算法
2018-11-12
作者：王园
单位：合肥工业大学
摘要：圆光栅安装偏心误差是影响圆光栅角度测量精度的关键因素，偏心误差补偿是提高角度测量精度的重要方法。为准确辨识和补偿圆光栅安装偏心误差参数，在建立的圆光栅偏心误差模型基础上提出了一种双读数头平均误差补偿方法，对读数误差进行修正，并对测量与修正模型进行仿真实验。使用正23面棱体与光电自准直仪搭建实验装置，对所提方法的测量补偿效果进行验证。实验结果表明：采用所提出的补偿修正方法能够有效补偿圆光栅读数头读数偏差，圆光栅的测角精度达到1″以内。
关键词：圆光栅，偏心误差，双读数头，误差修正
中图分类号：TG801；TH162文献标志码：A
Correction Algorithm for Double Reading Head Eccentricity Parameters Calibration
Wang Yuan
Abstract:The eccentricity error of the circular grating affects the angle measurement accuracy of circular grating directly.It is an important method to improve the angle measurement accuracy by compensating the eccentricity error.In order to accurately identify and compensate the installation eccentric error parameters of circular grating，the circular grating eccentricity error model is established and a kind of mean error compensation method for double reading head is proposed to correct the reading error.The experimental device is built by using the positive 23 polyhedrons and photoelectric autocollimator.The compensation correction effect is verified.The experimental results showed that the reading deviation of circular grating reading head can be compensated effectively with the proposed correction method.The angular precision of the circular grating is less than 1″.
Keywords:circular grating；eccentric error；double reading head；error correction