基于光纤陀螺的转台周期性误差抑制方法

杨永清; 梁雁冰; 李治国; 梁冬生

红外与激光工程, 2015, 44 (6): 1898, 网络出版: 2016-01-26

基于光纤陀螺的转台周期性误差抑制方法

Gimbals periodic error suppression based on fiber optic gyroscope

论文大纲

杨永清 ^1,2,*梁雁冰 ^1,2李治国 ^1,2梁冬生 ^1,2

作者单位

¹ 中国科学院西安光学精密机械研究所，陕西西安710119

² 中国科学院大学，北京 100049

光纤陀螺测角周期误差跟踪转台傅里叶理论 fiber gyro angular periodic error tracking gimbals Fourier series

摘要

为抑制测角系统周期性测量误差对光电跟踪系统速度平稳性和成像效果的影响，采用光纤陀螺系统建立误差模型和误差补偿器，对系统进行误差补偿控制。首先，对测角系统测量结果中含有周期性误差的机理进行分析，建立了周期性测角误差的数学模型；其次，采用高精度光纤陀螺建立了一套基于傅里叶理论的角度测量误差模型采集系统，并通过七个步骤提取了测角误差模型的具体表达式；然后，根据提取的测角误差表达式，分四个步骤对系统周期性误差进行补偿控制。最后，通过跟踪成像实验来验证控制补偿的有效性。实验结果表明，跟踪速度误差的最大值降低到0.04 (°)/s，比未补偿控制时降低了8倍左右，满足光学成像系统速度误差小于0.1 (°)/s的要求，条纹成像效果得到了明显改善。

Abstract

In order to suppress the periodic angle measuring error′s fluctuation on gimbals and the imaging effect of photoelectric tracking, a measuring error model and an error control algorithm were established. Firstly, the mechanism of the measurement error of angular measuring system was analyzed, and a mathematical model for the periodic error was established in this paper. Secondly, a measuring error acquisition system based on the high precision fiber optic gyroscope and Fourier was established, and a specific expression of angle measurement error model was established through seven experimental procedures. Then, the periodic system error was compensated according to the measured angle error expressions through four steps. Finally, the effectiveness of control compensation was verified by tracking imaging experiments, and the experimental results show that speed error is reduced to 0.04 (°)/s, is reduced 8 times. The error meets the requirement of the imaging system less than 0.1 (°)/s, and the stripe imaging effect is greatly improved.

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杨永清, 梁雁冰, 李治国, 梁冬生. 基于光纤陀螺的转台周期性误差抑制方法[J]. 红外与激光工程, 2015, 44(6): 1898. Yang Yongqing, Liang Yanbin, Li Zhiguo, Liang Dongsheng. Gimbals periodic error suppression based on fiber optic gyroscope[J]. Infrared and Laser Engineering, 2015, 44(6): 1898.

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