中国激光, 2020, 47 (9): 0904002, 网络出版: 2020-09-16
基于卡尔曼滤波的PGC解调非线性误差补偿方法 下载: 1061次
Nonlinear Error Compensation Method for PGC Demodulation Based on Kalman Filtering
图 & 表
图 1. PGC-Arctan算法在不同情况下的相位解调误差。(a)相位延迟变化;(b)调制深度变化
Fig. 1. Phase demodulation errors of PGC-Arctan algorithm in different situations. (a) Phase delay change; (b) modulation depth change
图 3. 卡尔曼滤波估计正交分量参数的收敛趋势。(a)交流幅值;(b)直流偏置
Fig. 3. Kalman filter estimates convergence trend graph of orthogonal component parameters. (a) Alternating current amplitude; (b) direct current bias
图 4. 基于EOM的正弦相位调制干涉仪。(a)原理框图;(b)实验装置
Fig. 4. Sine phase modulation interferometer based on EOM. (a) Principle block diagram; (b) experimental device
图 5. 补偿前后的相位解调误差。(a)补偿前;(b)补偿后
Fig. 5. Phase demodulation error before and after compensation. (a) Before compensation; (b) after compensation
图 6. 不同频率下补偿前后的位移测量结果。(a) 100 Hz;(b) 200 Hz
Fig. 6. Displacement measurement results before and after compensation at different frequencies. (a) 100 Hz; (b) 200 Hz
表 1正交分量参数的仿真计算结果
Table1. Simulation results of orthogonal component parameters
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严利平, 周春宇, 谢建东, 陈本永, 楼盈天, 杨涛. 基于卡尔曼滤波的PGC解调非线性误差补偿方法[J]. 中国激光, 2020, 47(9): 0904002. Yan Liping, Zhou Chunyu, Xie Jiandong, Chen Benyong, Lou Yingtian, Yang Tao. Nonlinear Error Compensation Method for PGC Demodulation Based on Kalman Filtering[J]. Chinese Journal of Lasers, 2020, 47(9): 0904002.