自适应滤波技术在光纤陀螺信号处理中的应用研究

Research on the Practical Application of the Adaptive Filter Technology in the IFOG Data Processing

光纤陀螺输出信号中的随机噪声的来源是不可去除的,并且每次开机时的噪声特征都不尽相同,尤其是随机噪声中的角度随机游走,直接影响到光纤陀螺短期内的精度,增加了初始对准结果的不确定性。为了减小这种不利影响,保证系统的对准精度,对光纤陀螺信号后期处理过程中采用前向线性预测(FLP)滤波技术设计了一种基于LMS算法的自适应滤波器,有效地抑制了随机噪声对对准结果的影响。

The original of random noisef in the fiber optic gyro output can not be removed,and the noise characters are different at every time when FOG is power on,especially the angle random walk, affects the short-term precision of FOG directly, and increases the uncertainty of alignment results. Paper designes a adaptive filter based on the LMS arithmetic using the FLP technology in the later data processing to reduce the disadvantageous affection,and guarantee the alignment precision.it restrains the random noise's affection on the alignment result effectively.