基于梳状滤波器的光纤陀螺尖峰干扰抑制方法

Peak interference suppression method of Fiber Optic Gyroscope based on comb filter

针对光纤陀螺尖峰干扰引起的解调误差问题,提出了一种基于梳状滤波器的光纤陀螺尖峰干扰抑制方法。首先,介绍了光纤陀螺尖峰干扰产生的原因和梳状滤波器的原理;然后,通过Matlab仿真,验证了梳状滤波器对尖峰干扰有良好的抑制效果;最后,根据梳状滤波器原理,基于现场可编程门阵列设计了一种优化的梳状滤波器,并与采用模拟开关抑制尖峰干扰的方法进行性能比较。实验结果表明,此方法可有效抑制光纤陀螺输出信号中的尖峰干扰,相比于传统基于模拟开关的尖峰干扰抑制方法,陀螺精度提高约12.74%。该研究对高精度光纤陀螺的性能提升具有重要参考价值。

Aiming at the demodulation error caused by the peak interference of Fiber Optic Gyroscope(FOG),a peak interference suppression method of FOG based on comb filter is proposed.Firstly,the causes of peak interference in FOG and the principle of comb filter are introduced.Then,through Matlab simulation,it is verified that the comb filter has a good suppression effect on peak interference.Finally,according to the principle of comb filter,an optimized comb filter is designed based on field programmable gate array,and the performance is compared with the method of using analog switch to suppress peak interference.The experimental results show that this method can effectively suppress the peak interference in the output signal of FOG.Compared with the traditional peak interference suppression method based on analog switch,the accuracy of gyroscope is improved by about 12.74%.This research has important reference value for the performance improvement of high-precision FOG.