为了实现光纤陀螺的工程化,对数字滤波器的结构进行了改进,提出了一种多级抽样率转换器(SRC)与梳状带阻滤波器相结合的滤波算法。把闭环光纤陀螺的信号处理系统分为环内和环外两个部分,环外输出使用了加凯泽-贝塞尔窗的FIR滤波器。介绍了改进算法的优点,给出了新算法的实现方法。使用MATLAB对算法进行了仿真实验。结果表明,改进算法可明显地提高数字信号的处理效率,可保证在采样频率变换的过程中有用信号不会产生混叠,提高了光纤陀螺的精度。 In order to realize the engineering of FOG, the structure of the digital filter is improved. A filtering algorithm based on multi-level sampling rate converter (SRC) and comb band rejection filter is proposed. The closed-loop fiber optic gyros signal processing system is divided into two parts inside and outside the ring, outside the ring output using the Kaiser - Bessel window FIR filter. The advantages of the improved algorithm are introduced, and the method to realize the new algorithm is given. The algorithm is simulated by MATLAB. The results show that the improved algorithm can obviously improve the processing efficiency of the digital signal and ensure that aliasing will not occur in the useful signal during the sampling frequency conversion and improve the accuracy of the FOG.