FIR滤波器在光纤陀螺中的应用

Research on the practical application of the FIR filter in inter ferometric fiber optic gyroscope

光纤陀螺的研究主要分为光路和电路2个部分,电路部分中数字信号处理的算法影响整个光纤陀螺系统的精度.介绍了平滑滤波器和基于分布式算法的FIR滤波器的基本原理;采用Matlab工具箱中的fdatool设计了滤波器系数,并进行了仿真,仿真结果表明设计可靠、合理且满足设计要求;最后使用Verilog HDL语言实现了滤波器硬件电路.

The research on IFOG（ interferometric fiber optic gyroscope）can be divided into two sections： the optical path design and the electric circuit design. The arithmetic of digital signal processing affects the accuracy of IFOG. This paper introduces the fundamental principle of smoothing filter and FIR filter based on distributed arithmetic. The fdatool in Matlab toolbox was used to design the filter coefficients, and simulation was done. The results show that the design is reliable and reasonable, and meets the design requirement. The electric circuit of filter hardware was designed with the Verilog HDL.