激光陀螺的插值FIR滤波硬件解调方法仿真分析  

A simulation analysis of demodulation for RLG signal by IFIR digital filter method

作　　者：张馗[1,2] 杨功流[1,2] 马仁冬 郑炜桢 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191 [2]惯性技术国防重点实验室,北京100191

出　　处：《舰船科学技术》2015年第8期149-152,共4页Ship Science and Technology

基　　金：国家自然科学基金资助项目(61340044);中央高校基本科研业务费专项资金资助项目(YWF-10-01-B30)

摘　　要：针对传统激光陀螺解调方法中存在较大运算量和时延问题,提出一种基于插值FIR滤波数字信号处理方案。在理论分析滤波器时延和运算量的基础上,阐述插值FIR滤波器的原理和优势;针对某型号激光陀螺,利用Matlab设计了插值FIR滤波器参数,并通过Quartus II中Mega Core IP核实现插值FIR滤波器定制;对于生成的模型在Simulink中利用DSP Builder对该滤波器进行仿真,完成静态试验验证。结果表明:经插值FIR滤波,高频分量峰值能从250降低到0.15左右,噪声功率谱衰减达60 d B;在保证信号线性相位的基础上,将运算量降低33%,减小了对硬件资源的需求。Focused on the problems of time delay and computation complexity,an interpolated finite impulse response（ IFIR） digital filter approach was purposed to improve the demerits of traditional finite impulse response（ FIR） digital filter in the case of noise attenuation for dithered ring laser gyroscope（ RLG）. by the tool of Matlab,the parameters of an IFIR filter was designed for a typical RLG; Based on Mega Core of Quartus II,a model of IFIR filter was customized; concentrated on the time delay and computation complexity,an experiment was done to test model of the filter. Results show that the highfrequency parts of filtered signal were decreased from 250 to 0. 15 and attenuated noise by 60 d B; under the foundation of the linear phase response,the computation complexity was declined to 33%.

关 键 词：激光陀螺 插值FIR 数字信号处理 Simulink DSP BUILDER 

分 类 号：U666.1[交通运输工程—船舶及航道工程]