测试技术学报2018，Vol.32Issue(2)：150-155,6.DOI:10.3969/j.issn.1671-7449.2018.02.011
应用于谐振式光学陀螺的数字低通滤波器设计
Design of the Digital Low Pass Filter Applied to Resonator Fiber Optic Gyroscope
摘要
Abstract
The paper reported an inertial digital low-pass filter for improving the SNR,eliminating the high frequency noise in the demodulation and reducing the FPGA resource share in the digital resonant optic gyro (ROG).The filter can meet the requirement of continuous low-pass cutoff frequency,adj ust-able order and low resource consumption of FPGA in ROG digital detection system at 40MHz high sam-pling rate.The function model of the inertial filter is theoretically analyzed.The digital realization process of the filter is shown.The function model inertia filter is analyzed theoretically,and the digital realization process of the filter is given.The amplitude and phase frequency curves are simulated and tested in the cut off frequencies of 194.38 Hz,0.189 Hz.Experiment results show that the digital filter has excellent amplitude and phase characteristics of frequency.The resource occupancy rate of FPGA is only 0.09%.Meanwhile,the order and cut-off frequency of inertial digital low-pass filter are easily ad-j usted.The inertial digital low-pass filter meet the design requirements of digital lock-in amplifier.关键词
谐振式光学陀螺/数字锁相放大器/数字低通滤波器/惯性滤波器Key words
resonator fiber optic gyroscope/lock-in amplifier/low pass digital filter/inertial filter分类
信息技术与安全科学引用本文复制引用
谌浩然,薛晨阳,张成飞,王颖,陶煜,郑永秋..应用于谐振式光学陀螺的数字低通滤波器设计[J].测试技术学报,2018,32(2):150-155,6.基金项目
国家自然科学基金杰出青年基金资助项目(51225504) （51225504）
国家自然科学基金资助项目(61640601) （61640601）
重点实验室基金——6142001041416200100中北大学校科研基金资助项目(XJJ2016030) （XJJ2016030）
