摘要
谐振式光纤陀螺(R-FOG)是基于Sagnac效应产生的谐振频率差来测量旋转角速率的一种新型光学传感器。利用数字调制、解调技术实现陀螺系统的闭环锁定,可以克服模拟电路的热漂移,使系统更加简单灵活。以谐振频率偏差作为研究对象,提出了基于一阶惯性环节的最简闭环锁定分析模型。利用该简化模型,对数字闭环系统中的频率反馈跟踪技术进行了研究,得到了在一定积分时间常数下环路的最佳增益系数,实现了环路的快速、稳定锁定,并在实验中得到进一步的验证。
Resonator fiber optic gyro （R-FOG） is a novel optical sensor whose resonant frequency is changed due to the Sagnac effect. The digital closed-loop operation can eliminate the thermal drift in analog circuits and it will make the R-FOG system more flexible. Taking the resonant frequency deviation as the research object, a simple analytical model for the closed-loop locking technique is presented based on one-order inertial loop operation. Frequency locking technique in the digital closed-loop operation system is then studied. The optimum loop gain is achieved under a certain integral time constant. Using above optimum parameters, the loop is locked quickly and stably. Furthermore, the analysis is verified by experiments.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2007年第6期814-819,共6页
Chinese Journal of Lasers
基金
高等学校博士学科点专项科研基金(20060335064)资助项目
关键词
光电子学
谐振式光纤陀螺
数字闭环系统
频率锁定技术
optoelectronics
resonator fiber optic gyro
digital closed-loop system
frequency locking technique
