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浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (1): 94-98+135    DOI: 10.3785/j.issn.1008-973X.2010.01.017
电子、通信与自动控制技术     
谐振式微型光学陀螺锁频精度分析
鲍慧强,毛慧,马慧莲,金仲和
（浙江大学 信息与电子工程学系,浙江 杭州 310027）
Precision analysis of frequency lock-in technique in resonator micro optic gyroscope
BAO Hui-qiang, MAO Hui, MA Hui-lian, JIN Zhong-he
(Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China)
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摘要：

在谐振式微型光学陀螺（R-MOG）系统中,为了减小由于光学器件受温度、应力等外界环境因素影响产生的各种噪声,提高环路锁频精度,在反馈回路中引入PI控制器取代一阶惯性反馈环节,建立反馈控制模型,对比分析PI控制器和一阶惯性反馈环节2种反馈方式对锁频精度的影响.利用PI控制器设置的反馈回路能够消除环路的阶跃响应稳态误差,从而降低温度等外界因素引起的环形腔互易性噪声的影响,提高环路锁频精度.进一步优化PI控制器参数,将优化设计的PI控制器应用于R-MOG系统,得到锁定环路阈值精度为30 Hz,对应环长为7.9 cm的微型环形腔可检测转动角速度为0.15°/s,并在该芯片构成的系统上观察到20°/s的陀螺响应.
Abstract:

In resonator micro optic gyro (R-MOG) system, optical elements, which are easily affected by environmentally-induced thermal and strain perturbations, induce various noises which restrict the precision of lock-in frequency. Instead of the first-order inertia link, proportion integration (PI) controllerwas adopted in the feedback loop to reduce these noises and then improve the lock-in precision. An analytical model was setup, and the influences of the first-order inertia link and PI controller on the accuracy of lock-in frequency were analyzed and compared. PI controller technique can remove the steady-state error of the step response, so it can reduce the influence of the reciprocal noises by the environmentally-induced thermal and strain perturbations. The parameters of PI controller were optimized through simulation. Using the optimized PI controller in R-MOG system, the threshold for the lock-in frequency of 30 Hz was achieved; which was equivalent to the rotation sensitivity of 0.15°/s for an R-MOG with a 7.9 cm length micro ring resonator chip. Gyro rotation signal at 20°/s is best demonstrated in the above mentioned R-MOG system．
出版日期: 2010-02-26
:  TN 815  
基金资助:

高等学校博士学科点专项科研基金资助项目（20060335064）.
通讯作者: 马慧莲，女，副教授.     E-mail: mahl@zju.edu.cn
作者简介: 鲍慧强（1987-），男，山东泰安人，硕士生，从事微弱信号检测研究.
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引用本文:

鲍慧强, 毛慧, 马慧莲, 等. 谐振式微型光学陀螺锁频精度分析[J]. J4, 2010, 44(1): 94-98+135.

BAO Hui-Jiang, MAO Hui, MA Hui-Lian, et al. Precision analysis of frequency lock-in technique in resonator micro optic gyroscope. J4, 2010, 44(1): 94-98+135.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2010.01.017    或    http://www.zjujournals.com/eng/CN/Y2010/V44/I1/94

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