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浙江大学学报(工学版)
浙江大学学报(工学版)
光学仪器工程     
过调制技术在光纤陀螺寻北中的应用
周一览
浙江大学 光电科学与工程学院,浙江 杭州310027
Application of over modulation technique in fiber optic gyroscope north seeking
ZHOU Yi lan
College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
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摘要：

针对光纤陀螺的寻北精度受测量噪声限制的问题,提出采用过调制技术提高光纤陀螺寻北精度的方案.以4位置寻北方法为例进行的理论和数值仿真分析表明:光纤陀螺的寻北误差与随机游走系数成正比.降低光纤陀螺的随机游走系数(RWC)可以等比例提升其寻北精度.过调制技术通过选择最佳调制相位对光纤陀螺的信噪比进行优化,可以有效降低光纤陀螺的随机游走系数.进行过调制前、后光纤陀螺的寻北实验,结果表明：过调制后光纤陀螺的随机游走系数降低程度与寻北精度提升程度相当,均约为30%,符合理论分析和计算结果,说明采用过调制技术可以有效提高光纤陀螺的寻北精度.
Abstract:

The scheme of improving the north seeking precision of fiber optic gyroscope (FOG) by over modulation technique was proposed in view of the problem that the north seeking precision of FOG is limited by measurement noise. Take 4 position north seeking method for example, the results of theoretical and numerical simulation analysis show that the FOGs north seeking deviation is proportional to the random walking coefficient (RWC). When the RWC decreases, the north seeking precision of FOG can be promoted by equal proportion. The over modulation technique can optimize the signal to noise ratio of FOG by choosing the optimum modulation phase and can reduce the FOGs RWC effectively. North seeking tests were carried out before and after over modulation, the results showed that after the over modulate, the reduction of RWC was about 30% and corresponded to the promotion of north seeking precision. The results of tests conform to the theoretical analysis and calculation results, which illustrates that north seeking precision of FOG can be effectively improved by the over modulation technique．
出版日期: 2015-10-15
:  V 241.5  
通讯作者: 周一览(1978-)，男，工程师，博士，从事光纤传感器及其系统研究. ORCID: 0000 0001 6124 9692     E-mail: naliyuohz@zju.edu.cn
作者简介: 周一览(1978-)，男，工程师，博士，从事光纤传感器及其系统研究. ORCID: 0000 0001 6124 9692,E-mail: naliyuohz@zju.edu.cn
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引用本文:

周一览. 过调制技术在光纤陀螺寻北中的应用[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008 973X.2015.09.028.

ZHOU Yi lan. Application of over modulation technique in fiber optic gyroscope north seeking. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008 973X.2015.09.028.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008 973X.2015.09.028    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I9/1817

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