Application of over modulation technique in fiber optic gyroscope north-seeking

被引：1
作者：
Zhou, Yi-Lan [1 ]
机构：
[1] College of Optical Science and Engineering, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2015年 / 49卷 / 09期
关键词：
4-position; Fiber optic gyroscope (FOG); North-seeking; Optimum modulation phase; Over modulation; Random walking coefficient (RWC);
D O I：
10.3785/j.issn.1008-973X.2015.09.028
中图分类号：
学科分类号：
摘要：
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. ©, 2015, Zhejiang University. All right reserved.
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页码：1817 / 1820
页数：3
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