| 光纤陀螺方波调制误差的分析与抑制 |
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| 引用本文： | 金靖,潘雄,宋凝芳,张春熹.光纤陀螺方波调制误差的分析与抑制[J].光电子．激光,2008,19(4):430-433. |
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| 作者姓名： | 金靖 潘雄 宋凝芳 张春熹 |
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| 作者单位： | 北京航空航天大学,仪器科学与光电工程学院,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 基于光纤陀螺的调制-解调原理,讨论了调制方波的频率、相位、占空比和光纤环特征频率对方波调制误差的影响,推导出方波调制误差的数学模型.测量光纤环特征频率、调制方波频率、相位及其温度系数,分析了温度变化对方波调制误差的影响.提出了数字时域梳状滤波的解调方法,推导出消除方波调制误差的条件表达式.实验结果显示,数字时域梳状滤波可以使方波调制误差引起的偏置漂移减小到0.3°/h以下.
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| 关 键 词： | 光纤陀螺 调制误差 调制 解调 梳状滤波 |
| 文章编号： | 1005-0086(2008)04-0430-04 |
| 修稿时间： | 2007年4月4日 |
Analysis and suppression of square wave modulation errors in FOG |
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| JIN Jing,PAN Xiong,SONG Ning-fang,ZANG Chun-xi.Analysis and suppression of square wave modulation errors in FOG[J].Journal of Optoelectronics·laser,2008,19(4):430-433. |
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| Authors: | JIN Jing PAN Xiong SONG Ning-fang ZANG Chun-xi |
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| Institution: | JIN Jing,PAN Xiong,SONG Ning-fang,ZANG Chun-xi(School of Instrument Science , Opto-electronics Engineering,Beijing University of Aeronautics , Astronautics,Beijing 100083,China) |
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| Abstract: | Based on the principle of square wave modulation and demodulation in fiber optic gyroscope(FOG),the effects of the square wave frequency,phase and duty cycle and the fiber coil eigenfrequency upon square wave modulation errors were discussed.The temperature coefficients of the fiber coil eigenfrequency and square wave frequency,duty cycle and phase were measured by using a lock-in amplifier.The bias drift of FOG due to the square wave modulation errors was analyzed at different temperatures.A digital time-d... |
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| Keywords: | fiber optic gyroscope(FOG) modulation errors modulation demodulation comb filter |
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