| 基于随机共振的数字闭环光纤陀螺死区现象抑制 |
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| 引用本文： | 王马华,朱光平.基于随机共振的数字闭环光纤陀螺死区现象抑制[J].中国惯性技术学报,2011,19(1). |
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| 作者姓名： | 王马华 朱光平 |
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| 作者单位： | 1. 淮阴工学院,电信系,淮安,223002;东南大学,先进光子学中心,南京,210096
2. 东南大学,先进光子学中心,南京,210096 |
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| 基金项目： | 国家自然科学基金(60977038); 教育部新世纪优秀人才支持计划(NCET-05-0465) |
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| 摘 要： | 为抑制数据闭环光纤陀螺中死区现象引致的非线性性,实验研究了随机共振效应对系统信噪比的影响。实验结果表明,以电阻热噪声作为原始噪声源,配合适当的电路设计,可获得带宽可调、零均值、正态分布的随机噪声;在陀螺闭环反馈环节中的A/D转换器前,引入相应随机噪声,利用二值量化系统的非线性性,基于随机共振效应,可以提高系统信噪比,将陀螺的死区阈值从0.37o/h降至0.15o/h。此外,对于给定的陀螺系统,噪声强度、带宽和采样频率的选择不同,抑制死区现象的效果亦不同。进一步的理论分析表明,该方法可以广泛适用于基于数字闭环结构的微弱信号检测系统。
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| 关 键 词： | 光纤陀螺 数字闭环 随机共振 死区现象 |
Attenuating dead-band nonlinearity in digital closed-loop FOG based on stochastic resonance effect |
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| WANG Ma-hua,ZHU Guang-ping.Attenuating dead-band nonlinearity in digital closed-loop FOG based on stochastic resonance effect[J].Journal of Chinese Inertial Technology,2011,19(1). |
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| Authors: | WANG Ma-hua ZHU Guang-ping |
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| Institution: | WANG Ma-hua1,2,ZHU Guang-ping2(1.Faculty of Electric and Electronics Engineering,Huaiyin Institute of Technology,Huaian 223001,China,2.Advanced Photonics Center,Southeast University,Nanjing 210096,China) |
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| Abstract: | For the sake of attenuating dead-band nonlinearity in digital closed resonant fiber-optic gyroscopes,the influence of stochastic resonance effect on the signal to noise(S/N) of the system is investigated.According to the experiments,the zero-averaged stochastic noise with normal probability distribution function and adaptable bandwidth could be produced,in which the thermal noise from a resistor is operated as initial noise source and processed by a suitable circuit.The S/N might be improved by stochastic r... |
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| Keywords: | FOG digital closed-loop stochastic resonance effect band-dead phenomena |
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