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Two-level and two-period modulation for closed-loop interferometric fiber optic gyroscopes

机译:闭环干涉光纤陀螺仪的两级和两周期调制

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摘要

We propose and experimentally demonstrate a modulation technique for closed-loop interferometric fiber optic gyroscopes that improves its scale factor control and allows for the construction of gyroscopes with optimized angle random walk. The proposed two-level and two-period modulation is composed of two intercalated periods of the square wave modulation, one with amplitude of phi rad and the other with amplitude of 2 pi-phi rad. As in the two-level modulation, the angular velocity is obtained from the difference of consecutive output levels. Modulation depth error is obtained from the difference of the mean levels of the output from two consecutive periods. The proposed technique eliminates the limitation of square wave modulation: inefficient scale factor control at low angular velocities. Additionally, it requires a slower analog-to-digital converter than four-level modulation. (c) 2018 Optical Society of America
机译:我们提出并通过实验证明了用于闭环干涉纤维陀螺仪的调制技术,其提高其规模因子控制,并允许使用优化的角度随机步行构造陀螺仪。 所提出的两级和两阶段调制由两个平方波调制的两个插入周期组成,一个具有PHI RAD的幅度,另一个具有2个PI-PHI RAD的幅度。 与在两个级调制中一样,从连续输出电平的差异获得角速度。 从连续两个时段的输出的平均水平的差异获得调制深度误差。 所提出的技术消除了方波调制的限制:低角速度下的低效比例因子控制。 此外,它需要比四级调制更慢的模数转换器。 (c)2018年光学学会

著录项

  • 来源
    《Optics Letters》 |2018年第11期|共4页
  • 作者单位

    Fed Univ ABC Ctr Math Comp &

    Cognit BR-09210580 Santo Andre Brazil;

    Univ Estadual Campinas Sch Elect &

    Comp Engn Dept Sensors Instruments &

    Photon BR-13083852 Campinas SP Brazil;

    Univ Estadual Campinas Sch Elect &

    Comp Engn Dept Sensors Instruments &

    Photon BR-13083852 Campinas SP Brazil;

    Univ Fed Santa Catarina Software Hardware Integrat Lab BR-89211675 Joinville Brazil;

    Univ Estadual Campinas Sch Elect &

    Comp Engn Dept Sensors Instruments &

    Photon BR-13083852 Campinas SP Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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