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光纤陀螺数字相位斜波频繁复位抑制算法

宋凝芳 刘鹏程 潘雄 王夏霄 张少博

宋凝芳, 刘鹏程, 潘雄, 等 . 光纤陀螺数字相位斜波频繁复位抑制算法[J]. 北京航空航天大学学报, 2017, 43(9): 1732-1737. doi: 10.13700/j.bh.1001-5965.2016.0662
引用本文: 宋凝芳, 刘鹏程, 潘雄, 等 . 光纤陀螺数字相位斜波频繁复位抑制算法[J]. 北京航空航天大学学报, 2017, 43(9): 1732-1737. doi: 10.13700/j.bh.1001-5965.2016.0662
SONG Ningfang, LIU Pengcheng, PAN Xiong, et al. Frequent reset suppression algorithm of digital phase ramp in fiber optic gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(9): 1732-1737. doi: 10.13700/j.bh.1001-5965.2016.0662(in Chinese)
Citation: SONG Ningfang, LIU Pengcheng, PAN Xiong, et al. Frequent reset suppression algorithm of digital phase ramp in fiber optic gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(9): 1732-1737. doi: 10.13700/j.bh.1001-5965.2016.0662(in Chinese)

光纤陀螺数字相位斜波频繁复位抑制算法

doi: 10.13700/j.bh.1001-5965.2016.0662
基金项目: 

国家自然科学基金 61333005

详细信息
    作者简介:

    宋凝芳   女, 博士, 教授; 主要研究方向:先进光纤传感和空间光电技术

    通讯作者:

    宋凝芳, E-mail:Songnf@buaa.edu.cn

  • 中图分类号: V241.5+9;U666.12+3

Frequent reset suppression algorithm of digital phase ramp in fiber optic gyroscope

Funds: 

National Natural Science Foundation of China 61333005

More Information
  • 摘要:

    针对光纤陀螺在小角速度测量时存在数字相位斜波频繁复位的问题,建立了调制增益漂移条件下复位相位误差模型,分析了数字相位斜波频繁复位的机理和产生的条件。证明了数字相位斜波频繁复位是产生死区的因素之一。提出了一种具有类似施密特触发器特性的数字斜波滞回复位算法,通过分离数字相位斜波正负向累加区间,抑制频繁复位及其引起的死区。实验结果表明,在调制增益变小1%时,采用滞回复位算法可将死区范围从测量噪声的3倍减小至1倍左右。

     

  • 图 1  方波偏置调制时闭环光纤陀螺简化模型[1, 3, 12-13]

    Figure 1.  Simplified model of closed-loop fiber optic gyroscope under square wave bias modulation[1, 3, 12-13]

    图 2  输入角速度为2 228 (°)/h时相位台阶与相位斜波仿真波形

    Figure 2.  Simulation waveform of phase step and phase ramp when input angular velocity is 2 228 (°)/h

    图 3  输入角速度为50 (°)/h时相位台阶与相位斜波仿真波形

    Figure 3.  Simulation waveform of phase step and phase ramp when input angular velocity is 50 (°)/h

    图 4  频繁复位时间占比与输入角速度的关系

    Figure 4.  Relationship between frequent reset time proportion and input angular velocity

    图 5  斜波频繁复位时相位斜波与相位误差仿真波形

    Figure 5.  Simulation waveform of phase ramp and phase error when ramp resets frequently

    图 6  滞回复位算法示意图

    Figure 6.  Schematic diagram of hysteresis reset algorithm

    图 7  调制增益未漂移时斜波滞回复位仿真

    Figure 7.  Ramp hysteresis reset simulation with no modulation gain drift

    图 8  调制增益变大时斜波滞回复位仿真

    Figure 8.  Ramp hysteresis reset simulation when modulation gain largens

    图 9  调制增益变小时斜波滞回复位仿真

    Figure 9.  Ramp hysteresis reset simulation when modulation gain lessens

    图 10  调制增益分别变大、变小1%时输入-输出关系

    Figure 10.  Relationship between input and output when modulation gain largens or lessens by 1%

    图 11  调制增益变小1%时采用滞回复位算法的输入-输出关系

    Figure 11.  Relationship between input and output with hysteresis reset algorithm when modulation gain lessens by 1%

    表  1  实验所用光纤陀螺设计参数

    Table  1.   Design parameters of experiment fiber optic gyroscope

    参数 设计值
    Ks/s 0.551 6
    KD/(LSB·rad-1) 998.4
    KF/(rad·LSB-1) 1.92×10-4
      注:LSB(Least Significant Bit)—最低有效位。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-08-15
  • 录用日期:  2016-11-11
  • 刊出日期:  2017-09-20

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