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首页> 外文期刊>Optical engineering >Identifying Z-axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system
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Identifying Z-axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system

机译：使用光纤陀螺单轴旋转惯性导航系统中的方位测量识别Z轴陀螺漂移和比例因子误差

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摘要

In the fiber optic gyroscope (FOG) single-axis rotation inertial navigation system (SRINS), the Z-axis gyro drift (ε_z) dramatically limits its navigation precision and the Z-axis gyro scale factor error (SK_(Gz)) can cause greater navigation error because of the rotation process compared with the strap-down inertial navigation system. Hence, identification and compensation for the ε_z and SK_(Gz )are important in SRINS. An approach based on the azimuth error model of open-loop algorithm is proposed. This approach considers azimuth angle as a measurement and uses a least recursive square algorithm for identifying the ε_z and SK_(Gz). Compared with the traditional method, which takes velocity and position errors as measurements, the time required for identifying ε_z with the proposed method is only approximately 10 min, while the traditional method requires 6 h to 12 h. Experimental results from an SRINS with FOGs demonstrate that the accuracy of identifying the ε_z reaches 0.002°/h and that of the SK_(Gz )reaches 8 ppm in 10 min. The positioning accuracy of the SRINS improves greatly after the identification and compensation.
机译：在光纤陀螺（雾）单轴旋转惯性导航系统（SRINS）中，Z轴陀螺漂移（ε_Z）显着限制其导航精度和Z轴陀螺秤因子误差（SK_（GZ））可能导致与带式惯性导航系统相比，由于旋转过程，导航误差更大。因此，对ε_z和sk_（gz）的识别和补偿在srins中是重要的。提出了一种基于开环算法的方位误差模型的方法。该方法将方位角视为测量，并使用最小递归方算法来识别ε_z和sk_（gz）。与传统方法相比，采用速度和定位误差作为测量值，用所提出的方法识别ε_Z所需的时间仅为约10分钟，而传统方法需要6小时至12小时。雾烃的实验结果表明，鉴定ε_Z的准确性达到0.002°/ h，SK_（GZ）的10分钟达到8ppm。在识别和补偿后，SRINS的定位精度大大提高。

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  • 来源
    《Optical engineering》 |2017年第2期|024102.1-024102.10|共10页
  • 作者

    Lingcao Wang; Kui Li; Lei Wang; Jiaxin Gao;

  • 作者单位

    Beihang University School of Instrumentation Science and Opto-electronics Engineering Haidian District Beijing China;

    Beihang University School of Instrumentation Science and Opto-electronics Engineering Haidian District Beijing China Xi'an Research Institute of Surveying and Mapping State Key Laboratory of Geo-information Engineering Xi'an China;

    Beihang University School of Instrumentation Science and Opto-electronics Engineering Haidian District Beijing China;

    Beihang University School of Instrumentation Science and Opto-electronics Engineering Haidian District Beijing China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fiber optic gyroscope; single-axis rotation inertial navigation system; gyro drift; azimuth error model;

    机译：光纤陀螺仪;单轴旋转惯性导航系统;陀螺漂移;方位角错误模型;

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