| 捷联惯导系统光学陀螺带宽不一致研究 |
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| 引用本文： | 郑永洁,王勇,曹梦丹.捷联惯导系统光学陀螺带宽不一致研究[J].宇航学报,2015,36(9):1024-1029. |
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| 作者姓名： | 郑永洁 王勇 曹梦丹 |
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| 作者单位： | 北京控制工程研究所，北京100190 |
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| 基金项目： | 总装重点实验室基金（9140C59010830C59212）；国家自然科学基金（61203075，61273153） |
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| 摘 要： | 研究捷联惯导系统（SINS）三轴光学陀螺带宽不一致问题及解决方法。从光学陀螺传递函数入手，分析陀螺带宽不一致引起陀螺输出不同步，进而影响姿态更新精度的机理；推导出存在陀螺带宽不一致时姿态确定精度的理论估算方法，给出频带一致性指标要求的确定思路；提出通过插值和外推进行补偿的方法，提高了姿态确定精度。利用光纤陀螺和激光陀螺组合实测数据进行姿态解算，通过补偿减小了系统的姿态确定误差，提高了导航精度，验证了理论分析的正确性。
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| 关 键 词： | 捷联惯导系统 光学陀螺 带宽不一致 |
| 收稿时间： | 2014-10-11 |
Study on Inconsistent Frequency Bandwidth of Optical Gyroscope in SINS |
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| ZHENG Yong jie,WANG Yong,CAO Meng dan.Study on Inconsistent Frequency Bandwidth of Optical Gyroscope in SINS[J].Journal of Astronautics,2015,36(9):1024-1029. |
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| Authors: | ZHENG Yong jie WANG Yong CAO Meng dan |
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| Institution: | Beijing Institute of Control Engineering, Beijing 100190, China |
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| Abstract: | The inconsistent frequency bandwidth of optical gyros in a three-axis strapdown inertial navigation system (SINS)is studied. By using the transfer function of optical gyros, the relation between the frequency difference and the attitude error is derived, and a method to determine requirements for frequency bandwidth is given when choosing gyros. Moreover, a method to improve attitude determination accuracy is proposed by using linear interpolation or extrapolation compensation.Finally, by using a combination of fiber optic gyros and laser gyros for solving attitude, some experiments are carried out and the results verify that the theoretical analysis is correct. |
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| Keywords: | Strapdown inertial navigation system Optical gyroscope Frequency bandwidth inconsistency |
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