捷联惯导系统光学陀螺带宽不一致研究  

Study on Inconsistent Frequency Bandwidth of Optical Gyroscope in SINS

作　　者：郑永洁[1] 王勇[1] 曹梦丹 

机构地区：[1]北京控制工程研究所,北京100190

出　　处：《宇航学报》2015年第9期1024-1029,共6页Journal of Astronautics

基　　金：总装重点实验室基金(9140C59010830C59212);国家自然科学基金(61203075;61273153)

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。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.

关 键 词：捷联惯导系统 光学陀螺 带宽不一致 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]