旋转式光纤陀螺寻北仪研究  

Research on Rotating FOG North-Finder

作　　者：徐海刚[1] 郭宗本[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院导航系,北京100091

出　　处：《压电与声光》2010年第1期38-41,共4页Piezoelectrics & Acoustooptics

基　　金：国家"九八五"基金资助项目(222105)

摘　　要：基于光纤陀螺和旋转调制技术的优点,提出一种单陀螺寻北仪。采用1个单轴光纤陀螺、2个石英加速度计和旋转机构组成系统,寻北同时还可得到具有一定精度的纬度信息。给出了寻北原理公式,基于递推最小二乘法开发了实用的算法,以消除陀螺漂移和噪声的对寻北精度的影响。通过误差分析对寻北精度进行理论估计,指出影响寻北精度的重要因素是陀螺漂移的不稳定性并使用光纤陀螺测试数据进行半物理仿真。仿真结果表明,3 min内方位角估计值进入0.1°误差带,重复性精度可达4′。A single gyro north-finder was proposed based on FOG and the rotation-modulation technology. The single gyro north-finder system consists of one FOG and two aeeelerometers with rotation table, which realizes the north-finding as well as produces the incidental information of local latitude. Basic theory was presented, and applied algorithm was developed based on the reeursive least square to reduce the effect of the gyro drift and noise on the accuracy of the north-finding. Precision of north-finding was estimated by error analysis which concludes that the most important error source is instability of gyro drift. Simulation using test data of FOG was carried out which showed that the north information with fluctuation within 0. 1°and repeatability of bitter than 4＇was available in 3 min.

关 键 词：光纤陀螺 寻北仪 旋转调制 递推最小二乘 

分 类 号：TN384[电子电信—物理电子学] V241.622[航空宇航科学与技术—飞行器设计]