消除FOG—ARW对初始对准影响的研究

光纤陀螺(FOG)作为光学惯性敏感器,与传统机械陀螺相比,具有角度随机游走(ARW)等一些特有的性能指标,ARW对导航系统性能具有重要影响。从光纤陀螺的光路、电路结构分析随机游走产生的机理,并从数学的角度阐述角度随机游走的定义;分析角度随机游走对初始对准的影响;提出利用卡尔曼滤波器有效消除角度随机游走对初始对准影响的方案并通过仿真验证了此方案的有效性。

Research on Eliminating Influence of FOG Angle Random Walk on Initial Alignment

The fiber optic gyro(FOG),working as an optics inertial sensor,has special performance parameters comparing with traditional mechanism gyro.One of these parameters like angle random walk(ARW) is important to performance of FOG navigation system.Principle of ARW was analysed basing on the electrocircuit and optical circuit of FOG.Definition of ARW was described in mathematical mode.The influence of ARW in alignment was analysed.Kalman filter was used to eliminate this influence,and the effect of this means was illustrated by simulation results.