光纤陀螺惯导稳定平台与旋转调制方法

光纤陀螺仪在随机误差方面表现出极佳的性能优势,但受限于其标度因数不理想的现实。针对航海用长航时、高精度光纤陀螺惯导系统的使用需求,设计了基于光纤陀螺数字信号实现载体三维角运动隔离的同时完成惯性测量装置的旋转调制功能,可有效减小光纤陀螺标度因数误差与载体运动角速度的耦合误差,同时充分发挥光纤陀螺随机游走小的精度优势。理论仿真验证了光纤惯导稳定平台加旋转调制方法的优越性和可行性,为光纤陀螺惯导系统在高精度导航领域中的应用提供了技术基础。

Triaxial Motion Isolation and Rotation Modulation Method Based on Fiber-Optic Gyro Inertial Navigation System

As fiber-optic gyro has the advantage in random error and disadvantage in scale factor, to meet the demand of long voyage time and high precision performance, based on the fiber-optic gyro digital signal control, the tri-axis angular motion isolation of the carrier is designed and the rotation modulation function of the inertial measurement device is completed. With this novel method, the scale factor error and the motion coupling error can be reduced effectively, meanwhile, the advantage of small random error of fiber-optic gyro can be brought in full play. The simulation results demonstrate the superiority and feasibility of this novel method which can provide the technical foundation for the development of fiber-optic gyro inertial navigation system in high precision field.