基于惯性系的双轴旋转式惯导系统转位方法

针对双轴旋转式惯导系统中不能自动补偿标度因数误差与地球自转耦合误差的问题，提出了一种改进的转位方法。该方法不增加转轴数目，通过补偿地球自转在转轴平面的投影抑制耦合误差项，计算结果表明该方法适用于激光陀螺惯导系统和光纤陀螺惯导系统。利用改进的转位方法对双轴旋转式惯导系统进行仿真，仿真结果验证了该方法的可行性。研究结果为双轴旋转式惯导系统的工程设计和改进提供了一定的理论支持。

Indexing Method for Dual Axis Rotation INS Based on the InertialCoordinate System

Considering that the coupling error between the scale factor error and the Earth rotation cannot be automatically compensated in the dual axis rotation inertial navigation system, an improved indexing method is proposed in this paper. Without adding rotating shaft, this method restrains the coupling error by compensating the Earth rotation in the plane of the rotating shaft, mathematical analysis indicates that this method is suitable for laser gyroscopes and fiber optic gyroscope. Computer simulation results illustrate the efficiency of this improved indexing method. The research provides certain theoretical support for engineering design and modification of dual axis rotation inertial navigation system.