激光捷联惯导多矢量定姿法晃动基座粗对准

Multi-vector Attitude Determining Method for Coarse Alignment of Laser SINS on Swaying Bases

针对激光捷联惯导晃动基座下受载体运动干扰难以实现粗对准这一问题,提出了一种惯性系下基于多矢量定姿的粗对准方法。首先分析了基于双矢量定姿的惯性系粗对准算法的原理和不足,在此基础上推导了基于多矢量定姿的粗对准模型,并对新方法进行了仿真验证。结果表明,与传统双矢量定姿惯性系对准方法相比,采用多矢量定姿能更充分利用观测信息,有效抑制干扰运动对对准精度的影响,建立更准确的捷联矩阵,同时使对准结果具有更好的稳定性。

A novel multi-vector coarse alignment method of laser SINS in inertial frame is proposed to solve the problem that it is difficult to achieve coarse alignment because of the motion jamming of vehicles on swaying bases.The principle and shortcoming of double-vector based inertial coarse alignment are analyzed,and the alignment model based on multi-vector is established.Finally,the simulations are conducted to verify the new method,which show that compared with the traditional method,the proposed algorithm can effectively eliminate the influence of motion jamming by fully taking advantage of the measurement data.As a result the DCM matrix can be acquired with better accuracy and stability.