一种提高捷联惯导系统动基座初始对准精度的方法

捷联惯导系统初始对准精度直接影响系统导航精度，以适用于动基座的惯性凝固系粗对准方法为基础，针对船载设备动基座机动条件，通过实际数据分析，提出了一种粗对准方案，在相同的载体运行条件下，对减小粗对准误差，进而提高导航精度有一定帮助。相对于原粗对准方法，通过试验仿真验证，粗对准精度均有所提高，在此基础上初始对准后，1h导航定位误差从2nmil提高到约0.45nmil。

A Kind of Method on Moving Base Initial Alignment for SINS

Initial alignment accuracy of strapdown inertial navigation system (SINS) has a direct impact on navigation accuracy. Based on a inertial concretionary coarse alignment method suitable for moving base, the coarse alignment scheme is proposed to reduce coarse alignment error under the same carrier operation condition according to the maneuvering condition of moving base of ship-borne equipment. It is helpful to improve the accuracy of navigation. Compared with the original coarse alignment method, the precision of coarse alignment is improved by simulation. Using this initial alignment method, the 1h navigation and positioning error is increased from 2nmil to 0.45nmil.