一种新的动基座快速传递对准方案及其仿真研究

A New Approach to Transfer Alignment of Inertial Navigation System on Moving Base and It's Simulation

针对捷联惯导系统的动基座初始对准问题,提出了一种新的动基座快速传递对准方案。该方案采用速度+姿态变化量匹配,直接对主、子惯导导航坐标系之间的失准角进行估计,可以使航向失准角快速收敛。通过仿真,研究了注入噪声和测量噪声水平、机动运动强度和幅度、复合机动运动、载机运动方向等六个因素对对准性能的影响。结果表明:其对准性能取决于水平失准角的估计精度和速度;失准角的估计精度和速度与注入噪声水平和测量噪声水平、机动运动的强度和幅度有关;复合机动运动对对准性能有正反两方面的影响。

A new approach to transfer alignment for the initial alignment of Strapdown inertial navigation systems on moving base was put forward. It used velocity matching plus attitude change matching and directly estimated misalignment angular between the master and slave INS navigation coordinates. It could estimate azimuth angular fast. The influences of injected noise, measure noise, maneuver intensity and time, compound maneuver and plane motion direction on the approach performance were studied with simulation. It is shown that the approach performance depends on horizontal misalignment estimate speed and accuracy; injected noise, measure noise, maneuver intensity and time influence the approach performance; compound maneuver has advantageous and disadvantageous influences on the approach performance.