CAJ | 학술논문

传统参数辨识双位置对准方法绕方位轴转动90°构成第二位置，不是最优方案。改进方法绕方位轴转动180°构成最优双位置，并采用递推最小二乘进行参数辨识，计算量小，适合实时解算。采用光纤捷联惯导实测数据进行半物理仿真试验表明，改进方法10 min的方位对准精度优于1'，水平对准精度可提高一个数据量级，并且收敛速度得到明显改善。
전통삼수변식쌍위치대준방법요방위축전동90°구성제이위치，불시최우방안。개진방법요방위축전동180°구성최우쌍위치，병채용체추최소이승진행삼수변식，계산량소，괄합실시해산。채용광섬첩련관도실측수거진행반물리방진시험표명，개진방법10 min적방위대준정도우우1'，수평대준정도가제고일개수거량급，병차수렴속도득도명현개선。
The classic two-position parameter identification alignment method, which forms the second position by 90° rotation around the azimuth axis, is not optimal, while the improved method with 180° rotation is an optimal solution. The method identifies the concerned parameters by recursive least squares (RLS) algorithm, and its low computational complexity is very suitable for online solver. The effectiveness of proposed method is verified through semi-physical simulation experiments with the measured data of the fiber optic gyroscope (FOG) strapdown navigation system (SINS). The results show that after 10 min alignment, the azimuth misalignment error is less than 1′, and the level alignment accuracy is increased by one order of magnitude. Furthermore, the convergence speed can be improved obviously.