捷联惯性+星光修正组合导航研究

针对捷联惯性导航系统的初始对准误差所造成的导航误差,提出了捷联惯性+星光修正组合导航方案。利用光学导引头得到的星体观测值,估计初始对准误差,进而修正捷联惯性导航的姿态角、速度和位置。推导了捷联惯性+星光修正组合导航算法,得到了初始对准误差的估计公式和速度、位置的修正矩阵,并通过仿真分析证实了方案的可行性和算法的有效性。

Study of integrated strap-down inertial/star correcting navigation system

To correct guidance error due to the initial alignment error,a scheme of integrated strap-down inertial/star correcting navigation system is proposed,which utilizes star measurement data acquired by the optical seeker,to estimate the error of initial alignment and to correct the error of attitude angle,velocity and position of the strap-down inertial navigation system.The algorithm of integrated strap-down inertial/star correcting navigation system is educed.The equation to estimate the error of initial alignment and the modification matrix to offset the corresponding error of velocity and position are obtained.The results of computer simulation show that the proposed system is feasible and the algorithm is effective.