舰船捷联惯导系统粗对准方法研究

摘要

提出适合于舰船系泊、锚泊状态下的捷联惯性导航系统惯性凝固粗对准方法.在惯性凝固坐标系和惯性坐标系上对重力向量分别进行积分,并利用重力向量随地球旋转在惯性卒间的方向变化信息,粗略计算初始捷联姿态矩阵.该方法通过积分抵消掉舰船线性位移引入的干扰加速度,同时,避免了舰船姿态摇摆引入的干扰角速度.仿真分析表明:在舰船系泊、锚泊状态下,惯性凝固粗对准方法比较传统算法优势明显.%The inertial concretionary coarse alignment of strapdown inertial navigation system (SINS)is proposed for the condition that the vessel moor along the dock or on the sea. The gravity vector is integrated on the inertial frame and inertial concretionary frame respectively. And the method utilizes the direction variation of gravity vector for the earth rotation. The strapdown attitude matrix is estimated. The advantage of the proposed method is the disturbed accelerate aroused by liner displacement that are wiped off and rotation velocity by sway are avoided effectively. The simulation and analysis show that the proposed inertial concreted coarse alignment is superior to the conventional one.