基于捷联惯导姿态的外测跟踪部位修正方法

为在外测数据处理中获取更高精度目标部位修正结果,解决已知目标几何尺寸难以精确修正的问题,提出采用捷联惯导系统姿态修正跟踪部位的方法.根据捷联惯导系统遥测四元数信息计算姿态旋转矩阵,利用外测处理中各个参照坐标系的相互关系,修正垂线偏差的影响,实现跟踪部位位置参数保精度修正.通过测试场景仿真计算,与常用速度矢量修正法进行比较、验证,结果表明姿态修正方法精确可行、结果正确,满足数据处理的精度要求和结果评定需要.

Correction method of trajectory tracking position based on attitude of strapdown inertial navigation system

In the flight test of post data processing of trajectory for obtaining higher precision of tracking position correction results, the correction method was put forward by using the attitude rotation matrix from strapdown inertial navigation system, to solve the problem that is difficult to accurately correct with the known size of target tracking correction parts. According to the quaternion information extracted from telemetry data of the strapdown inertial navigation system, the rotation matrix was calculated to correct the tracking position parameters. Meanwhile, by using the relationships of coordinate systems in the testing and modifying the effect of vertical deflection, the parameter precision was good. According to the simulation of test scene, the data was compared and verified with the commonly used velocity vector correction method. The results show that the method is feasible based on the attitude, and its result was correct. Moreover, it achieved the accuracy of post data processing and met the outcome assessment requirements.