船载经纬仪测角精度受自身轴系误差、惯导姿态误差以及未知船体变形的影响较大,为了减小这些因素的影响,提出了基于机载光源模拟恒星的经纬仪光轴空间指向标校方法。该方法将星敏感器和全球定位系统(GPS)载波相位差分技术进行有效融合,利用两个无人机进行伴飞,使得两个机载光源同时出现在标校望远镜视场内,从而建立两条高精度基线,使用双矢量定姿技术完成了标校望远镜光轴空间指向的计算,最终实现了经纬仪光轴在地平系下准确指向的标定和计算。仿真结果表明,通过优化参数配置,经纬仪光轴空间指向标校精度优于10″,该方法可以实现海上动态条件下经纬仪光轴空间指向的精确标定。

The angular accuracy of ship borne theodolite is significantly affected by its own shafting error, inertial navigation attitude error and unknown ship deformation. In order to reduce the influence of these factors, the optical axis spatial calibration method based on airborne light source simulating stellar theodolite is proposed. The proposed method effectively combines star sensor and carrier phase differential technique of global position system(GPS). Two unmanned aerial vehicles are used to carry out accompanying flight, which make two airborne light sources appear in the field of view of calibration telescope. Thus, two high precision base lines are built, and the calculation of optical axis space pointing of calibration telescope is finished by using double-vector altitude determination. Finally, the calibration and calculation of optical axis in the theodolite system accurately pointing at horizontal coordinate system are realized. The simulation results show that the optical axis space pointing calibration accuracy is better than 10″ by optimizing the parameter configuration. This method can realize the accurate calibration of theodolite optical axis space under the dynamic condition of the sea.