摄动条件下空间目标天基光学跟踪方法研究

该文针对摄动条件下的空间目标天基光学监视跟踪问题，引入UT变换和混合坐标系，在直角坐标空间内采用UT变换完成目标运动状态预测和预测协方差计算并考虑摄动因素影响，在修正球坐标空间内实现状态滤波更新，提出混合坐标SPKF跟踪方法，可避免EKF线性截断误差影响并增强跟踪滤波稳定性。仿真结果表明，在密集采样和稀疏测量条件下该方法在收敛性和稳健性上均具有优势。

Space Object Tracking with Perturbation in Space-based Optical Surveillance

To solve the problem of the passive tracking of the space objects with perturbation in space-based optical surveillance, the hybrid coordinates SPKF method is put forward. The Unscented Transformation (UT) and hybrid coordinates are introduced to avoid the influence of the linearization error and enhance the robustness of the tracking filter. The state prediction is performed in Cartesian coordinates utilizing UT and the perturbation influence could be considered at the same time, then the filter updating procedure is performed in modified sphere coordinates. Simulation results indicate that this approach has more advantage on rapidity of convergence and stability under the condition of the dense or sparse measurements.