摘要
根据天基光学监视特点,利用直角坐标系和修正极坐标系分别在状态外推和状态更新上的优势,并引入UT变换避免空间目标非线性运动方程线性化外推的截断误差影响,实现对空间目标在混合状态空间的三维被动跟踪滤波。仿真结果表明,该方法在收敛性和稳健性上更有优势。
Based on analysis of the characteristics of optical space surveillance and taking into consideration the advantages of Cartesian coordinates on state extrapolation and the modified polar coordinates on linear measurement innovation,a filter method using unscented transformation to avoid the influence of linearization errors is adopted to support tracking of space objects in mixed-state space.The corresponding tracking initiation based on constrained searching is also given.Simulation results indicate that this approach is preferable in speed of convergence and stability.
出处
《飞行器测控学报》
2009年第1期90-94,共5页
Journal of Spacecraft TT&C Technology
关键词
空间目标
天基光学监视
UT变换
跟踪
Space Object
Space-based Optical Surveillance
Unscented Transformation(UT)
Tracking
