自由节点样条函数平滑滤波技术

考虑了目标跟踪和航天测控中测量数据的平滑问题.提出了利用自由节点样条函数来改善多项式最小二乘滤波器设计的模型和方法.用样条函数表示弹道,能改善目标机动时用多项式表示弹道引入的截断误差较大的缺点,提高弹道参数的估计精度.仿真计算结果表明该方法能显著改善目标机动时的运动参数估计精度.

Data Smoothing and Filtering Technique by Free Node Spline Function

In this paper,we discussed the smoothing problem in target tracking and aerospace measurement.A novel model based on free node spline function is put forward to improve the design of the polynomial least square filter.Compared with a polynomial expression of trajectory,the spline expression of the trajectory can make the truncation error decrease greatly.Thus the trajectory parameter estimation accuracy is enhanced accordingly.Simulation results show that this method can improve the parameter estimation accuracy notably when target is maneuvering.