Unscented Kalman滤波用于再入飞行器跟踪

本文引入Unscented Kalman滤波用于再入飞行器跟踪。Unscented Kalman滤波通过设计少量的σ点，并计算这些σ点经由非线性函数的传播，从而获得滤波值基于非线性状态方程的更新。在应用中，由于Un-scented Kalman滤波无需象广义Kalman滤波那样求动力学系统函数和观测系统函数关于状态向量的导数。给计算带来了极大的方便。

Unscented Kalman Filtering for Reentry Vehicle Tracking

This paper introduces Unscented Kalman Filtering (UKF) into reentry vehicle tracking. In Unscented Kalman filtering, the updating of the filtering based on the nonlinear state space equation is realized by designing a few sigma points and calculating the propagation of these sigma points via non linear functions. In practice, UKF has great convenience in computing, because it does not have to get the complicated derivative operation which cannot be avoided in the ordinary extended Kalman filtering (EKF).