基于不敏卡尔曼滤波平滑的再入弹头弹道系数提取

摘要

再入弹头超高速再人大气层是典型的非线性过程，并且再人过程存在扰动。针对系统的扰动，采用时变的弹道系数模型，针对弹头再入过程的非线性，建立了基于不敏卡尔曼滤波平滑法来提取弹道系数的模型，与不敏卡尔曼滤波法相比，改善了再入段目标弹道系数的提取精度。%The experience of reentry heads reentering atmosphere is a typical nonlinear process, in which there is perturbation. Because perturbation exists, the time-varying model of ballistic coefficient is adopted; because of non-linearity, unscented Kalman filtering smoothing is adopted. Compared to unscented Kalman filtering, the new method improves the precision of ballistic coefficient extraction.