利用SAR图像匹配的弹体定位新方法  

New method for missile positioning based on SAR scene matching

作　　者：梁毅[1] 李晴晴 孙昆 党彦锋[1] 丁金闪[1] LIANG Yi;LI Qingqing;SUN Kun;DANG Yanfeng;DING Jinshan(National Key Lab.of Radar Signal Processing,Xidian Univ.,Xi＇an 710071,China)

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2018年第6期1-6,共6页Journal of Xidian University

基　　金：海洋公益性行业科研专项经费资助项目(201405001)

摘　　要：在导引头末制导阶段,常采用景象匹配技术修正弹体飞行轨迹的位置偏差,而传统基于多普勒信息的定位方法对误差敏感,无法满足精确制导的需求.针对上述问题,提出一种新的弹体定位方法,通过构建以场景中任意点为北天东坐标系原点的定位几何模型,获取景象匹配后弹载合成孔径雷达图像中多特征点的位置信息;然后以对应的斜距信息构造非线性方程组,运用高斯牛顿-遗传混合算法解算出弹体实际位置,从而准确地对弹道修偏.During the final guidance stage, the position deviation of the missile flight trajectory is often corrected by scene matching technology, but traditional positioning methods based on Doppler information are sensitive to errors, which can not satisfy the requirement of accurate navigation. To solve this problem, a new method for missile positioning is proposed. First, the location information on multi feature points in the missile borne SAR image after scene matching is obtained by building a positioning geometric model of the arbitrary point as the image coordinate system origin. Then the nonlinear equations are constructed by corresponding slant range information. The actual position of the missile is calculated by the Gaussian Newton genetic hybrid algorithm, so that the trajectory deviation is corrected accurately.

关 键 词：弹载合成孔径雷达 高斯牛顿-遗传混合算法 多特征点 定位 

分 类 号：TN857.52[电子电信—信息与通信工程]