空中点目标机动模式的双色比特征空间特性及辨识  

Dual-Color-Ratio-Feature Spatial Characteristics and Recognition of Aerial Point Target Maneuvering Modes

作　　者：寇添 周中良[1] 刘宏强 杨远志 阮铖巍 Kou Tian;Zhou Zhongliang;Liu Hongqiang;Yang Yuanzhi;Ruan Chengwei(Aeronautics Engineering College,Air Force Engineering University,Xi'an,Shaanxi 710038,China;No.95910 Troop,People’s Liberation Army,Jiuquan,Gansu 735305,China)

机构地区：[1]空军工程大学航空工程学院,陕西西安710038 [2]中国人民解放军95910部队,甘肃酒泉735305

出　　处：《光学学报》2018年第12期25-35,共11页Acta Optica Sinica

基　　金：国家自然科学基金(61172038).

摘　　要：为了根据光谱特征维度对点目标机动模式进行辨识,建立了点目标机动模式与光谱信号的映射关系,研究了目标机动过程中观测方向点目标的多光谱辐射特性。提取多光谱辐射信号特征,构建了双色比特征空间模型。利用高斯混合模型的聚类方法,深入分析了双色比特征空间的迁移和可分性特性,得到了点目标不同机动模式特征子空间迁移矢量和相邻矢量夹角余弦的变化规律,并得到特征子空间可分的最小姿态角变化量Δα=6.25°,可分距离阈值Dth=2.6,这为辨识点目标机动模式提供了依据。根据双色比特征子空间的特性,提出了基于时序特征子空间的点目标机动模式辨识方法,仿真验证结果表明,该方法简单可行,对点目标的机动模式辨识具有较高的灵敏性和可分性,这对获取超视距作战环境中点目标的机动信息具有重大意义。To recognize the point target maneuvering mode from the spectral characteristic dimension,the mapping relationship between the point target maneuvering mode and the spectral signals is built,and the multi-spectral radiation characteristics of point target with a maneuvering status in the direction of observation are investigated.The features of multi-spectral radiation signals are extracted to establish a dual-color-ratio-feature spatial model.The clustering method based on the Gaussian mixture model is used to analyze deeply the features of migration and separability of the dual-color-ratio-feature space.The migration vectors of feature sub-space of different maneuvering modes and the change of the cosine of adjacent vector angle are obtained.In addition,the smallest attitude angle change of feature sub-space and the separable distance threshold are obtained as Δα =6.25°and Dth =2.6,respectively.It provides the basis and feasibility for the recognition of point target maneuvering modes.According to the characteristics of dual-color-ratio-feature sub-space,a method for the recognition of point target maneuvering modes based on sequential-feature sub-space is proposed,which is verified by simulation as simple and feasible as well as possesses high sensitivity and separability in the recognition of point target maneuvering modes.These results have great significance for the acquisition of point target maneuvering information in the beyond-visual-range air combat.

关 键 词：探测器 红外辐射 双色比特征 高斯混合模型 机动模式辨识 

分 类 号：TN215[电子电信—物理电子学]