基于多重分形分析的核爆与雷电电磁脉冲识别  

Discrimination of nuclear explosion and lightning electromagnetic pulses using multi-fractal analysis

作　　者：祁树锋[1] 李夕海[1] 韩绍卿[1] 冯军[1] 陈蛟[1] 刘代志[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《振动与冲击》2013年第7期8-10,16,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(40974037);中国博士后科学基金面上资助(201150M1554);中国博士后科学基金特别资助(2012T50882)

摘　　要：据核爆与雷电电磁脉冲信号非平稳、非线性特点,对NMEP与LEMP信号进行多重分形分析,计算二者多重分形广义维数D2～D8及广义维数变化率。分析发现广义维数变化率能反映核爆、雷电不同的产生机理,与广义维数相比,用广义维数变化率作为特征,对NEMP与LEMP识别率更高、更稳定、更有效。Here, the discrimination of nuclear explosion and lightning electromagnetic pulse was studied using multi-fractal analysis, these EMP signals usually have nonstationary and nonlinear characteristics. The muhi-fractal generalized dimensions D2 -Ds and their variation ratios for nuclear explosion and lightning electromagnetic pulses were calculated. Through analysis, it was found that the rates of change of generalized dimensions can reflect the different mechanisms of nuclear explosion and lightning; the discrimination of NEMP and LEMP based on the rates of change of generalized dimensions is more effective and more stable than that based on generalized dimensions.

关 键 词：核爆电磁脉冲 雷电电磁脉冲 识别 多重分形 广义维数 

分 类 号：TN911.73[电子电信—通信与信息系统]