火箭尾焰对高频回波的影响及其频域能量凝聚检测方法  

Effect of rocket flame on high-frequency echo and its frequency energy agglomerated detection method

作　　者：吴瑕[1] 陈建文[1] 鲍拯[1] 郭德阳[1] 

机构地区：[1]空军预警学院,三系重点实验室,武汉430019

出　　处：《物理学报》2014年第11期452-461,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61072132);中国博士后科学基金(批准号:2013M542541)资助的课题~~

摘　　要：针对火箭尾焰喷射出的大量物质消耗大气中电子密度以及干扰高频电磁波传播的问题,本文从分析火箭尾焰高频雷达回波特性入手,重点研究了尾焰电磁特性和对高频电磁波衰减的物理机理,分析了尾焰雷达散射特性与尾焰高频回波产生的时机.在此基础上,提出了一种尾焰回波频域能量凝聚的目标检测方法.通过仿真实验和理论分析,得到了火箭尾焰高频电磁回波与海拔高度、尾焰电磁特性、电波频率、入射角之间的关系,所提检测方法能够及时有效检测火箭目标,并降低虚警和漏警概率.According to the problem that the mass matter from rocket flame consumes the electron density in atmosphere and disturbs high-frequency electromagnetic wave propagation, based on the characteristic of high-frequency radar echo from rocket flame, this paper reports the physical mechanism of high-frequency electromagnetic wave attenuation and flame electromagnetic characteristics, and analyses the radar cross section characteristic of the flame and the procreant time of flame＇s high-frequency echo. Then the detection method of frequency energy agglomerated for flame is put forward. By simulation analysis and experimental observation, the relations among flame high-frequency echo, altitude, flame electromagnetic characteristic, electric wave frequency, angle of incidence are obtained. The detection method is reliable and can decrease false-alarm and missing-alarm.

关 键 词：火箭尾焰 等离子体 电磁特性 目标检测 

分 类 号：V556.6[航空宇航科学与技术—人机与环境工程]