潮湿大气中飞机尾流的多普勒特性分析  

Analysis of Doppler characteristics of Airplane Wake Vorteces in wet air

作　　者：刘俊凯[1] 王雪松[1] 王涛[1] 周彬[1] 李永祯[1] 

机构地区：[1]国防科技大学电子科学与工程学院综合电子信息系统研究所,长沙410073

出　　处：《信号处理》2009年第9期1443-1447,共5页Journal of Signal Processing

基　　金：总装备部武器装备探索研究项目(No7130620)

摘　　要：飞机尾流探测技术是航空安全等领域的重要研究课题。处于潮湿大气中的飞机尾流具有较强的雷达散射截面,但易受气象杂波的影响,需要根据其多普勒谱特性来提高脉冲多普勒雷达对尾流的可探测性。本文根据尾流的速度分布特性,获得了飞机尾流的径向速度谱。仿真表明,湿性尾流速度谱具有较明显的多普勒展宽特性,大飞机尾流的速度分布的标准差在几米每秒的量级。径向速度谱特性对于我们研究潮湿大气中飞机尾流的雷达探测具有指导意义。Remote detection of wingtip generated wake vorteces is important for hazard avoidance and airport capacity, wake vorteces in wet air has high RCS and is influenced greatly by weather clutter, so we need make use of Doppler spectrum characteristic to improve the feasibility of detecting airplane wake vorteees using Pulsed Doppler radar. Based on velocity distribution characteristics of wake votex, we acquire the radial velocity spectrum of wake vorteces. Simulation indicates that the spectrums of Wake Vorteces in wet air have obvious Doppler-spread characteristics, and standard deviation of velocity of large airplane is approximately several m/s. the spectrums help us to study detection technology of wake vortex.

关 键 词：尾流 潮湿大气 径向速度谱 多普勒展宽 

分 类 号：TN957.51[电子电信—信号与信息处理] V211.41[电子电信—信息与通信工程]