多声源时延估计误差分析  

Error Analyze of Time-Delay Estimation on Multi-Source Environment

作　　者：刘向东[1] 张河[1] 程翔[1] 

机构地区：[1]南京理工大学机械工程学院

出　　处：《弹箭与制导学报》2004年第S8期387-389,共3页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对理想声场中两声源频率相同或相近时,分析了合成波的拍现象对声探测系统的时延估计引起的误差及影响因素。分析结果表明时延估计呈周期性波动,波动的频率与两声源合成波的拍频相同,波动的幅度与拍频频率、两声源的幅值比有关。窄带滤波器在一定条件下可以使时延误差满足系统要求,这就为由多个反直升机雷构成的雷场处理多目标莫定了基础。The time-delay estimation error and the influence factors caused by beat phenomenon of resultant wave from two sound sources are analyzed when the two sound sources have the same or approximate frequency in perfect sound field.The analyse results show that the curve of time-delay changes periodically and the frequency is the same as that of beat,the amplitude is relative to the beat frequency and the amplitude ratio of two sound sources.The narrowband filter can decrease the time-delay error to meet the system require under certain condition.This lays the foundation of solving the problem with the mine field formed from some anti-helicopter mine.

关 键 词：反直升机冒 多声源 时延估计 仿真 

分 类 号：TB52[理学—物理]