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调频引信谐波时序检测抗干扰方法及实现
引用本文:孔志杰,郝新红,栗苹,闫晓鹏.调频引信谐波时序检测抗干扰方法及实现[J].北京航空航天大学学报,2018,44(3):549-555.
作者姓名:孔志杰  郝新红  栗苹  闫晓鹏
作者单位:北京理工大学 机电动态控制重点实验室, 北京 100081
基金项目:国防“973”计划(613196),国家自然科学基金(61673066)National Security Program on Key Basic Research Project of China(613196),National Natural Science Foundation of China(61673066)
摘    要:针对调频(FM)引信抗干扰能力差的问题,提出了调频引信谐波时序检测抗干扰方法,利用弹目交会过程中谐波时序特征,提高了调频引信抗调幅(AM)、调频和扫频干扰能力;设计了基于快速傅里叶变换(FFT)的调频引信谐波提取方案,通过对差频信号进行FFT获得谐波幅值,与现有谐波定距调频引信通过带通滤波器(BPF)获得谐波幅值相比,在保证同等定距精度的前提下,可以灵活选取谐波次数和谐波通道,利用谐波时序性提高调频引信抗干扰能力,同时易于实现炸高分挡。仿真及实测结果验证了本文方案的可行性,调频引信抗干扰成功率由16.7%提高到90%以上。 

关 键 词:调频(FM)引信    抗干扰    谐波时序检测    快速傅里叶变换(FFT)    差频信号
收稿时间:2017-04-13

Harmonic timing sequence detection anti-jamming method and its implementation for FM fuze
KONG Zhijie,HAO Xinhong,LI Ping,YAN Xiaopeng.Harmonic timing sequence detection anti-jamming method and its implementation for FM fuze[J].Journal of Beijing University of Aeronautics and Astronautics,2018,44(3):549-555.
Authors:KONG Zhijie  HAO Xinhong  LI Ping  YAN Xiaopeng
Institution:Science and Technology on Electromechanical Dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100081, China
Abstract:In order to improve the anti-amplitude-modulation (AM)-jamming,anti-frequency-modulation (FM)-jamming and anti-sweep-jamming performance of FM fuze,a harmonic timing sequence detection antijamming method is proposed using the timing sequence characteristics of harmonics during the projectile-target encounter.A harmonic extraction method based on fast Fourier transform (FFT) is designed,and the harmonic amplitude is obtained by FFT on the difference frequency signal.Compared with the harmonic extraction method through the band-pass filter (BPF) of the existing FM harmonic fuze,the harmonic number and harmonic channel can be flexibly selected,under the condition of the same ranging precision.The better antijamming performance and flexible ignition height are achieved using the harmonic timing sequence detection.Simulation and experimental results verify the feasibility of the program and the anti-jamming success rate of FM fuze is improved from 16.7% to more than 90%.
Keywords:frequency-modulation (FM) fuze  anti-jamming  harmonic timing sequence detection  fast Fourier transform (FFT)  difference frequency signal
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