第44卷第6期2023年6月兵工学报ACTAAＲMAMENTAＲIIVol．44No．6Jun．2023DOI:10．12382/bgxb．2022．0119基于滑动多周期FFT的调频引信抗扫频干扰方法周文，郝新红，董二娃，陈彦君(北京理工大学机电动态控制重点实验室，北京100081)摘要:针对调频引信快速傅里叶变换(FFT)谐波包络提取方法对抗扫频干扰效果差的问题，提出一种滑动多周期FFT处理方法。在分析扫频干扰作用下调频引信的失效机理的基础上，提出通过多周期FFT进行回波能量的相干积累，实现对干扰的有效抑制，并在相邻处理窗口间滑动更新处理数据，进一步提取预定炸高对应的差频谐波包络进行门限判决。仿真及实测结果表明:滑动多周期FFT处理方法能在扫频干扰下有效提取目标谐波包络特征，相较于传统单周期FFT处理方法，显著改善峰值旁瓣比，提高了调频引信抗扫频干扰的能力。关键词:调频引信;扫频干扰;相干积累;谐波包络;峰值旁瓣比中图分类号:TJ43+4.1文献标志码:A文章编号:1000-1093(2023)06-1744-10收稿日期:2022-03-02基金项目:国家自然科学基金项目(61871414);国防科技基础加强计划项目(2019-JCJQ-ZD-324)Anti－FrequencySweepingJammingMethodforFMFuzeUsingSlidingMulti－cycleFFTZHOUWen，HAOXinhong，DONGErwa，CHENYanjun(ScienceandTechnologyonElectromechanicalDynamicControlLaboratory，BeijingInstituteofTechnology，Beijing100081，China)Abstract:Thisstudyproposesaslidingmulti-cyclefastFouriertransform(FFT)processingmethodtoaddresstheproblemofpoorperformanceoftheFFTharmonicenvelopeextractionmethodusedinFMfuzeunderfrequencysweepingjammingconditions．Theproposedmethodaimstoachieveeffectiveinterferencesuppressionbycoherentlyaccumulatingechoenergythroughmulti-periodFFTprocessing．Theprocessingdataisupdatedbyslidingbetweenadjacentprocessingwindows，andthedifferencefrequencyharmonicenvelopecorrespondingtothepredeterminedblastheightisfurtherextractedforthresholdjudgment．Thesimulatedandmeasuredresultsshowthatcomparedwithtraditionalsingle-cycleFFTprocessingmethod，thenewmethodcaneffectivelyextractthetargetharmonicenvelopecharacteristicsunderfrequencysweepingjamming，significantlyimprovethepeak-to-sideloberatio，andenhancetheanti-frequencysweepingjammingperformanceofFMfuze．Keywords:FMfuze;frequen...
