2023年2月第19卷第1期系统仿真技术SystemSimulationTechnologyFeb.,2023Vol.19,No.1半主动导引头倒置接收机建模仿真研究刘钊*,吴大祥,赵文龙,李苏杭,吕志新(上海机电工程研究所,上海201109)摘要:数字仿真技术已广泛应用在制导控制系统的设计中。目前导引头接收机的输出雷达误差信号只用比例系数K来代替,但是在低信噪比、超低空和群目标条件下,导引头雷达误差测量受到干扰,比例系数K无法反映实际情况,影响了结果的置信度,也限制了数字仿真的应用。本文旨在完善导引头接收机的数学模型,使之能够真实地模拟实际情况。本文以Matlab中的Simulink为仿真平台,建立了导引头接收机的数学模型,主要包括:一二中混频、三通道合一、AGC归一化比幅单脉冲测角以及AFC回路等模块。接收机最终输出为控制导弹所需的雷达误差(即视线角速率)和弹目多普勒频率。最后进行数字仿真,仿真结果与飞行试验结果一致,验证了所提导引头接收机数学模型的可靠性。关键词:导引头接收机;自动增益控制;速度跟踪环路;角跟踪环路ModelingandSimulationofSemi-ActiveRadarSeekerInvertedReceiverLIUZhao*,WUDaxiang,ZHAOWenlong,LISuhang,LVZhixin(ShanghaiElectro-MechanicalEngineeringInsititute,Shanghai201109,China)Abstract:Digitalsimulationtechnologyofguidanceandcontrolsystemhasbeenwidelyusedinthedesignofguidanceandcontrolsystem.TheoutputradarerrorsignalofseekerreceiverisonlyreplacedcurrentlybyaproportionalcoefficientK.Undertheconditionsoflowsignal-to-noiseratio,ultra-lowaltitudeandgrouptargets,theseekerradarerrorisinterfered.ThecoefficientKcannotreflecttheactualsituation,whichaffectstheconfidenceoftheresultsandalsolimitstheapplicationofdigitalsimulation.Thepurposeofthispaperistorefinethemathematicalmodeloftheseekerreceiver,sothatitcansimulatetheactualsituation.Inthismodel,SimulinkinMatlabisusedtomodelseekerreceiver,includingone-two-middlemixing,three-channelintegration,AGCnormalizedamplituderatiosingle-pulseanglemeasurementandtheAFCloop.Thereceiverfinallyoutputstheradarerror(thatis,thelineofsightangularrate)andtheDopplerfrequencyoftheprojectilerequiredtocontrolthemissile.Finally,thereceivermodelisaddedtotheguidanceandcontrolsystemforoverall...