针对目前无源模拟技术无法实现目标动态电磁特征模拟的问题，提出了一种利用相位调制表面(phase-switched screen，PSS)进行空中 目标动态高分辨距离像(high resolution range profile，HRRP)特征可重构的模拟方法。以无人直升机旋翼为例，对旋翼的运动状态进行了建模，并详细分析了其动态HRRP特征。另 外，通过建立PSS的周期调制信号模型，详细分析了 PSS对雷达入射波的调控效果。在此基础上，提出了一种调制频率时变的PSS可重构模拟方法，该方法能够生成随时间变化的可控谐波分量，模拟产生的谐波分量与无人直升机旋翼的动态HRRP特征变化规律相似。通过仿真数据对比分析，调制频率时变的PSS可重构模拟方法能够实现无人直升机旋翼的动态HRRP特征模拟效果。
Reconfigurable simulation method for dynamic HRRP feature of air target
To solve the problem that the current passive simulation technology cannot realize the simulation of dynamic electromagnetic features of the target,a reconfigurable simulation method for dynamic high resolution range profile(HRRP)feature of the air target using the phase-switched screen(PSS)is proposed.Taking the unmanned helicopter rotors as an example,the motion state of the rotors is modeled,and its dynamic HRRP feature is analyzed in detail.In addition,the periodic modulation signal model of PSS is established,and its regulation effect on the radar incident waves is analyzed in detail.On this basis,a PSS reconfigurable simulation method with time-varying modulation frequency is proposed,which can generate time-varying controllable harmonic components.The distribution of harmonic components produced by the simulation is similar to the dynamic HRRP feature of the unmanned helicopter rotors.Through the comparative analysis of the simulation data,the PSS reconfigurable simulation method with time-varying modulation frequency can achieve the simulation effect for the dynamic HRRP feature of the unmanned helicopter rotors.
dynamic feature simulationphase-switched screen(PSS)time-varying modulation frequencyhigh resolution range profile(HRRP)
万方数据
维普
