基于时域高频法的宽带近场回波仿真算法

针对宽带引信弹目交会多普勒回波的快速仿真需求,提出了一种基于时域高频法的宽带近场回波快速仿真算法和仿真流程。该算法将时域物理光学(TDPO)近场积分方程和时域面积分方程相结合,利用远场近似,推导得到导体目标的时域物理光学近场散射闭合表达式,避免了计算复杂的面积分,提高了仿真速度。同时,提出了基于时域高频法的宽带近场动态多普勒回波仿真流程,经一次计算便能够得到宽带的时域回波。仿真结果表明,采用该仿真算法和仿真流程可实现宽带引信动态交会多普勒回波的快速仿真,且通过与多普勒频率理论值的对比,验证了所提仿真算法和仿真流程的正确性。

Broadband Near-field Echo Simulation Algorithm Based on Time Domain High Frequency Method

A fast simulation algorithm and simulation process for broadband near-fieldecho based on time domain high frequency method were proposed to meet the fast simulationrequirements of broadband fuze missile-target encounter Doppler echo. This algorithmcombined the time domain physical optics (TDPO) near-field integral equation with the timedomain surface integral equation, and used far-field approximation to derive the TDPO nearfieldscattering closed form expression of the conductor target, avoiding complex surfaceintegral calculations and improving simulation speed. At the same time, a broadband nearfielddynamic Doppler echo simulation process based on time domain high frequency methodwas proposed, and the broadband time domain echo could be obtained through onecalculation. The simulation results show that this simulation algorithm and simulation process can achieve rapid simulation of broadband fuse dynamic encounter Doppler echo. Thecorrectness of the proposed simulation algorithm and simulation process has been verified bycomparing with the theoretical value of Doppler frequency.