射频仿真系统空域特性对导引头测角的影响  

Influence of Spatial Characteristics of Antenna Array on Angle Measurement in RFSS

作　　者：徐若曦[1,2] 周鹏[1] 章锦文[1] 孙绍辉 

机构地区：[1]北京控制与电子技术研究所,北京100038 [2]中国航天科工二院,北京100854 [3]西安飞豹科技发展公司,陕西西安710089

出　　处：《计算机仿真》2015年第5期90-94,共5页Computer Simulation

摘　　要：导引头性能测试中,射频仿真的关键在于天线阵列辐射被试设备所需的目标回波,但天线三元组阵列的辐射特性即射频仿真系统的空域特性与导引头真实回波之间存在差异,并且难以解析表达,使得导引头测角误差的量化分析比较困难。针对上述问题,采用天线阵列电磁建模结合雷达导引头数学建模的方法,得到系统空域特性,计算其在不同目标位置引起的导引头测角误差。结果表明:射频仿真系统的空域特性会影响导引头的测角灵敏度和测角精度,而建立的模型能准确量化误差,便于修正三元组幅度控制指令以补偿测角误差,提高导引头接收信号角位置精度,增强导引头性能测试的可靠性。During performance test of seeker, target echo simulation is the key. But the spatial characteristic of radio frequency simulation system produced by radiation of triad arrays is different from the true echo and is hardly to be expressed in mathematics, so that it is difficult to estimate angle measurement errors. In view of the above prob- lem, a new method was proposed, which combines electromagnetic modeling of triad arrays with mathematical modeling of the sum-difference patterns range-comparison mono-pulse radar system. The spatial characteristic of radio frequency simulation system was obtained through simulation. The angle measurement errors of various target positions were calculated. The results show that the spatial characteristics of radio frequency simulation system can affect the sensitivity and accuracy of angle measurement. The models can accurately quantify the error so that the magnitude of triad arrays can easily be controlled and the error can be corrected in advance. The precision of target signal position received by the seeker is improved, and the reliability of performance test of the seeker is enhanced.

关 键 词：射频仿真系统 三元组 空域特性 单脉冲 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]