HIRF测试中地面多径反射干扰消除方法  

A Study on Elimination Method of Ground Multipath Reflection Interference in HIRF Test

作　　者：方金鹏 张元 武亚君 

机构地区：[1]上海市航空航天器电磁环境效应重点实验室,上海200438

出　　处：《制导与引信》2015年第2期54-59,共6页Guidance & Fuze

基　　金：上海市科学技术委员会的资助;资助课题编号为12ZR1430400

摘　　要：航空航天器高强辐射场(HIRF)符合性试验一般采用地面模拟测试,验证外部人为电磁环境对关键性机载电子电气系统的干扰影响。由于地面多径反射干扰,测试结果中引入了地面反射干扰误差。提出了一种消除方法,用于消除地面多径反射干扰而引入的测量误差。该方法采用射线路径追踪法计算测试区域中的电场强度,并基于最小平方误差逼近法将直射电磁波和地面反射电磁波分量分离出来,以此确定地面多径反射误差消除的校正因子,从而实现干扰误差的消除处理。分别采用仿真与测试手段对消除算法进行了有效性分析,经消除算法处理后的数据与无地面反射时的真实数据非常吻合。The ground simulation test,often used in the conformity test of high intensity radiated field（HIRF）for aviation aircraft,is used to verify the interference influence on the electronic system on board.Due to the interference of ground multipath reflection,the error of the ground reflection interference is introduced in the test results.This paper proposes an elimination method,which is used to remove measurement errors introduced due to ground multipath reflection interference.Firstly,to calculate the electric field distribution in the test area using the ray path tracing method;and direct electromagnetic（EM）wave and ground reflection EM wave components can be separated by using the least square error approximation.And then,the correction factor can be determined to clear up ground multipath interference error.It is verified by the simulation and test means in this paper,and gets a good agreement with the result processed by the eliminate method and the data without ground reflection interference.

关 键 词：辐射场 多径反射 最小平方误差逼近 校正因子 

分 类 号：TM937[电气工程—电力电子与电力传动]