混响室与均匀场中引信电磁辐射抗扰度测试相关性研究  

Research on Correlation of Electromagnetic Radiation Susceptibility for Radio Fuze in Uniform Field and Reverberation Chamber

作　　者：魏光辉[1] 刘心愿[1] 孙永卫[1] 熊久良[1] 

机构地区：[1]军械工程学院电磁环境效应国家重点实验室,石家庄050003

出　　处：《高电压技术》2015年第1期287-293,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(60671057)~~

摘　　要：针对均匀场环境下电磁辐射抗扰度测试难以满足大线度受试设备及高场强测试需要的难题,借助混响室在测试空间和强电磁场模拟等方面的优势,提出了混响室条件下无线电引信电磁辐射抗扰度测试方法。该方法基于混响室步进工作模式和腔体内某点处的场强值与输入功率的平方根成正比的基本原理,首先测算出被试引信置入前不同频率、不同搅拌器位置下实验点的场强值与输入功率平方根的比值,再通过实验测试引信受干扰发火时对应的输入功率,计算确定受试引信在不同测试频点、不同搅拌器位置下的电磁辐射干扰场强。实验结果表明:以搅拌器旋转一周过程中搅拌器处于不同位置处测量确定的电磁辐射干扰场强最小值作为混响室条件下无线电引信的干扰场强临界值,不仅在数值上接近均匀场环境下的测量结果,而且2种实验环境中测试结果的相关系数达到了0.97,体现了混响室电磁辐射抗扰度测试方法的可行性。The electromagnetic radiation susceptibility test methods under uniform electromagnetic field environment can not meet the needs of great projectile bodies and high field strength tests. With the aid of advantages of reverberation chamber in test space and strong electromagnetic field simulation and so on, we have proposed an electromagnetic radia- tion susceptibility test method for the radio fuse, which is based on the step-by-step work-mode for reverberation chamber, and is also based on the basic theory that field strength at a point in the cavity is proportional to the square root of input power. First, before the fuse is embedded, the ratio of field strength to the square root of input power at one test position is calculated for different test frequencies and stepping positions, then, the critical initiating input power for the fuse under test is measured in different frequencies and stirring positions, and the critical initiating field strength can be calculated with the input power measured during susceptibility test in reverberation chamber. The experimental results show that, when we take the minimum value among the measured values of different sampling points as the susceptibility threshold in the test frequency, the threshold is numerically close to the measurement result of uniform field environment, and the correlation coefficient between two environment is as high as 0.97. The results reveal that this test method is feasible.

关 键 词：均匀场 混响室 步进模式 无线电引信 电磁辐射抗扰度 相关系数 

分 类 号：TM937.3[电气工程—电力电子与电力传动]