【作者】 胡鹏； 刘亮亮； 李茁； 周忠元； 周香；

【Author】 HU Peng;LIU Liang-liang;LI Zhuo;ZHOU Zhong-yuan;ZHOU Xiang;College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics;School of Resources and Environmental Engineering, Southeast University;Southeast University Suzhou Campus;

【机构】 南京航空航天大学电子信息工程学院； 东南大学电磁环境效应研究中心； 东南大学苏州校区；

【摘要】 针对GB/T 17626.21-2014、GJB 151B-2013和RTCA DO-160G等不同标准中峰值场强定义存在的差异,从数值模拟和试验测试两方面出发,对电磁混响室内峰值场强进行了对比研究。在数值模拟方面,分别介绍了基于蒙特卡洛法和基于极值理论的峰值场强估计方法,并给出了4.025 m×3.5 m×2.85 m和7 m×4.025 m×3.5 m两个混响室内的试验结果。结果表明:总场与分量场的峰值场强之比小于1.7321;基于极值理论估计的峰值场强受幂指数影响显著,总场与分量场的峰值场强之比明显偏低;基于蒙特卡洛法模拟的峰值场强更接近试验结果,当p=0.95和0.99时,总场与分量场的峰值场强之比约为1.5和1.4。但由于机械搅拌器所提供的独立搅拌位置不明确,极少数频点存在一定的偏差。更多还原

【Abstract】 For the differences in the definition of peak field strength in different standards, e.g., GB/T 17626.21-2014, GJB151B-2013 and RTCA DO-160G, a comparative study of peak field strength in reverberation chamber had been discussed from the perspectives of numerical simulation and experimental testing. Regarding the peak field strength simulation methods, Monte Carlo method and extreme value theory were used respectively, and experimental results in two reverberation chambers, i.e., 4.025 m x 3.5m x 2.85 m and 7 m x 4.025 m x 3.5 m, were presented. The results show that the ratio of peak field strengths defined based on total field and component field is less than 1.7321. The peak field strength estimated by extreme value theory is significantly influenced by power exponent, and the ratio is significantly lower. The peak field strength simulated by Monte Carlo method is closer to the experimental results, the ratio of peak field strength defined based on total field and component field is about 1.5 and 1.4 for p=0.95and 0.99, respectively. However, due to the unclear independent stirring position provided by the mechanical stirrers, there is still some deviation in some frequency points.更多还原