摘要
结合整车电磁兼容问题的特点,建立车身几何三维数据模型。利用小波包分解对采集到的干扰源数据,采用能量保持准则进行特征提取,将所得特征频谱作为整车数值仿真的激励源的调制数组。结果表明:仿真结果与实测结果有一定的误差。最后,分析了产生误差的主要原因,并总结了开展汽车EMC计算机仿真分析的关键技术、相关理论。
The 3-D model was built up combining with EMC characteristics of automobile. The feature spectrum of the disturbance excitation was obtained by the wavelet packet decomposition based on the actual test data of the interference source. Based on the numerical analysis platform, a visual dynamic simulation was proposed to observe the distributions. According to the simulation and actual test results, the main reason for errors was discussed. In view of the characteristics of the EMC problems, the key technologies and the correlation theories were summarized.
关键词
汽车电磁兼容性
辐射发射
激励源
小波包分解
特征提取
automotive electromagnetic compatibility
radiated emission
excitation
wavelet packet decomposition
feature extraction
