Research on susceptibility of vehicles to complex electromagnetic environment based on reverberation chamber
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摘要: 为了评估道路车辆在复杂电磁环境中的适应性，研究了基于实际电磁环境的车辆辐射抗干扰混响室试验方法。对实际电磁信号进行采集，在混响室内搭建了复杂电磁信号回放系统，分析了接收功率的累积分布函数。针对复杂电磁信号，给出了混响室的场强标定方法和辐射抗扰度测试方法，并开展了车辆辐射抗扰度测试验证，结果表明在混响室复杂电磁环境下，部分车型存在电磁安全风险，该方法的提出为企业进行车辆电磁兼容品质评估提供了重要支撑。Abstract: To assess the susceptibility of road vehicles in complex electromagnetic environments, this paper proposes a radiation immunity testing method of vehicles based on actual electromagnetic environments in reverberation chambers (RCs), which records the actual electromagnetic signals, constructs a complex signal playback system in an RC, and gives the cumulative distribution function (CDF) of the received power. Moreover, this paper provides a field strength calibration method and the radiation immunity testing in an RC. The radiation immunity testing of vehicle was conducted, and the results show that in the complex RC electromagnetic environment, some vehicles have electromagnetic safety risks. The study method provides important support for enterprises to evaluate the electromagnetic compatibility quality of vehicles.
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图 1 基于混响室的复杂电磁环境系统
Figure 1. Typical configuration of the system based on complex EM signals in an RC
图 2 DVB环境模拟信号的归一化频谱图、接收频谱图及CDF曲线图
Figure 2. Normalized power spectrum, received power spectra and CDF graph of DVB signal
图 3 基于腔体Q值标定加载混响室测试示意图及归一化加载混响室峰值场强（搅拌桨位置N=12）
Figure 3. Measurement setup of field calibration in a loaded RC and the normalized peak field strength of loaded reverberation chamber with 12 stirrer positions based on Q factor method
图 4 基于接收功率的加载混响室场标定布置图及归一化加载混响室峰值场强（搅拌桨位置N=12）
Figure 4. Field calibration setup of loading reverberation chamber based on received power and normalized peak field strength of loading reverberation chamber with 12 stirrer positions
图 5 混响室辐射抗扰度测试布置
Figure 5. Measurement setup of radiated susceptibility testing in an RC based on complex signals
图 6 辐射抗扰度测试照片
Figure 6. Image of radiated susceptibility test in an RC based on complex signals
表 1 不同车型的电磁环境适应性测试结果
Table 1. Test results of different type of vehicles
test signal vehicle model vehicle malfunction 3 GHz recording signal 1 no abnormality 4 GHz recording signal multimedia system malfunction 3 GHz environmental simulation signal no abnormality 4 GHz environmental simulation signal no abnormality 3 GHz recording signal 2 no abnormality 4 GHz recording signal lighting system malfunction 3 GHz environmental simulation signal no abnormality 4 GHz environmental simulation signal no abnormality 3 GHz recording signal 3 assisted driving malfunction 4 GHz recording signal no abnormality 3 GHz environmental simulation signal no abnormality 4 GHz environmental simulation signal no abnormality 
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