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针对高强度辐射场(HIRF)实验室条件下无法构建,单纯辐照法难以有效开展系统级电磁辐射敏感度及安全裕度试验的问题,对电磁注入等效替代辐照理论、方法及实现技术进行了研究。本着有限目标的原则,针对典型互联系统,以设备端口的响应信号相等作为等效依据,建立了注入替代辐照的等效模型和强场条件下注入电压源外推模型,基于Baum-Liu-Tesche(BLT)方程和传输线阻抗分析理论,给出了互联传输线终端响应的计算方法,确定了注入法等效替代辐照法应满足的2个条件,即等效激励源相等和激励源输出阻抗相等,理论推导了注入电压与辐照场强之间的等效对应关系。采用注入耦合模块作为辅助试验设备,实现了互联系统中前向电压信号的提取、干扰信号的注入以及正常传输信号的有效监测;提出的注入与辐照相结合的互联系统电磁辐射效应试验方法,为正确评价互联系统的电磁辐射敏感度与安全裕度提供了切实可行的研究手段和技术支撑。
In order to overcome the shortcomings of HIRF experiment in laboratory conditions, it is difficult to carry out system-level electromagnetic radiation sensitivity and safety margins test with pure irradiation method. The equivalent electromagnetic radiation substitution theory, method and technology Were studied. According to the principle of limited target, aiming at the typical interconnected system, equivalent signal of equivalent input of equipment port is taken as the equivalent basis, an equivalent model of injection alternative irradiation and an extrapolation model of injection voltage source under strong field are established. Based on Baum-Liu -Tesche (BLT) equation and impedance analysis theory of transmission line, the calculation method of the terminal response of interconnected transmission line is given, and two conditions which are equivalent to the alternative irradiation method for injection are determined, that is, the equivalent excitation source is equal and the excitation source output Equal impedances, the equivalent derivation of the injection voltage and the radiation field is deduced theoretically. The injection coupling module is used as the auxiliary test equipment to realize the extraction of the forward voltage signal, the injection of the interference signal and the effective monitoring of the normal transmission signal in the interconnected system. The proposed electromagnetic radiation effect test method of the interconnected system combining the injection and the irradiation, In order to correctly evaluate the sensitivity and safety margins of the electromagnetic radiation of the interconnected system provides practical research methods and technical support.