端口非线性条件下双端差模注入法可行性研究  

Study on Feasibility of Double Differential Mode Current Injection Method Under Condition of Terminal Nonlinearity

作　　者：卢新福[1] 魏光辉[1] 潘晓东[1] 范丽思[1] 万浩江[1] 

机构地区：[1]军械工程学院静电与电磁防护研究所,石家庄050003

出　　处：《高电压技术》2015年第12期4213-4219,共7页High Voltage Engineering

基　　金：国家自然科学基金(61372040);总装备部预研项目(51333040101)~~

摘　　要：电子设备响应的非线性主要表现为端口非线性和转移非线性,为研究端口非线性条件下双端差模注入方法的可行性,理论分析了在不对受试设备特性做出限定的情况下双端注入和辐照之间的等效性,研究了以两耦合装置监测端电压的幅值和相位差作为等效依据的正确性,仿真分析了线缆两端为非线性负载时试验方法的可行性,通过在不同场强下将不同阻值的通过式负载接入线缆两端,试验研究了双端注入方法的准确性。结果表明:场强和等效注入电压线性外推关系的成立与两端设备特性无关;以耦合装置监测端电压的基波分量为等效依据,可保证终端响应的各次谐波分量均相等;当终端负载阻抗随场强增大而改变时,双端注入等效辐照试验所得两端负载响应的误差均<4.5%。因此,双端差模注入方法适用于端口非线性情况且准确性很高。The nonlinear characteristics of the electronic equipment response include the terminal nonlinearity and the transfer nonlinearity. In order to assess the feasibility of the double differential mode current injection （DDMCI） method when the temlinal nonlinearity is concerned, we analyzed the equivalence between DDMCI and radiation without making any assumptions on the equipment under test （EUT）. Moreover, we studied the validity that the amplitudes and the phase difference of the two monitor voltages are treated as the equivalence parameters, and analyzed the feasibility of the DDMCI method by simulation when the nonlinear loads are connected at the cable ends. The accuracy of the method was verified by experiment when different feed-through impedances were employed at different radiated strengths. The results indicate that the relationship between the field strength and the injected voltage is linear, regardless of the EUT characte- ristics. The harmonic components of the EUT responses are equivalent for radiation and injection if the fundamental components are imposed to be the same. The experiment error is less than 4.5% when the terminal impedances change with the field strength. Hence, the feasibility of DDMCI is confirmed and the accuracy is high under the condition of the terminal nonlinearity.

关 键 词：端口非线性 双端注入 差模耦合 辐照法 强电磁场 电磁环境效应测试 

分 类 号：E92[军事—军事装备学] E91[兵器科学与技术—武器系统与运用工程]