机载多芯屏蔽线束的传导敏感度研究  

Research on Conducted Susceptibility of Airborne Multicore Shielded Wire

作　　者：郗松岳 徐琦 李继成 李天傲 刘亮 路宏敏[2] XI Songyue;XU Qi;LI Jicheng;LI Tianao;LIU Liang;LU Hongmin(Xi'an XICE Test Technology Co.Ltd.,Xi'an 710065,China;School of Electronic Engineering,Xidian University,Xi'an 710071,China;Xi'an Aerospace Precision Electromechanical Institute,Xi'an 710100,China)

机构地区：[1]西安西测测试技术股份有限公司,陕西西安710065 [2]西安电子科技大学电子工程学院,陕西西安710071 [3]西安航天精密机电研究所,陕西西安710100

出　　处：《电子科技》2025年第5期89-94,共6页Electronic Science and Technology

基　　金：国防基础科研类项目(MKF20230377)。

摘　　要：随着航空电子系统不断复杂化,多芯屏蔽线束在复杂电磁环境中的传导敏感度问题影响着机载设备的可靠性。针对多芯屏蔽线束的传导敏感度问题,文中研究了不同芯线数量的线束其单端接地与双端接地的屏蔽效果,提出了一种结合实验测试与数据拟合的协同方法。基于已有传导敏感度测量系统,在10 kHz~0.4 GHz频率范围内对双芯、四芯、八芯线束的感应电流进行测试与分析。结果表明,多芯线束中单根芯线的敏感度电平随芯线数量增加而降低。频率小于300 MHz的双端接地线束屏蔽效果优于单端接地,八芯线束的单芯感应电流仅为单芯线束的10%~40%,为机载多芯屏蔽线束的设计与工程应用提供了重要参考。With the increasing complexity of avionics systems,the problem of the conducted susceptibility of multi-core shielded wire harnesses in complex electromagnetic environments affects the reliability of airborne equipment.In view of the conducted susceptibility problem of multi-core shielded wire harnesses,this study investigates the shielding effects of single-ended grounding and double-ended grounding for wire harnesses with different numbers of core wires,and proposes a collaborative method combining experimental testing and data fitting.Based on the existing conducted susceptibility measurement system,the induced currents of two-core,four-core,and eight-core wire harnesses are tested and analyzed within the frequency range of 10 kHz to 0.4 GHz.The results show that the susceptibility level of a single core wire in a multi-core wire harness decreases as the number of core wires increases.For double-ended grounded wire harnesses,the shielding effect is better than that of single-ended grounded ones when the frequency is less than 300 MHz.The induced current of a single core in an eight-core wire harness is only 10%to 40%of that in a single-core wire harness,which provides an important reference for the design and engineering application of airborne multi-core shielded wire harnesses.

关 键 词：机载设备 多芯线束 传导敏感度 接地 协同方法 电磁兼容性 感应电流 传输线理论 

分 类 号：TN97[电子电信—信号与信息处理]