飞机低阻抗传导网络的阻抗分布及电磁耦合特性评估

Impedance distribution and electromagnetic coupling characteristics evaluation of aircraft low impedance conductive network

摘要:

飞机低阻抗传导网络的阻抗分布对机载线束的电磁耦合效应有着重要影响，对飞机低阻抗传导网络电磁耦合特性的研究可以显著提升飞机系统级电磁兼容性仿真的精度。提出一种飞机低阻抗传导网络电磁样机建模方法，基于电磁样机对飞机低阻抗传导网络的阻抗分布特性和电磁耦合特性进行仿真评估并完成飞机实机测试验证。结果表明：飞机低阻抗传导网络在0.1 MHz 以下频段呈现阻性和感性，在0.1 MHz 以上频段呈现感性与容性交替的电磁谐振特性。

Abstract:

The impedance distribution of low impedance conductive networks in aircraft has a significant impact on the electromagnetic coupling effect of onboard wiring harnesses. Studying the electromagnetic coupling characteristics of low impedance conductive networks in aircraft can significantly improve the accuracy of aircraft system level electromagnetic compatibility simulation. This article proposes an electromagnetic prototype modeling method for aircraft low impedance conduction networks. Based on the electromagnetic prototype, the impedance distribution characteristics and electromagnetic coupling characteristics of the aircraft low impedance conduction network are simulated and evaluated, and the aircraft actual test verification is completed. The simulation and test results show that the low impedance conductive network of the aircraft exhibits resistive and inductive characteristics in the frequency band below 0.1MHz, and alternating inductive and capacitive electromagnetic resonance characteristics in the frequency band above 0.1MHz.