航空电连接器腐蚀退化仿真研究  

Simulation Research on Corrosion Degradation of Avionics Connectors

作　　者：杜一江 郁大照 刘琦 DU Yi-jiang;YU Da-zhao;LIU Qi(School of Basic Sciences for Aviation,Naval Aviation University,Shandong Yantai 264001,China)

机构地区：[1]海军航空大学航空基础学院,山东烟台264001

出　　处：《装备环境工程》2023年第12期116-127,共12页Equipment Environmental Engineering

基　　金：国家自然科学基金(51345790)。

摘　　要：目的探索当航空电连接器腐蚀退化时,其接触阻抗的变化规律,研究航空电连接器腐蚀退化对信号传输的影响规律。方法首先对航空电连接器腐蚀退化的机理进行研究,建立其等效电路模型,然后分别对低频电连接器和射频电连接器进行仿真研究,提取阻抗参数,分析腐蚀退化对信号传输的影响规律。结果接触电阻随着腐蚀程度的加深明显增大,接触电感随着腐蚀程度的加深变化不大,接触电容随着接触面腐蚀面积的增大而增大,随接触面间腐蚀厚度的增加而减小。接触电阻随频率的增加而增大,接触电感和接触电容随频率的增大基本保持不变。接触阻抗在低频时呈现感性特征,高频时呈现容性特征,阻抗幅值随频率的增加先增大、后减小,峰值出现在感性和容性转换频率处,腐蚀退化将使该转换频率减小。结论对于低频信号,腐蚀退化将导致信号的衰减和延迟;对于高频信号,在转换频率处,信号的回波损耗、插入损耗和电压驻波比出现极值。The work aims to explore the changes in contact impedance of avionics connectors when they undergo corrosion degradation,and to study the impact of corrosion degradation on signal transmission of avionics connectors.This article first studied the mechanism of corrosion degradation of avionics connectors,established their equivalent circuit models,and then conducted simulation studies on low-frequency and RF electrical connectors,extracted impedance parameters,and analyzed the impact of corrosion degradation on signal transmission.The simulation results showed that the contact resistance increased obviously with the increase of the corrosion degree,while the contact inductance changed little.The contact capacitance increased with the increase of the corrosion area of the contact surface,and decreased with the increase of the corrosion thickness between the contact surfaces.The contact resistance increased with the increase of frequency,and the contact inductance and contact capacitance remained basically unchanged with the increase of frequency.The contact impedance presented inductive characteristics at low frequency and capacitive characteristics at high frequency.The impedance amplitude first increased and then decreased with the increase of frequency,and the peak appearred at the inductive and capacitiveconversion frequency,which would be reduced by the corrosion degradation.For low-frequency signals,corrosion degradation will lead to signal attenuation and delay.For high-frequency signals,extreme values of return loss,insertion loss and VSWR will appear at the conversion frequency.

关 键 词：电连接器 腐蚀退化 等效电路 阻抗参数 信号传输 仿真 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]