【摘要】 为有效降低机载光电测量吊舱地线系统上的电磁干扰和提高电气安全性,必须进行合理的接地设计。介绍了保护性接地、信号接地的原理和实现方法,阐述了地线干扰产生的机理,针对地环路和公共阻抗耦合干扰提出了抑制方法,并结合设计实践,系统分析了机载光电测量吊舱的内部接地设计特点。并以此设计了某型军用电子设备的地线系统,经实际使用表明该设备达到了较好的电磁兼容性能。给出的接地方法可为机载测量设备的接地工程实践提供参考。更多还原

【Abstract】 In order to reduce Electro-magnetic Interference(EMI)and improve electric safety of the Airborne Electro-optical measuring system,reasonable grounding design is necessary.It’s issued in the paper that the principle and methods of grounding for safety and EMI.The grounding interference mechanism is expatiated also.Grounding interference and inhibition method of coupling circuit loop and common impedance are described also.The design characters of the grounding design are analyzed in system.It’s showed that perfect EMC performance of the system in practice.The main ways of Airborne Electro-optical measuring system’s grounding design may provide a reference of the similar engineering fields.更多还原