Design and Implementation of Indirect Lightning Protection for Airborne Electronic Equipment

Airborne electronic devices are susceptible to lightning attacks during aerial operation, which can affect signal transmission and collection, and even lead to damage to airborne electronic devices, affecting flight safety. In response to the issue of airborne electronic equipment being susceptible to indirect lightning interference or even damage, indirect lightning protection is designed and implemented at the corresponding lightning test level. The protection objects include the chassis, power supply, and various interface signals. The focus is on analyzing the methods of selecting different transient suppression diodes based on the characteristics of various interface signals, aiming to improve the reliability of airborne electronic equipment. After experimental verification, a design method for indirect lightning protection of airborne electronic devices has passed rigorous lightning tests and meets the requirements of lightning protection. It can effectively protect the back-end circuit and provide reference for indirect lightning protection design of other airborne electronic devices.