Development of a Reliable Vibration-Current Coupling-Based Foreign Matter Detection System for Electro-Explosive Devices

Abstract

Electro-explosive devices (EEDs) are components that initiate the explosive charge through electrical current input, converting it into chemical energy or kinetic energy in the form of heat, pressure, and shock waves. These mission-critical components are extensively integrated into space launch systems, naval vessels, and spacecraft propulsion systems, where their operational reliability directly influences mission outcomes. The insulation performance of EEDs is susceptible to degradation due to foreign objects in static discharge channels, which can lead to ignition failure. Based on the particle noise method, this study proposes a reliable foreign object detection system that leverages the vibration-current coupling relationship. By integrating adjustable vibration excitation loading and real-time leakage current detection, an automated system is established to define process parameter ranges and detection criteria. The system enables automated and reliable detection of foreign objects larger than 0.05 mm in length.