Simulation and Experiment on Pin-to-Pin Electrostatic Discharge Firing of Bridgewire EED

This paper establishes an ideal mathematical model for pin-to-pin electrostatic discharge (ESD) firing that takes the axial and radial temperature distribution of the bridgewire, heat release, and the reagent consumption into consideration. The model is solved using the finite difference method, and the ESD firing process is analyzed using the results of the time-varying bridgewire/reagent temperatures and the residual reagent percentages. The effects of the model parameters on the ESD firing voltage are analyzed. A comparison of the ESD test firing voltages and the calculated results and a comparison of the test values of normal capacitor firing voltages and the calculated results both verify that the presented model is effective. The model can be used for the estimation of ESD firing voltage. The theoretical guidance of ESD protection for electric explosive device (EED) was provided.