Abstract
In underwater ejection system, high pressure difference and noise can be fatal. In this study, we conducted research on Hydraulic Piston Ejection System including accumulator through simulation based design to minimize drawbacks. We set the maximum pressure difference, and ejection speed of the projectile as an objective function, and the maximum acceleration as constraints to optimize the 4 design parameters of the ejection system. We designed dynamic simulation model with C# to implement ejection system. Also, we used NSGA-II to optimize design parameters.