Optimization design of a new simulated projectile electromagnetic blocking device based on permanent magnet

In this paper, a kind of electromagnetic blocking device of simulated projectile based on rodless cylinder ejection is designed. The characteristic of the device is that only permanent magnet is used as the magnetic field source, and eddy current is generated by the circular cutting magnetic field on the simulated projectile, so as to slow down the simulated projectile. According to Maxwell simulation calculation, when the thickness of permanent magnet is 200mm, axial magnetization and reverse arrangement are adopted, the simulated projectile with initial velocity of 20m/s and mass of 200kg can be slowed down to 0m/s in 275ms, and the displacement of simulated projectile at this time is 2457mm. In the actual situation, due to friction and other reasons, The simulated spring deceleration displacement is smaller than the simulated value.