Spatial Movement Analysis on the Intercepting Projectile in the Active Electromagnetic Armor

Active electromagnetic armor is a new kind of concept armor that integrates active defense and electromagnetic launch technology. During launching, the spatial movement of the intercepting projectile determines the intercepting probability for attacking the coming targets. For two perpendicular pancake coils, the intercepting projectile can be launched in different directions by changing the trigger times controlled by two switches. In this paper, a field-circuit coupled model of a two coil launcher is built first. When two coils are discharged simultaneously, the intercepting projectile is directed at the angular bisector of two coils. The eddy current in the intercepting projectile is mainly distributed near the coils, and the current density decreases dramatically along the normal direction of the surface. For different trigger times, the intercepting projectile moves in both types: linear and rotation. The moving characteristic on the intercepting projectile is analyzed. If the electromagnetic force is not exerted on the mass center along the movement of the intercepting projectile, the spatial movement may be changed. Based on the simulation results, a steerable launcher has been built. Three typical experimental results for the simultaneous discharge launching are shown under the same condition. The spatial movements for steerable launching at the simultaneous time and delay time of 1 ms are measured by the high speed camera. Compared with the experimental results, the simulation results are validated. It provides the reference for launching the projectile to intercept the coming targets.