Simulations, Experiments, and Launch Characteristics of a Multiturn Series–Parallel Rail Launcher

In order to markedly improve the inductance gradient of electromagnetic (EM) railgun and current-carrying capacity of the armature, and enhance the ability to launch large mass projectiles, a system simulation analysis and preliminary experiments were carried out for the multiturn series-parallel rail launcher (MSPRL). First, the Simulink simulation model of the rail launcher system based on the circuit model was established, and the changing rules of current waveforms and armature velocities under different contact resistances were obtained. Then, an EM-structural multiphysics fields coupling model is constructed, with the supplied currents obtained earlier, the EM propelling force on the armature as well as contact force between the armature and rails were analyzed. In view of those analyses, the inductance gradient and armature velocity in bore were calculated. Finally, the test platform of the MSPRL was built to carry out preliminary verification experiments of relevant parameters. During the test, the muzzle impedance and muzzle velocity were measured, and the validities of the simulation models were verified.