Study on Multi-Segment Asynchronous Induction Coilgun Launcher

Abstract

This article studies a multi-segment capacitively driven asynchronous induction coil launcher. First, a segment with six-stage asynchronous induction coil launcher is studied. Based on the results of the single-segment induction coil launcher and the orthogonal design method, a six-factor and five-level orthogonal table is established. The factors are, namely, trigger position, armature thickness, initial capacitance voltage, inner radius of coil, turns of coil, and coil axial length. The results of the orthogonal test show that the influencing factors from large to small are coil turns, coil axial length, initial capacitance voltage, coil radius, trigger position, and armature thickness. Based on the above results, a two-segment asynchronous induction coil launcher is designed. The coil parameters of the second section are the same as those of the first section, and the number of coils is twice that of the first section. By studying the trigger position, capacitance, and voltage combination of the second stage, the optimal trigger position is 163 mm, capacitance value is 1125 μF, and capacitance voltage is 4 kV. On account of the above research results, a four-segment induction coil launcher with two armatures is proposed. The parameters of the first and third segments are the same, and the parameters of the second and fourth segments are the same. The first and second segments drive armature 1, and the third and fourth segments drive armature 2. In the case of cross ignition, the standard deviation of armature force is 18.62 kN, while the standard deviation of armature force for sequential ignition is 25 kN. Through cross ignition, higher armature muzzle velocity and smaller acceleration jitter can be obtained.