Analysis of Magnetic Field Waveforms of Different Launching Stages of Rail Gun Based on Wavelet Transform

Electromagnetic disturbance in the course of rail-gun launching has great influence on the launching process and staff. Based on the magnetic force measured at the startup acceleration and separation stages, the corresponding magnetic field can be calculated. The magnetic field at different positions and heights near the rail gun is analyzed and compared. The results show that the position of the armature has great influence on the magnetic field. The maximum value of the instantaneous magnetic field should be located in the middle of the rail gun. At the same position, the magnetic field decays rapidly with the increase of height. The electromotive force waveforms are analyzed by using the wavelet transform; the analysis shows that the wavelet transform can reveal the time-frequency energy distribution of the electromotive force more accurately and clearly. The research of this paper has a guiding significance to the shielding design of magnetic field of the electromagnetic rail gun, and will promote the development of rail guns.