Publication: Optimisation of multi-stage electromagnetic launcher
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Date
2021-07-01
Authors
Idris, Nabil Fikri
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Abstract
This project investigated the parameters and methods that can be used to optimize the multistage electromagnetic launcher. The initial supplied voltage, the shape of the projectile, the initial projectile starting position, number stage of the electromagnetic launcher and material of the projectile are all variables in this experiment that affect the projectile’s speed and the efficiency of the electromagnetic launcher. All experiments were conducted by using speed sensor to collect the data speed of the projectile to analyze the better electromagnetic launcher. By using FEMM simulation software, the magnetic field and flux density of the electromagnetic launcher have been analyzed to find and calculate the theoretical value. The simulation result was then compared with the experiment result to analyze the corresponding differences between the theoretical and real data. From this project, the maximum value efficiency of the launcher was found 4.19% with 200V being supplied at six stage electromagnetic launcher. The starting position that produces maximum velocity 48.48 m/s was found at 7.5 mm with 250V for ten stage launcher. For the shape parameter of the projectile, the highest velocity that produced was 11.26 m/s for flat projectile at 7.5mm position with 250V for single stage electromagnetic launcher. From the observation, the maximum value of speed of the projectile and the efficiency of the electromagnetic launcher can be obtained when more stage of the electromagnetic launcher, more value of initial voltage supplied, pure iron material of the projectile and the projectile position a little bit in the coil was used.