Optimization of Electromagnetic Railgun and Projectile’s Trajectory by Genetic Algorithm

Subject Areas : Majlesi Journal of Telecommunication Devices

Navid Moshtaghi Yazdani ¹ , Mohammad Hasan Olyaei ²

1 - Department of Electrical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
2 - Faculty of Electrical Engineering, Sadjad University of Technology, Mashhad, Iran.

Received: 2022-03-07 Accepted : 2022-03-07 Published : 2022-03-01

Keywords: Optimization, simulink simulation, railgun, Genetic Algorithm, Modeling,

Abstract :

In this paper, the optimization of the electromagnetic railgun and its projectile path is proposed. The circuit model is used to optimize and simulate the elec- tromagnetic railgun, in which the equivalent circuit of the railgun is extracted. Then the differential equations expressing the physics governing the system are obtained. Using the projectile path equations and simulating them in MATLAB, the output of the simulation of the electromagnetic railgun and its projectile path in MATLAB software has been analyzed. The main advantage of the models used is that they can be used in matters of sensitivity and optimization due to their high speed. Based on the obtained outputs of electromagnetic railgun and projectile path, the cost function is presented, and then the effective parameters of models are optimized using the genetic algorithm. The results show that the losses and costs are drastically reduced for the same purposes, and the waste of costs and energy is prevented.

References:

[1] J. Kerrisk, “Current distribution and inductance calculations for rail-gun conductors”, NASA STI/Recon Technical Report N 82, 29551, 1981.

[2] S. N. Praneeth, B. Singh, “Influence of filleting and tapering of rails on railgun parameters”, IEEE Transactions on Plasma Science, Vol. 48, No. 3, pp. 721–726, 2020.

[3] B.-K. Kim, K.-T. Hsieh, “Effect of rail/armature geometry on current density distribution and inductance gradient”, IEEE transactions on Magnetics Vol. 35, No. 1, pp. 413–416, 1999.

[4] A. Keshtkar, “Effect of rail dimension on current distribution and inductance gradient”, IEEE Transactions on Magnetics Vol. 41, No. 1, pp. 383–386, 2005.

[5] J. Gallant, “Parametric study of an augmented railgun”, IEEE Transactions on Magnetics, Vol. 39, Vol. 1, pp. 451–455, 2003.

[6] O. Liebfried, “Review of inductive pulsed power generators for railguns”, IEEE Transactions on Plasma Science, Vol. 45, No. 7, pp.1108–1114, 2017.

[7] K.-S. Yang, S.-H. Kim, B. Lee, S. An, Y.-H. Lee, S. H. Yoon, I. S. Koo, Y. S. Jin, Y. B. Kim, J. S. Kim, et al., “Electromagnetic launch experimentsusing a 4.8-mj pulsed power supply”, IEEE Transactions on Plasma Science, Vol. 43, No. 5, pp. 1358–1361, 2015.

[8] J. Kerrisk, “Electrical and thermal modeling of railguns”, IEEE Transactions on Magnetics, Vol. 20 No. 2, pp. 399–402, 1984

[9] A. Keshtkar, L. Gharib, M. S. Bayati, M. Abbasi, “Simulation of a two-turn railgun and comparison between a conventional railgun and a two-turn railgun by 3-d fem”, IEEE Transactions on Plasma Science, Vol. 41, No. 5, pp. 1392–1397, 2013.

[10] K.-T. Hsieh, “Numerical study on groove formation of rails for various materials”, in: 2004 12th Symposium on Electromagnetic Launch Technology, IEEE, 2004, pp. 355–358.

[11] J. Kerrisk, “Electrical and thermal modeling of railguns”, IEEE Transactions on Magnetics, Vol. 20 , No. 2, pp. 399–402. A, 1984.

[12] D. Rodger, H. Lai, “A comparison of formulations for 3d finite element modeling of electromagnetic launchers”, IEEE transactions on magnetics, Vol. 37, No. 1, pp. 135–138, 2001.

[13] Y. He, Y. Guan, G. Gao, Y. Li, X. Qiu, B. Wei, S. Song, “Efficiency analysis of an electromagnetic railgun with a full circuit model”, IEEE Transactions on Plasma Science, Vol. 38, No. 1, pp. 3425–3428, 2010.

[14] D. Rodger, P. J. Leonard, J. F. Eastham, “Modelling electromagnetic rail launchers at speed using 3d finite elements”, IEEE transactions on magnetics, Vol. 27, No. 1, pp. 314–317, 1991.

[15] L. M. Hively, W. C. Condit, “Electromechanical railgun model”, IEEE trans-actions on magnetics, Vol. 27, No. 4, pp. 3731–3734, 1991.

[16] A. Keshtkar, S. Bayati, A. Keshtkar, “Derivation of a formula for induc-tance gradient using intelligent estimation method”, IEEE Transactions on Magnetics Vol. 45, No. 1, pp. 305–308, 2009.

[17] X. Yu, Z. Fan, “Simulation and two-objective optimization of the electromagnetic-railgun model considering vsec resistance and contact re-sistance”, IEEE Transactions on Plasma Science, Vol. 39, No. 1, pp. 405–410, 2010.

[18] N. S. Brahmbhatt, “Design and optimization of an electromagnetic railgun”.

[19] S. A. Taher, M. Jafari, M. Pakdel, “A new approach for modeling electromagnetic railguns”, IEEE Transactions on Plasma Science, Vol. 43, No. 5, pp. 1733–1741, 2015.

[20] F. Deadrick, R. Hawke, J. Scudder, Magrac–“a railgun simulation program”, IEEE Transactions on Magnetics, Vo. 18, No. 1, pp. 94–104, 1982