Conception et mise en oeuvre d'un système de propulsion par impulsion électromagnétique
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Dans ce travail, nous pr�sentons la conception optimis�e et la mise en oeuvre d'un syst�me EMP � impulsions de petite taille, portable et aliment� par condensateur. Le syst�me EMP � un et deux �tages est mod�lis� math�matiquement et simul� � l'aide d'un mod�le par �l�ments finis afin d'analyser les relations entre le courant de la bobine d'excitation, la force exerc�e sur le projectile et la position relative du projectile. La simulation est utilis�e pour identifier l'instant de d�clenchement optimis� pour le deuxi�me �tage. Un prototype exp�rimental de syst�me EMP � impulsions aliment� par condensateur, portable et � un ou deux �tages, a �t� d�velopp�. Le dispositif exp�rimental est utilis� pour valider les r�sultats de la simulation, optimiser les param�tres de conception du syst�me et identifier l'instant de d�clenchement optimal du deuxi�me �tage. Pour les param�tres donn�s du prototype exp�rimental d�velopp�, la vitesse maximale enregistr�e �tait de 25 m/s, ce qui est nettement sup�rieur aux r�sultats r�cemment rapport�s pour une conception fixe de canon � bobine aliment� par condensateur.
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