单级感应线圈炮最佳初始位置仿真研究

Simulation and Analysis of Single Stage Induction Coilgun's Best Initial Position

在单级感应线圈炮的发射过程中,影响电磁发射效率的因素有很多,弹丸初始位置就是其中之一。以驱动线圈和弹丸的初始中心距为变量,以弹丸所能达到的最大速度为目标函数,采用轴对称线圈磁场的数值计算方法和微分方程的前向差分法,对单级感应线圈炮系统进行了仿真研究;研究的结果表明,对于给定的单级感应线圈炮系统,确实存在一个最佳的初始位置,使得弹丸的速度能达到最大。并且,通过仿真计算,得出了该最佳初始位置,这为以后的工程实践提供了理论参考。

There are many factors which affect the efficiency of electromagnetic launch during the launch of the single stage induction coilgun, and the initial position of the projectile is such a one. In this paper the single stage induction coilgun is simulated and analyzed by the numerical value calculation method for axisymmetric coil＇s magnetic field and the forward difference procedure for differential equation, by taking the maximal velocity of projectile as target function and taking the initial space of the centers of the driving coil and projectile as variable. The research result indicates that the best initial position which can make the projectile get the maximal velocity really exists in a given single stage induction coilgun system. The best initial position of the given single stage induction coilgun system is gained by simulation, which provides the theoretical reference for future engineering practice.