In this article, the circuit model and the dynamic model of railgun launching process are established by analyzing the Lorentz force, air resistance, and friction force of the armature in the gun bore. Based on the armature dynamic model, a muzzle velocity model of armature can be simulated by utilizing MATLAB, which takes the launching current and loading force of railgun as the main input parameters. Through those two input parameters, the variation curve of armature velocity is measured and calculated by using the armature muzzle velocity model. Moreover, we can read the armature muzzle velocity from the armature variation curve. The influencing factors of the muzzle velocity of armature in this model are also calculated and analyzed, respectively. Comparing with the armature muzzle velocity measured by net target and B-probe, the result shows that the armature muzzle velocity model can accurately estimate the armature muzzle velocity, and can be used to calculate the muzzle velocity in the railgun launching experiment. This method provides reference for the performance optimization design of railgun.

中文翻译：

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基于轨道炮电流的电枢初速建模与测量方法


本文通过分析炮膛内电枢的洛伦兹力、空气阻力和摩擦力，建立了轨道炮发射过程的电路模型和动力学模型。基于电枢动力学模型，以轨道炮发射电流和装弹力为主要输入参数，利用MATLAB仿真电枢初速模型。通过这两个输入参数，利用电枢初速模型测量并计算电枢速度的变化曲线。此外，我们可以从电枢变化曲线中读取电枢初速。对该模型中电枢初速的影响因素也分别进行了计算和分析。与网靶和B探头测量的电枢初速进行对比，结果表明电枢初速模型能够准确估计电枢初速，可用于轨道炮发射实验中电枢初速的计算。该方法为轨道炮性能优化设计提供参考。