基于集总参数模型的电磁轨道炮激励电流仿真

Simulation Research on Triggering Current for Electromagnetic Railgun Based on Applied Model

电磁轨道炮激励电流仿真是研究轨道炮系统性能的基础和核心,基于电磁轨道炮系统等效电路,对轨道炮的脉冲电源、轨道、电枢、电枢和轨道的滑动电接触等分系统分别建模,形成集总参数的电磁轨道炮数学模型。采用Dommel-EMTP算法,对电源中各脉冲形成单元电流和电压求解,进而得出系统的总激励电流、电枢运动的速度、位移等参数。与实测数据对比,激励电流和电枢炮口速度仿真结果相对误差均不超过4%,验证了模型的准确性,为轨道炮系统的进一步研究奠定基础。

Simulation research on triggering current is the kernel of electromagnetic railgun investigation,based on its equivalent electric circuit,the models of pulsed power,rail,armature,sliding electrical contact between armature and rail are established,and the electromagnetic railgun simulation model is established by integrating the component models together.By means of Dommel-EMTP(electromagnetic transient program)algorithm,the triggering current and voltage of every pulse forming unit are simulated,then the total discharging current,velocity and displacement of armature are solved.Compared with the tested date,the relative error of simulation results of total discharging current and armature muzzle velocity is less than 4%,which indicates the effectiveness and accuracy of the model and provides basic method for further research on electromagnetic railgun.