电容储能型脉冲电源分时分段触发策略自动计算方法

An Automatic Calculation Method for the Triggering Strategy of the Capacitive Pulsed-Power Supply

提出一种基于Matlab数值计算平台、针对电磁轨道炮发射过程的快速求解方法,并以此为基础提出一种兼具准确性和普适性、针对电容储能型脉冲电源分时分段触发策略的自动计算方法。首先给出电磁轨道炮的电路模型,给出发射过程中各机电物理量的表达式;其次阐述发射过程求解方法所采用的离散时间步长思想、电源负载解耦思想和具体实现方法;进而阐述触发策略的确定依据和计算方法的具体实现;最后以一个具有典型代表性、初始储能为4 MJ的系统为例,通过对比Simplorer仿真结果,验证上述方法的可行性和准确性。结果表明,自动计算方法得到的触发策略能够使导轨电流波形呈近似平顶波,快速求解方法得到的电枢出膛速度与Simplorer仿真结果之间的相对误差低于3%,验证了该方法的有效性。

Based on Matlab platform,a fast solving method for the launch process of the electromagnetic railgun is proposed. By using this method,an automatic calculation method for the triggering strategy of the capacitive pulsed-power supply is then proposed, which possesses the advantages of both accuracy and applicability. The circuit model of the electromagnetic railgun system is firstly analyzed and the mathematical expressions of the relevant electrical and mechanical quantities are also given. Then the time discretization idea,the circuit decoupling idea and the specific implementation of the fast solving method are elaborated in detail.And the basic principle and the specific implementation of the automatic calculation method are also discussed.Finally,a typically representative system with 4 MJ initial energy is given. The feasibility and accuracy of these two methods are proven through the comparison with the Simplorer simulation results which are confirmed to be compliant with the real system. Results show that the rail current waveform is approximate to a flat wave under the action of the triggering strategy acquired from the automatic calculation method,and the relative error of the armature launch velocity between the Simplorer simulation result and the Matlab calculation result is within 3%.These results confirm the feasibility and accuracy of the above methods.