基于过程集成的电磁轨道炮脉冲电源多目标优化

Process-Integration Based Multi-Objective Optimization for Pulsed Power Supply of Electromagnetic Guns

利用数值仿真方式研究电磁轨道炮脉冲电源系统——多级电容储能系统。首先利用系统仿真软件Simplorer V7搭建脉冲电源模型,进而仿真观察发射过程。弹丸发射速度和脉冲电源系统效率是设计者最关注的两个目标,而导轨及电枢材料又限制了弹丸的最大加速度,因此有必要找出在一定储能下的最佳参数配合(弹丸质量、各级储能段触发时间),使得弹丸发射速度最大,同时系统有较高的效率。本文基于过程集成的思想,使用优化软件iSIGHT,应用解决多目标优化问题的优秀算法——NSGA-II来求解上述的多目标问题的Pareto最优解。优化后的参数配置明显提升了发射速度,同时提高了系统效率。Pareto解集的多样性也给设计者在权衡速度和效率时更大的选择范围。在优化结果的基础上,对弹丸质量、触发间隔与发射速度、系统效率之间的关系做了进一步的讨论。

A capacitor-based pulsed power system（PPS）,which is used to drive the electromagnetic gun,is studied with numerical simulation.The transient electric circuit model for PPS is built using system analysis software Simplorer V7 to simulate the launching process.The launching speed and the system efficiency are two most remarkable objectives,while the rail material limits the maximum acceleration of the projectile.So it is meaningful to find the optimal parameters,i.e.the mass of projectile and trigger time delay,to pursue both the highest launching speed and the highest system efficiency with the given energy storage.In this paper,the process integration software iSIGHT,in which the elite multiobjective algorithm NSGA-II is integrated,is used to automatically execute the key steps in the optimization process and find the Pareto-optimal set for the above problem.With the optimized parameters,both the launching speed and the system efficiency are significantly improved.Meanwhile,the diversity of the Pareto-optimal set enables a wider range of choices while balancing the speed and the efficiency.On the basis of the optimization results,several meaningful qualitative discussions are carried out on the relationship between the armature mass and triggering delay,and the launching speed and the system efficiency.