CAJ | 학술논문

针对电磁发射对电流波形的平稳性要求，提出了一种基于改进粒子群优化算法（particle swarm opti-mization，PSO）的电磁发射系统电源时序多阶段优化策略。根据脉冲电源时序放电特征，将发射过程分为多个阶段，确定各阶段的划分原则，建立了各阶段脉冲成形网络电源时序优化模型及整个发射过程的时序优化框架。将种群的平均信息引入到粒子速度更新过程中，提出了一种自适应动态调整惯性权重的 PSO。改进的 PSO 根据当前群体的进化状态自动调整惯性权重，使算法具有较强的动态适应性，提高了优化过程中的全局和局部搜索能力。考虑时序初始取值空间过大会导致收敛速度过慢，采用动态缩减搜索空间操作，在新阶段产生的电流波形不能改善时，提高时序取值区间的下限。最后将该优化策略用于某电磁发射系统电源时序的优化设计中，仿真结果表明放电电流曲线非常平稳，而且能够获得较高的出口速度。
침대전자발사대전류파형적평은성요구，제출료일충기우개진입자군우화산법（particle swarm opti-mization，PSO）적전자발사계통전원시서다계단우화책략。근거맥충전원시서방전특정，장발사과정분위다개계단，학정각계단적화분원칙，건립료각계단맥충성형망락전원시서우화모형급정개발사과정적시서우화광가。장충군적평균신식인입도입자속도경신과정중，제출료일충자괄응동태조정관성권중적 PSO。개진적 PSO 근거당전군체적진화상태자동조정관성권중，사산법구유교강적동태괄응성，제고료우화과정중적전국화국부수색능력。고필시서초시취치공간과대회도치수렴속도과만，채용동태축감수색공간조작，재신계단산생적전류파형불능개선시，제고시서취치구간적하한。최후장해우화책략용우모전자발사계통전원시서적우화설계중，방진결과표명방전전류곡선비상평은，이차능구획득교고적출구속도。
In view of the requirement for stable discharge current during electromagnetic launch (EML) process,a multi-stage optimization strategy of discharge sequence based on improved particle swarm optimi-zation (PSO)is proposed.According to the sequential discharge characteristics of pulsed forming network (PFN),the subdivision rules are given for dividing the EML process into multiple stages,and the optimiza-tion model is established.Then the whole optimization framework for the EML process is built.The average information of swarm is introduced into updating process of velocity,and an adaptive PSO with dynamically adjusting inertia weight is proposed.In this PSO,the inertia weight is adjusted according to the evolutionary state of current population with dynamical adaptability in the optimization process,which improves the glob-al and local search capability in every stage.To overcome the defect of slow convergence for unreasonable value space,the method of reducing search space is used which increases the lower limit of the value range when the current shape is not stable in the new stage.Finally the strategy is applied to optimize the discharge sequence of PFN for an EML system,the results show that the current shape is very stable and a higher exit velocity is obtained.