电磁轨道炮运行阶段系统发射效率和电枢出膛动能研究

摘要

For analyzing the influences of certain major parameters on system performance of a constructed electromagnetic railgun,based on the fast solving method of the launching process for the electromagnetic railgun and the automatic computing method for the triggering strategy of the capacitive pulsed power supply,the influence of the armature mass,the number of the pre-charged pulse forming unit (PFU) and the pre-charge voltage of the PFU capacitor and the ripple ratio of the rail current on the system launch efficiency and the armature muzzle kinetic energy are quantitatively analyzed by parameter sweep.The single-objective optimal solutions of these two indices and the bi-objective Pareto front between them are acquired in genetic algorithm.In general,when the major parameters change,the system launch efficiency and the armature muzzle kinetic energy all tend to present a unimodal distribution.Meanwhile,there exist tradeoffs between these two performance indices.The research methods and the results discussed in this paper have a positive effect on analyzing the variation trends of the system performance and acquiring the comprehensive optimal solution of the major parameters under various operational requirements.%为了研究电磁轨道炮运行阶段关键参数对系统性能的影响,基于发射过程快速求解方法和触发策略自动计算方法,采用参数扫描的方式分析系统发射效率和电枢出膛动能随电枢质量、准备使用的脉冲形成单元(PFU)数、PFU电容预充电压和轨道电流波动幅度的变化趋势,并采用遗传算法求解发射效率和电枢出膛动能的单目标最优解和双目标Pareto前沿.总体而言,系统关键参数变化时,发射效率和电枢出膛动能均呈单峰变化趋势,并且彼此制衡.该研究方法和结论,对于在不同发射需求(即不同系统参数)下研究系统性能的变化趋势、实现发射效率和电枢出膛动能的双目标最优,有积极的指导意义.