基于单纯形优化法的准方波脉冲形成网络设计

Design of trapezoidal pulse forming network based on simplex optimization method

脉冲形成网络常用于大功率固态调制器、微波驱动源以及激光激励源中,以便获取宽平顶的高压长脉冲输出。针对常用的雷利网络,根据宽平顶低纹波的应用需求,开展了优化设计技术研究,提出了基于单纯形优化法的设计算法。主要针对两种情形进行了优化设计及计算:一是电容值相等,通过优化电感值以获取最优的输出波形;二是约定电容值(电容值不完全相等),通过优化计算不同电容排列下的输出结果,寻求最优的电容排列组合及相应的优化电感值。上述优化算法结果表明,在两种情形下均可以获得较优的准方波脉冲输出,可以为准方波脉冲形成网络的工程实现提供一种新的方法。理论计算和电路仿真结果表明,所提出的方法合理可行。

Pulse forming network(PFN)is often used in high-power solid-state modulator,microwave driver and laser exciter to obtain high voltage and long pulse output with wide flat-top.Aiming at the common used Rayleigh PFN with equal inductor and capacitor,according to the application requirement of wide flat-top and low ripple,the optimal design technology of PFN is studied,and the optimization algorithm based on simplex optimization method is proposed.The work is mainly carried out in two cases:first,the capacitance is uniform,and the optimal output performance is obtained by optimizing the inductance value;second,the capacitors are constrained,and through optimizing the inductance values under different capacitance arrangement,the optimal capacitance arrangement and the corresponding inductance value are worked out.The optimization results show that the quasi-square-wave pulse output can be obtained in both cases.A new method for design and engineering implementation of quasi-square-wave PFN can be provided.The theoretical calculation and circuit simulation results indicate that the proposed method is reasonable and practicable.