At last, the theories of these spark plugs were analyzed and an optimized spark plug structure was obtained.This research will be of benefit for the reliable operation of pulsed plasma thruster.

• 最后分析了三种火花塞的点火机理，获得了较好放电性能的火花塞结构形式，为脉冲等离子体推力器的稳定运行提供了重要的依据。