北京航空航天大学学报2026，Vol.52Issue(5)：1476-1486,11.DOI:10.13700/j.bh.1001-5965.2024.0180
加速栅小孔对变推力离子推力器性能影响的实验研究
Experimental study on effect of aperture of accelerator grid on performance of variable thrust ion thruster
摘要
Abstract
Ion thrusters have been widely used in attitude and orbit control missions of long-duration spacecraft because of their outstanding advantages of high specific impulse and long life.A comprehensive experimental study was carried out to investigate the effect of the accelerator grid compensation coefficient on the performance of the continuous variable thrust ion thruster to achieve a large range and high precision thrust regulation.The mechanism and influencing factors of accelerator grid compensation design were analyzed.Based on 10cm diameter continuous variable thrust ion thrusters,two types of grid systems with different accelerator grid compensation coefficients were designed.The effects of accelerator grid compensation coefficients on a wide range of discharge characteristics of the ion thruster plasma in the discharge chamber,electron backflow limited voltage and acceleration current,ion beam distribution and ion sputtering etching effect were studied under different thrust modes.Two types of grid systems with varying accelerator grid compensation coefficients were devised based on continuous variable thrust ion thrusters with a diameter of 10 cm.The result shows that under constant total acceleration voltage,changing the accelerator grid compensation coefficient can adjust the basic performance of the discharge chamber and the density distribution of the ion beam.And the smaller the thrust,the more pronounced the effect of the compensation coefficient variation.At a wide range of variable-thrust operating points,the accelerator grid compensation coefficient variation has a significant effect on the ion sputtering erosion effect of the ion beam on the grid system,but it has little effect on the electron backflow limited voltage of the grid system.It can be improved by adjusting the total acceleration voltage.The above research will provide technical support for the matching design of the grid system of a prototype ion thruster and optimization of high-performance variable-thrust control strategies,facilitating the illustration and implementation of such systems.关键词
加速栅小孔中心距补偿系数/变推力/离子推力器/溅射刻蚀/放电损耗Key words
acceleration grid aperture pitch compensation coefficients/variable-thrust/ion thruster/sputtering erosion/discharge loss分类
航空航天引用本文复制引用
胡竟,郭德洲,耿海,杨福全,李建鹏,陈娟娟..加速栅小孔对变推力离子推力器性能影响的实验研究[J].北京航空航天大学学报,2026,52(5):1476-1486,11.基金项目
国家重点研发计划(2021YFC2202704) （2021YFC2202704）
国家自然科学基金(62371213) （62371213）
甘肃省自然科学基金(22JR5RA787,22JR5RA789,22JR5RA784)National Key Research and Development Program of China(2021YFC2202704) （22JR5RA787,22JR5RA789,22JR5RA784）
National Natural Science Foundation of China(62371213) （62371213）
Natural Science Foundation of Gansu Province(22JR5RA787,22JR5RA789,22JR5RA784) （22JR5RA787,22JR5RA789,22JR5RA784）
