30cm氙离子推力器磁场特性分析与优化设计  

Magnetic field characteristics analysis and optimization design of 30cm xenon ion thruster

作　　者：胡竟[1] 王亮[1] 张天平[1] 江豪成[1] 

机构地区：[1]兰州空间技术物理研究所真空技术与物理国家级重点实验室,兰州730000

出　　处：《中国空间科学技术》2017年第5期60-67,共8页Chinese Space Science and Technology

基　　金：装备预先研究项目基金(414230605XX);国家自然科学基金(61601210)

摘　　要：放电室磁场设计直接影响放电室的放电稳定性及推力器在轨工作寿命,针对多种工作模式下30cm氙离子推力器磁场设计的复杂性问题,对推力器电磁体磁场向永磁体磁场转换中放电室的磁场特性进行了研究,并对永磁体磁场的关键参数进行优化设计。建立30cm氙离子推力器放电室磁场转换的磁路模型,运用有限元分析理论,利用实际工程数据验证磁路模型计算结果的正确性与方法的可行性。在此基础上,分析获得给定磁路构型下产生要求磁感应强度的永磁体关键尺寸。以放电室工作阳极震荡电压、减速栅极电流、加速栅极电流和磁路系统质量为目标,采用多目标粒子群优化算法,对永磁体的关键参数进行优化,得到30cm氙离子推力器设计性能目标下的磁路构型最优结果。本研究可为高效、稳定工作的离子推力器磁路设计及优化提供方法。The magnetic field design directly influences the stability and the in-orbit life of the discharge chamber.Aiming at the complexity of the 30 cm xenon ion thruster magnetic field design in variety of operating modes,the magnetic circuit characteristics was analyzed during the conversion between the electromagnet and permanent magnet.And the key parameters of the permanent magnet were optimized.The magnetic circuit model of the 30 cm xenon ion thruster was established,combined with the finite element method,the effectiveness and feasiblity of this method was validated by compared with the job sitedata.Based on this model,the key parameters of the permanent magnet which could produce requested magnetic induction intensity were obtained.Then the key parameters of the permanent magnet were optimized by using multiobjective particle swarm optimization（MPSO）algorithm, with the goal of the minimum anode shock voltage,accelerator grid current,decelerator grid current and magnetic circuit system weight system,and the relevant optimal result of magnetic circuit configuration for 30 cm xenon ion thruster was observed.Above research will certainly provide a method for the design and optimization of the ion thruster.

关 键 词：离子推力器 电磁体 永磁体 磁路模型 优化设计 

分 类 号：V439.4[航空宇航科学与技术—航空宇航推进理论与工程]