论文部分内容阅读
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 design of the discharge chamber’s magnetic field has a direct impact on the discharge stability of the discharge chamber and the working life of the thrusters. In view of the complexity of the design of the 30cm xenon ion thruster magnetic field in a variety of operating modes, The magnetic field characteristics of the discharge chamber were studied, and the key parameters of the permanent magnet field were optimized. The magnetic circuit model of the 30cm xenon ion thruster discharge chamber was established. The finite element analysis theory was used to verify the correctness of magnetic circuit model calculation and the feasibility of the method. Based on this, the critical dimension of the permanent magnet with the required magnetic flux density under a given magnetic circuit configuration is obtained. Aiming at the anode oscillation voltage, deceleration grid current, acceleration grid current and magnetic circuit system, the multi-objective particle swarm optimization algorithm was used to optimize the key parameters of the permanent magnet, and the design performance of 30cm xenon ion thruster was obtained The best magnetic circuit configuration under the target. This study provides a method to design and optimize the magnetic circuit of an ion thruster with high efficiency and stability.