励磁电流对离子推力器推力变化影响研究

摘要

离子推力器磁场是影响放电室等离子体密度的关键因素之一,在其他参数配合下通过调节磁场对推力进行宽范围精确调节.为了揭示磁场与推力之间的变化关系,从理论分析角度建立励磁电流和推力器推力之间的关系模型,根据理论模型得到的影响趋势,设计并进行了推力调节试验,得到了磁场与推力之间的关系曲线,验证了理论分析的正确性.试验证明,励磁电流对推力变化影响,之间存在非线性关系.%The ion thruster magnetic field is one of the key factors that influence the plasma density in discharge chamber. The thrust wide range throttling can be realized by adjusting the magnetic field. To make clear the relationship between the magnetic field and the thrust,this paper builds the relative model between magnet current and the ion thruster thrust in theory first. On the basis of impact trend obtained by academic model,the thrust regulate experiment is designed and conducted,and then performance maps are formed. The thrust regulate experiment demonstrates that magnet current has influence on the ion thruster thrust indeed,and the relationship is nonlinear.