航天器表面电位主动控制方法可行性的数值仿真分析

Numerical Simulation Analysis on Feasibility of Active Control of Spacecraft Surface Potential

目的:为了研究在航天器表面发射电子束、离子束和低温等离子体对航天器表面电位控制的有效性.方法:基于航天器表面带电等效电路模型和电流平衡方程建立了表面电位随时间变化的微分方程,利用该方程以MATLAB为平台编程模拟航天器表面电位在一定时间段内的动态变化,仿真分析发射电子束、离子束控制航天器表面电位的有效性并且分析发射低温等离子体时控制航天器表面电位的可行性.结果:航天器表面发射合适的电子束流和离子束流可以有效降低航天器表面电位,进而分析得到发射低能等离子体时也能有效降低航天器表面电位.结论:在航天器上发射导电粒子束可以降低航天器表面电位,仿真结果对航天器表面电位主动控制技术的研究具有一定指导意义.

Purpose:To study the effectiveness of electron beam,ion beam and low temperature plasma to the spacecraft surface potential control.Method:Based on the equivalent circuit model and current balance equation,a differential equation of surface potential varies with time is established.Using MATLAB as programming platform,the equation is applied to simulate the dynamic changes of spacecraft surface potential over a certain period of time.The simulation analysis proves the effectiveness of electron beam,ion beam to the spacecraft surface potential control and the feasibility of low temperature plasmao the spacecraft surface potential control is verified.Result:By emitting appropriate electron beam and ion beam on spacecraft surface,the spacecraft surface potential can be effectively reduced.And further analysis indicates that emitting low temperature plasma on the spacecraft surface can also effectively control surface potential.Conclusion:Emitting conductive particle beams on the spacecraft can reduce the spacecraft surface potential,the simulation results have certain guiding significance for the research on active control of spacecraft surface potential.