GEO卫星电推力器安装位置优化研究

Optimization Analysis of Electric Thrusters Installation Location on GEO Satellite

针对配置电推力器的地球静止轨道(GEO)卫星,研究了以位置保持效率为指标的电推力器最佳安装位置。分析了南北、东西位置保持所需推力大小与工作时间的关系,得到推力器安装位置与位置保持可控性的定量关系。分析了电推力器安装位置与角动量卸载能力的关系,电推力器的推力方向越接近垂直,角动量卸载能力越大。以位置保持效率为最优目标,考虑卫星尺寸、位置保持可控性和角动量卸载能力等约束条件,给出了电推力器最优安装位置的确定方法:根据位置保持效率及卫星尺寸约束,确定电推力器纵向与垂向安装位置;根据位置保持可控性和角动量卸载能力等约束条件,确定电推力器横向安装位置。利用一个典型优化算例对此方法进行验证,结果表明:该优化方法能够确定满足约束条件下的电推力器最优安装位置,可为GEO卫星电推进系统的布局设计提供参考。

Aiming at the electric thrusters＇ installation location on GEO satellite,the optimization installation location of electric thrusters based on stationkeeping efficiency is studied.The relationship between operating time and thrust which is needed by NSSK and EWSK is analyzed,then the relationship between stationkeeping controllability and the electric thrusters installation location is given.The relationship between the electric thrusters installation location and angle momentum dumping capability is also analyzed,which reveals that the angle momentum dumping capability achieves maximum when the orientation of two thrusters is orthogonal.The method to determine optimization installation location of the thrusters is introduced,taking into consideration the stationkeeping controllability,angle momentum dumping capability and thrusters size.The longitudinal and perpendicular position is determined by stationkeeping efficiency and satellite size,while the transverse position is determined by the stationkeeping controllability and angle momentum dumping capability.Finally a typical optimization example is provided,which reveals that this method can determine the optimized installation location of the thrusters.This methodcan provide a reference to the electric thrusters layout design.