Efficient high-accuracy north-south station-keeping strategy for geostationary satellites

• 作 者: HUANG XuXing YANG Bin LI Shuang WANG ZhenBo
• 机 构: College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Depa
• 出 处: 中国科学：技术科学（英文版）
• 发表日期: 2021年11期
• 关键词: geostationary orbit north-south station-keeping long-period oscillation fuel-opt

Station-keeping (SK) is indispensable in actual geostationary (GEO) satellite missions.Due to the luni-solar gravity perturba-tions,the inclination of a GEO satellite suffers the issues of secular drift and long-period oscillation.Current north-south (NS)SK strategies maintain the GEO satellite,s orbit with high accuracy but low fuel efficiency.In this work,an efficient high-accuracy NS-SK strategy is developed for the GEO satellites.First,an averaging method is employed to decrease the accu-mulation of the secular drift within a one-solar-day SK cycle,while the long-period oscillation caused by the solar gravity is damped to further improve the orbital accuracy using the impulse and finite-thrust propulsions.Second,we contribute a fuel-optimal cycle that reduces the fuel consumption and a fixed-interval cycle that executes SK control in fixed time interval every day to further enhance the proposed NS-SK strategy.Numerical simulations show that the improved strategy can achieve high-accuracy NS-SK with little fuel consumption.Moreover,results also demonstrate that the fixed-interval cycle can reach higher NS-SK accuracy while consuming less fuel.