Abstract: For electric propulsion geosynchronous satellites, orbit station-keeping can be carried out by electric propulsion layout with double robotic arms, and each robotic arm is equipped with one electric thruster. In this paper, a parsing-oriented approach is used to orbit station-keeping, and the East-West/North-South Station-Keeping maneuver is achieved by firing 1~2 times a day. The ignition direction remains unchanged for several days. Firstly, the station-keeping algorithm with analytical form is studied under the normal condition of double arms and thrusters. Then, a failure scheme based on the single arm with only one electric thruster is researched. Finally, a method to measure the efficiency of different vector mechanism capability and thruster specific impulse is given analytically. The simulation results show that the control accuracy can meet the requirements for geosynchronous satellites station-keeping, multi-GEO satellites collocation and fixed-point orbit injection.

Key words: station-keeping, orbital control using electric propulsion, geosynchronous orbit, low-thrust control