High Accuracy Orbit Control Strategy of Change’4-Relay Satellite

In order to ensure the long-term stable operation of the satellite in orbit, the Change’4-relay satellite has put forward a very high requirement for the orbit control accuracy. Aiming at the incremental error around thrust direction, quantization error of sampling interval, thrust error of engine and zero deviation of accelerometer, this paper formulated the installation layout optimization of thruster, sampling quantization error suppression, thruster after-effect suppression and zero deviation suppression of accelerometer respectively. The in-orbit control results show that the control strategy makes the orbit control accuracy exceed the target requirements and extends the satellite’s in-orbit life simultaneously.