A Multi-constraint Autonomous Orbit Control Scheme for Formation Flight

In order to improve the autonomous operation capability of the long-life satellite with dual satellite autonomous formation flight function requirements during its lifetime, a multi constraint autonomous orbit control scheme for formation flight is proposed. First, the thruster optimization sequence is determined according to the satellite centroid change and thruster installation. Second, real-time hydrazine amount of each thruster is calculated and thus the thruster and target attitude for this orbit control task is able to be settled. Third, both real-time thrust and post-control thrust are estimated by the pressure sensor, followed by thrust coefficient calibration via the measurement of semi-major axis. Experimental results have been verified in orbit that our method can realize autonomous orbit control tasks in various working conditions such as accompanying flight, flying around, and holding point maintenance. Hence, this control scheme can be extended to future satellite networking, which is of great significance.