Optimal Thruster Configuration for 6-DOF Control of a Small Satellite

TL;DR

This paper identifies optimal thruster arrangements for small satellites that enable full 6-DOF control with minimal total thrust, demonstrating effective maneuverability in simulated rendezvous-docking missions.

Contribution

It introduces a set of thruster configurations capable of full 6-DOF control and finds the minimal-thrust configurations among them for small satellites.

Findings

Viable thruster configurations for 6-DOF control identified.

Minimal total thrust configurations among viable options found.

Reduced thruster count still achieves sufficient maneuverability in simulations.

Abstract

With the growing deployment of small satellites (such as CubeSats, Nanosats, Picosats, and Femtosats) in Low Earth Orbit (LEO) for targeted applications like imaging, communication, data storage, and rendezvous-docking mission, there is increasing attention on orbit maintenance and attitude control. A common approach for active orbit control involves the use of multiple thrusters, which, when properly arranged, can also generate the required torque for attitude control. Starting from a 24-thruster configuration, this paper presents a set of thruster configurations (referred to as a viable configuration group) that enable full six degrees of freedom (6-DOF) control. Further, configuration group that requires minimum total thrust to achieve 6-DOF commands are found among the viable configuration group. One configuration from each of these groups is further evaluated for its attitude control performance through a representative rendezvous-docking mission, demonstrating that even with a reduced thruster count, sufficient maneuverability can be achieved.