L2-gain Stabilized Attitude Control for Combined Spacecraft

In this paper, an attitude controller based on L
₂
-gain stabilization is proposed for a combined spacecraft, consisting of a server spacecraft, non-cooperative target and manipulators as the connection. Firstly, consuming that the connection between the server and target spacecraft is fixed, a novel modeling method based on interaction torque for the attitude dynamics of combination system is investigated. Then, a robust L
₂
-gain stabilized attitude controller without spacecraft inertia parameters is proposed. Finally, numerical simulations verifies the effectiveness and superior performance of the resulting controller.