Tracking Rigid Body Motion Using Thrusters and Momentum Wheels

We develop tracking control laws for a rigid spacecraft using both thrusters and momentum wheels. The model studied comprises a rigid body with external thrusters and with N rigid axisymmetric wheels controlled by axial torques. The thruster torques and the axial motor torques are the controls used to track given attitude motions. Specifically, the thruster torques are used to implement the coarse tracking, and the momentum wheels are used to provide the fine control