Spacecraft pointing control is an essential technology for all robotic and manned spacecraft. A control system consists of sensing, actuation, and the dynamics of the spacecraft itself. Spacecraft control systems are of many types, but in this chapter, we will be concerned only with three axis pointing. We will use reaction wheels for actuation.
Reaction wheels are used for control through the conservation of angular momentum. The torque on the reaction wheel causes it to spin one way and the spacecraft ...