Reduced Effort Control Laws for Underactuated Rigid Spacecraft

Abstract
Recent results show that a nonsmooth, timeinvariantfeedback control law can be used to stabilizean axi-symmetric rigid body using only two controltorques to the zero equilibrium. This method,however, may require a significant amount of controleffort, especially for initial conditions close toan equilibrium manifold. In this paper we proposea control law which reduces the control effort required.The new control law renders the equilibriummanifold unstable and drives the trajectories of...