Abstract
A method for reducing the angular momentum of a satellite by employing only two-dimensional impulse torques is proposed based on the zero dynamics formulation. The method is useful to recover the case when one of the nominal three thruster jets had failed or to save the consumption of propulsive fuel. The time delay is one of the difficulties in implementation of the present method. This paper shows an index for the robust stabilization of the system including the time delay. Both of the continuous-time and discrete-time systems are considered independently in the course of the analysis.
