Active control of the dynamics of a dual-spin spacecraft

Abstract

Active damping of both vehicle nutation and payload flexibility for a dual-spin spacecraft is achieved using the interaction of the vehicle dynamics with the on-board despun payload control system. A closed-form solution to the interaction problem is presented, deriving an analytical expression which is used to establish both the fundamental stability and the strength of the coupling. Analysis of the characteristics of the interaction leads to mass property and control system design criteria which can be used to effectively optimize the interaction and provide substantial active control. Design examples are presented which illustrate the design techniques involved in the optimization. Simulation results are presented which verify the analytical conclusions.