CONTROL OF FLEXIBLE SPACECRAFT USING NONLINEAR APPROXIMATION OF INPUT SHAPE DEPENDENCE ON REORIENTATION MANEUVER PARAMETERS

摘要

This paper presents a design of a novel advanced feedforward controller for a large-angle reorientation maneuver of a spacecraft with flexible appendages, such as a telecommunication satellite. The controller computes an optimal feedforward input shape for a nonlinear flexible system by using Radial Basis Function (RBF) network approximation of the feedforward dependence on the maneuver parameters. The paper describes a flexible spacecraft testbed and studies application of the controller to the testbed control. The designed controller is demonstrated to combine excellent compensation of residual flexible vibrations and computational simplicity.