Matthew A Cooper
Air Force Research Laboratory, USA
Title: Nonlinear extended least squares adaptive feedforward control of a disturbed satellite across multiple maneuvers
Biography
Biography: Matthew A Cooper
Abstract
Two adaptive approaches for a non-linear feedforward controller are combined with and sinusoidal trajectory planners in a spacecraft attitude control system. Physics-based feed-forward control, trajectory generation, observers, feedback control, and system stability are discussed in relation to the nonlinear dynamics under simulation. Th e adaptive feedforward controllers compared include a Recursive Least Square (RLS) method and an Extended Least Squares (ELS) method. A large slew maneuver, a target tracking maneuver, and zig-zag maneuvers are performed and analyzed. Using the RLS method as a baseline, potential improvements gained by incorporating an ELS method are illustrated.