Title :
Retrospective cost adaptive spacecraft attitude control using control moment gyros
Author :
Camblor, Marc ; Cruz, G. ; Esteban, S. ; Leve, Fred A. ; Bernstein, D.S.
Author_Institution :
Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
We present a numerical investigation of the performance of retrospective cost adaptive control (RCAC) for spacecraft attitude control using control-moment-gyroscopes (CMG). The setup consists of three orthogonally mounted CMG´s that are velocity commanded without the use of a steering law. RCAC is applied in a decentralized architecture; each CMG is commanded by an independent RCAC control laws. This architecture simplifies the required modeling information and treats the axis-coupling effects as unmodeled disturbances. A rotation-matrix parameterization of attitude is used to implement a dynamic compensator with state feedback. The adaptive controller is able to complete various slew and spin maneuvers using limited information about the mass-distribution of the spacecraft.
Keywords :
adaptive control; attitude control; decentralised control; gyroscopes; space vehicles; state feedback; adaptive controller; attitude rotation-matrix parameterization; axis-coupling effects; control moment gyros; decentralized architecture; dynamic compensator; independent RCAC control laws; retrospective cost adaptive spacecraft attitude control; slew maneuvers; spin maneuvers; state feedback; unmodeled disturbances; velocity commanded CMG; Angular velocity; Attitude control; Markov processes; Space vehicles; Torque; Vectors; Wheels; Direct adaptive control; Nonlinear systems; Spacecraft control;
Conference_Titel :
American Control Conference (ACC), 2014
Conference_Location :
Portland, OR
Print_ISBN :
978-1-4799-3272-6
DOI :
10.1109/ACC.2014.6859136
