Title :
Variable Structure Control for Flexible Spacecraft
Author :
Guang-Xing Li ; Jun Zhou ; Feng-Qi Zhou
Author_Institution :
Coll. of Astronaut., Northwestern Polytech. Univ., Xi´an, China
Abstract :
This paper focuses on designing control system to improve attitude control accuracy in the presence of mass parameter uncertainties and disturbances. The control algorithm based on variable structure control is obtained by Lyapunov stability theory and have the following properties: 1) computational simplicity and tuning on line, 2) high attitude control accuracy in the presence of bounded external disturbances and parameter uncertainty. Stability of close-loop system is analyzed based on Lyapunov equation and the properties of the quaternion representation of spacecraft dynamics. These stability conditions serve as constrains imposed on the parameter of controller. Simulation results show the good attitude stable characteristics of proposed control.
Keywords :
Lyapunov methods; aircraft control; attitude control; closed loop systems; flexible structures; space vehicles; stability; uncertain systems; variable structure systems; Lyapunov equation and; Lyapunov stability theory; attitude control; close-loop system stability; control system design; flexible spacecraft; mass parameter disturbances; mass parameter uncertainties; quaternion representation; spacecraft dynamics; variable structure control; Aerodynamics; Attitude control; Control systems; Equations; Lyapunov method; Space vehicles; Stability; Torque control; Uncertain systems; Weight control; Attitude Control; Flexible Spacecraft; Variable Structure Control;
Conference_Titel :
Control Conference, 2006. CCC 2006. Chinese
Conference_Location :
Harbin
Print_ISBN :
7-81077-802-1
DOI :
10.1109/CHICC.2006.280813
