Title :
Finite-time attitude control for spacecraft with actuator misalignment
Author :
Huo Xing ; Hu Qinglei ; Xiao Bing
Author_Institution :
Coll. of Eng., Bohai Univ., Jinzhou, China
Abstract :
A novel attitude stabilization control scheme is presented for spacecraft subject to disturbance and actuator misalignment. A sliding-mode based observer is first designed to reconstruct disturbance torque and the torque introduced by actuator misalignment on-line. It is proved by Lyapuonv analysis that precise reconstruction with zero observer error is achieved in finite time. Together with the system states, the reconstructed information is then used to synthesize a nonlinear controller. The closed-loop attitude system is finite-time stable. The attitude and the angular velocity are stabilized in finite time. Simulation results of an application to a spacecraft are presented to demonstrate the effectiveness of the proposed control scheme.
Keywords :
Lyapunov methods; angular velocity control; attitude control; closed loop systems; control system synthesis; nonlinear control systems; observers; space vehicles; stability; variable structure systems; Lyapuonv analysis; angular velocity; attitude stabilization control; closed-loop attitude system; disturbance torque reconstruction; finite-time attitude control; finite-time stability; nonlinear controller; on-line actuator misalignment; sliding-mode based observer design; spacecraft; zero observer error reconstruction; Actuators; Aerodynamics; Attitude control; Electronic mail; Observers; Satellites; Space vehicles; Spacecraft; actuator misalignment; attitude stabilization; sliding mode observer;
Conference_Titel :
Control Conference (CCC), 2013 32nd Chinese
Conference_Location :
Xi´an