Title :
Feedforward and feedback control for flexible spacecraft based on perturbation estimation
Author :
Cen, Xiaofeng ; Wang, Qingchao ; Ma, Xingrui
Author_Institution :
Astronautics Sch., Harbin Inst. of Technol., China
Abstract :
A feedforward and feedback control method for rest-to-rest maneuvers of flexible spacecraft is presented, with the objective insensitivity to modeling errors, parameter uncertainty, and minimizing the residual energy of the flexible modes. The feedforward control law is based on perturbation estimation, input-shaping design, and the use of basic conditions of the rigid-body modes with additional final conditions, i.e. zero-coupling moment and zero-coupling moment-derivative, which lead to forming of a boundary-value problem, and solved using an update algorithm. The feedback control law was proposed to gain the desired attitude, which designed for the rigid body modes. The capability of this design is demonstrated through a numerical example in which with the proposed method, there is able to eliminate the residual energy and robust to modeling errors.
Keywords :
boundary-value problems; control system synthesis; feedback; feedforward; perturbation techniques; space vehicles; boundary-value problem; feedback control law; feedforward control law; flexible spacecraft; input-shaping design; perturbation estimation; update algorithm; Aircraft manufacture; Algorithm design and analysis; Control systems; Feedback control; Iterative algorithms; Robust control; Robustness; Shape control; Space vehicles; Vibration control;
Conference_Titel :
Intelligent Control and Automation, 2004. WCICA 2004. Fifth World Congress on
Print_ISBN :
0-7803-8273-0
DOI :
10.1109/WCICA.2004.1343784