Spacecraft Position and Attitude Control with Theta-D Technique
Spacecraft position and attitude control with θ-D technique
A new optimal control approach, Theta-D technique, is employed to control the position and altitude of a spacecraft accurately m order to capture and remove large space targets. Spacecrafts are required to be able to perform large position and angle maneuvers: their dynamics are highly nonlinear. To control this highly nonlinear dynamic system, we formulate it as a nonlinear optimal regulator problem. The proposed Theta-D technique can give an approximately closed-form suboptimal controller in the sense that it obtains an approximate solution to the Hamilton-Jacobi-Bellman (HJB) equation through a perturbation method. By adjusting perturbation terms, asymptotic stability can be achieved in the large and the system transient performance can also be tuned in a flexible way. Compared with the popular SDRE technique, this approach does not need on-line computations of algebraic Riccati equation. With high-dimensioned systems, this feature presents a tremendous implementation advantage. A six degree of freedom simulation of the spacecraft and target are used to demonstrate the effectiveness of the Theta-D controller.
M. Xin et al., "Spacecraft Position and Attitude Control with Theta-D Technique," Proceedings of the 42nd AIAA Fluid Dynamics Conference and Exhibit Proceedings (2012, New Orleans, LA), American Institute of Aeronautics and Astronautics (AIAA), Jun 2004.
42nd AIAA Fluid Dynamics Conference and Exhibit, AIAA ARC (2012: Jun. 25-28, New Orleans, LA)
Mechanical and Aerospace Engineering
Keywords and Phrases
Bellman Theory; Hamilton-Jacobi Equation; Control Systems Design; Optimal Control; Satellite Orientation; Space Debris; Spacecraft Maneuvers; Transient Response
Article - Conference proceedings
© 2004 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.
28 Jun 2004