ADP-Based Spacecraft Attitude Control Under Actuator Misalignment and Pointing Constraints

This article is devoted to real-time optimal attitude reorientation control of rigid spacecraft control. Particularly, two typical practical problems—actuator misalignment and forbidden pointing constraints are considered. Within the framework adaptive dynamic programming (ADP), a novel constrained scheme proposed.In this design, special reward function developed characterize environment feedback deal with constraints. Notably, argument term introduced for overcoming inevitable difficulty in actuator misalignment. By virtue Lyapunov stability theory, ultimate boundedness state error optimality proposed method can be guaranteed. Finally, effectiveness performance ADP-based controller evaluated by not only numerical simulations but also experimental tests hardware-in-loop platform.