Abstract
This paper presents a new adaptive flight control system using the backstepping method for a future space transportation system. A space transportation system using the backstepping method can be constructed with an expansion of a control system using feedback linearization with time-scale separation. It is difficult to obtain prior knowledge in detail, such as that regarding the aerodynamic forces and moments, and wind disturbances. Furthermore, the necessity of the derivative of pseudo-input is considered an issue in control systems using the backstepping method. Therefore, in this study, making use of a disturbance observer, we propose a method which can estimate dynamic properties of a vehicle and the derivative used as pseudo-input. Moreover, we attempt to guarantee the stability of the entire system, including the estimation mechanism, controller, and vehicle dynamics. We conducted numerical simulations to verify the effectiveness and robustness of the proposed system.
