Boundary output feedback control of a flexible spacecraft system with input constraint

Vibration suppression of an Euler–Bernoulli beam by backstepping iterative learning control

“…The existing literature on control of the Euler–Bernoulli‐beam‐like system are extensive [6–16]. Under the high precision requirement, active control is highly motivated, among which boundary control is employed by numerous researches due to its low demand on sensors and actuators.…”

“…The observer is also a popular way to deal with the disturbance. Observers are introduced to estimate unknown time‐varying environmental disturbances on flexible systems under deflection rejecting and trajectory tracking tasks [13–16]. Numerous other approaches have been proposed to deal with unknown disturbances.…”

Constrained Adaptive Neural Control for Air-Breathing Hypersonic Vehicles without Backstepping

“…Also a linear auxiliary system is adopted for the backstepping scheme [25] and the disturbance observer-based feedback linearization control [26]. Moreover, an novel hybrid auxiliary system is designed to solve the problem of the nonsymmetric nonlinear input constraints [27], and it has been applied to the AHV systems [28,29] and the flexible spacecraft systems [30]. However, these antiwindup methods can only be applied in some specific control scheme such as the backstepping control.…”

“…However, these antiwindup methods can only be applied in some specific control scheme such as the backstepping control. Regardless of the linear auxiliary system [25,26] or the hybrid auxiliary system [27][28][29][30], it is not suitable to be extended to the high-order forms. Since a high-order auxiliary system is required for the altitude subsystem under the proposed control scheme, a novel nonlinear auxiliary system is constructed.…”

“…(2) Compared with the linear auxiliary system [25,26] and the hybrid auxiliary system [27][28][29][30], the nonlinear auxiliary system proposed in this paper can be extended to the high-order forms and applied to the altitude subsystem under the proposed control scheme. Moreover, the parameter tuning for the proposed auxiliary system is relatively easy.…”