This article investigates the problem of improving control performance during flexible spacecraft maneuvers, hampered by system uncertainties, environmental disturbances, and flexible vibrations. A fixed-time disturbance observer-based prescribed performance predictive control method is proposed. First, a nonlinear second-order fully actuated discrete system model is introduced to characterize the dynamic behavior and nonlinearities of the spacecraft attitude control system. The fixed-time disturbance observer is employed to estimate and compensate for the lumped disturbances. Subsequently, an incremental second-order fully actuated predictive model is established using a Diophantine equation to replace reduced-order equations. Further, an optimal controller is obtained through multistep ahead prediction, which considers constraints on attitude tracking performance and prescribed performance. Additionally, a necessary and sufficient condition is provided to analyze the tracking performance and stability of the closed-loop system. Finally, numerical simulations of flexible spacecraft maneuvering and attitude tracking validate the effectiveness.
Fixed-Time Disturbance Observer-Based Attitude Prescribed Performance Predictive Control for Flexible Spacecraft
IEEE Transactions on Aerospace and Electronic Systems ; 60 , 3 ; 3209-3220
01.06.2024
2536111 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch