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.


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    Title :

    Fixed-Time Disturbance Observer-Based Attitude Prescribed Performance Predictive Control for Flexible Spacecraft


    Contributors:
    Liu, Quan-Zhi (author) / Zhang, Liu (author) / Sun, Bo (author) / Xiao, Yang (author) / Fan, Guo-Wei (author)


    Publication date :

    2024-06-01


    Size :

    2536111 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English