In this paper, we propose an adaptive finite-time control for spacecraft proximity operations (SPO) regarding to external disturbance, parametric uncertainty as well as actuator saturation. Firstly, a six degree of freedom model is constructed to describe the relative motion relationship between the target spacecraft and pursuer spacecraft. To address the challenge of external disturbance and parametric uncertainty, a finite-time controller based non-singular integral terminal sliding mode is designed. With the help of the adaptive technique, the prior knowledge of the upper bound on the compound disturbance is not required. Subsequently, to deal with the actuator saturation, a dead-zone operator based model is employed. Based on Lyapunov stability theorem, the developed controller can ensure that the tracking errors converge to the origin after finite time. Last but not least, simulations are made to intuitive verify the validity of the introduced control method.


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    Title :

    Adaptive Finite-Time Tracking Control for Spacecraft Proximity Operations under Actuator Saturation


    Contributors:
    Liu, Kang (author) / Wang, Yu (author) / Ji, Haibo (author)


    Publication date :

    2020-09-01


    Size :

    1778566 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English