In this paper, a composite control method, consisting of a feedforward compensation part based on disturbance observer (DOB) and a feedback regulation part based on finite time controller, is proposed for 6DOF spacecraft formation control. The design of the composite controller can be divided into two steps: firstly, a continuous finite time controller is designed to stabilize the closed-loop spacecraft formation control system to a set of two equilibria in finite time in the absence of disturbances; secondly, considering the presence of external disturbances, a DOB is introduced to estimate unknown disturbances. The dynamic and disturbance rejection performances of the closed-loop spacecraft formation control system can be improved. A numerical example is provided to demonstrate the effectiveness of the proposed approach.


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    Title :

    Spacecraft formation control in 6DOF based on finite-time control and disturbance observer


    Contributors:
    Haibin Sun, (author) / Shihua Li, (author) / Shumin Fei, (author)


    Publication date :

    2010-06-01


    Size :

    889178 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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