This paper investigates the fixed-time fault-tolerant control problem of spacecraft rendezvous and docking with a freely tumbling target in the presence of external disturbance and thruster faults. More specifically, based on the attitude of the target spacecraft, a line-of-sight coordinate frame is defined first, and the dynamical equations relative to the tumbling target are derived to describe the relative position (not six degrees of freedom). Then two fixed-time position controllers are proposed to guarantee that the closed-loop system is stable in finite time in the sense of a fixed-time concept, even in the presence of simultaneous external disturbance and thruster faults. Numerical simulations illustrate that the chaser spacecraft can successfully perform the rendezvous using the proposed controllers.


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    Title :

    Fixed-time rendezvous control of spacecraft with a tumbling target under loss of actuator effectiveness


    Contributors:


    Publication date :

    2016-08-01


    Size :

    943175 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English