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.
Fixed-time rendezvous control of spacecraft with a tumbling target under loss of actuator effectiveness
IEEE Transactions on Aerospace and Electronic Systems ; 52 , 4 ; 1576-1586
2016-08-01
943175 byte
Article (Journal)
Electronic Resource
English
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