Control of a class of uncertain nonlinear systems which can be decoupled by state-variable feedback is considered. A variable-structure-control (VSC) law is derived so that in the closed-loop system the output variables asymptotically track given output trajectories in spite of any uncertainty in the system. On the basis of this result, a control law is derived for the attitude control of an orbiting spacecraft in the presence of uncertainty using reaction jets. The controlled outputs are the three Euler angles which describe the orientation of the spacecraft relative to an orbital frame. Simulation results are presented to show that, in the closed-loop system, precise attitude control is accomplished in spite of the uncertainty in the system.
Nonlinear decoupling sliding mode control and attitude control of spacecraft
Nichtlineare Entkopplung von Regelungen mit gleitendem Mode und Lageregelung von Raumfahrzeugen
IEEE Transactions on Aerospace and Electronic Systems ; 25 , 5 ; 621-633
1989
13 Seiten, 34 Quellen
Aufsatz (Zeitschrift)
Englisch
Spacecraft attitude sliding mode control method design
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