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This paper addresses the robust attitude control for an uncertain flexible spacecraft with disturbances bounded by ellipsoids. An observed-state feedback is designed using the so-called invariant ellipsoid method, which is based on the local invariant set theorem. The minimum invariant ellipsoid can be considered as the influence of the uncertainties and disturbances in the controlled system. All...
Based on a creative sliding mode prediction model, a novel sliding mode observer (SMO) design method for discrete-time nonlinear uncertain systems is presented in this paper. By combining feedback correction approach, the observer states can close to system states as exactly as possible, and chattering is eliminate simultaneously. Because of the employing of receding horizon optimization technique,...
Disturbance observer (DOB)-based controller design is one of the most popular methods in the field of motion control. This paper presents a design method for the disturbance observers to satisfy closed loop performance specifications, provided that the main feedback controller is known. Unlike the conventional methods, the proposed DOB design method takes into account the influence from not only disturbance...
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