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This paper investigates on motion synchronization of a multiple axes system. Two different control strategies, a cross-coupling controller in feedback loop and a linear quadratic optimal controller, were used to synthesize the synchronization compensator with the cross-coupling dynamics among the axes. These two methods are corresponding to SISO and MIMO approaches. With the strategies, the asymptotic...
An adaptive control strategy is developed for spacecraft attitude tracking maneuvers, in the presence of structured uncertainty in the spacecraft inertia parameters. The proposed strategy incorporates a composite parameter update law, which guarantees global asymptotic stability of the overall closed-loop system. A stability analysis is performed using Lyapunov's direct method, in conjunction with...
Repetitive control (RC) is a feedback-based approach useful for tracking periodic reference trajectories, for example in scanning applications. The major challenges with RC include closed-loop stability, robustness, and minimizing the steady-state tracking error. In piezo-based nanopositioning systems, the hysteresis effect can limit the performance of RC designed based on a linear dynamics model...
This paper deals with the design of a robust adaptive fuzzy tracking control for a class of uncertain and disturbed nonlinear systems. In addition to the desired performances and the convergence of the tracking error, the proposed approach guarantees the uniformly ultimately boundedness of the resulting closed-loop system. Furthermore, it allows overcoming many problems related to adaptive fuzzy controllers...
In this paper, a novel control scheme based on the variable universe fuzzy control and Hinfin control for improving the robustness of the designed controller is developed for a class of nonlinear systems preceded by the hysteresis nonlinearity. The controller guarantees the boundedness of all variables in the close-loop systems and convergence of the plant output to a given reference signal. To design...
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