Abstract

This paper mainly confers the development of tracking controller design for wheeled mobile robots with plant uncertainties and external disturbances. This paper proposes a unified and systematic procedure to design adaptive fuzzy tracking controllers for such system. At first an adaptive fuzzy tracking controller (AFTC) is designed for the nonholonomic constrained wheeled mobile robots without considering the model of DC motors. Furthermore, an AFTC and an adaptive type-2 fuzzy tracking controller (AT2FTC) are presented for wheeled mobile robots with the model of DC motors, where the backstepping techniques are adopted. The stability of closed-loop system and the convergence of the proposed tracking controllers are proved by using the Lyapunov and uniformly ultimately bounded stability theories. Finally, several simulation results of adaptive fuzzy tracking and adaptive type-2 fuzzy tracking controlled wheeled mobile robots are executed, where the AT2FTC provides the best tracking performance.

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