Robust adaptive tracking control of omnidirecitonal wheeled mobile manipulators

This paper addresses the trajectory tracking problem for an redundantly-actuated omnidirectional mobile manipulator system with uncertainties and disturbances. The proposed algorithm is robust adaptive control strategy and the parameter estimates are tuned online. First, for designing controller, the conservative upper-bounded function of dynamic model of omnidirectional mobile manipulator system is derived based on the dynamic structure properties. Then, a robust adaptive control scheme is presented to ensure trajectory tracking effect of this closed-loop system. The asymptotical stability is verified a Lyapunov method. Finally, simulation examples are given to demonstrate the proposed approach can guarantee the whole system converge to the desired manifold with prescribed performance.

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