Characterization of zero tracking error references in the kinematic control of wheeled mobile robots

Authors:
Luis Gracia;Josep Tornero
Affiliations:
Instituto IDF, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain;Instituto IDF, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain
Venue:
Robotics and Autonomous Systems
Year:
2009

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Abstract

This work establishes the reference signal conditions for zero tracking error when controlling wheeled mobile robots under the kinematic framework, that is, when the low-level dynamics is neglected. The reference characterization is based on the classical decoupled robot control and the inverse kinematics of fixed, centered orientable, castor and Swedish wheels. Procedures to avoid tracking error when a particular condition is not satisfied are also indicated. Simulations are shown to illustrate the reference conditions for each type of mobile robot and their implications. Finally, an industrial forklift is considered in a real situation to validate the previous results and to highlight the limits of the kinematic framework assumption.