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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2015

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Modeling and control of a skid-steering mobile platform with coupled side wheels

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Tchoń K. , Zadarnowska K. , Juszkiewicz Ł. , Arent K.

tom Vol. 63, nr 3

807--818

This study is devoted to the modeling and control of a 4-wheel, skid-steering mobile platform with coupled side wheels, subject to lateral and longitudinal slips. The dynamics equations of the platform are derived, and 16 variants of motion distinguished. For the variant of motion allowing for all possible slips of the wheels two control problems are addressed: the motion planning problem and the trajectory tracking problem. The former problem is solved by means of a Jacobian motion planning algorithm based on the Endogenous Configuration Space Approach and, complementarily, using the Optimal Control Approach. The Nonlinear Model Predictive Control is applied to the latter problem. Performance of these control algorithms is illustrated by a sort of the parking problem. Significant robustness of the predictive control algorithm against the model uncertainty is revealed.