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A position control differential drive wheeled mobile robot

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3 Author(s)
Yongoug Chung ; Sch. of Automotive Eng., Chinju Coll., South Korea ; Chongkug Park ; Harashima, F.

For more accurate path tracking of a four-wheeled two-degrees-of-freedom mobile robot (WMR), a position control algorithm is proposed with two separated feedback loops, a velocity feedback loop and a position feedback loop. In the most conventional position control system of a WMR, internal error is mainly considered, while external error has, as yet, hardly been treated, although it plays an important role in accurate position control. This external error is caused by unexpected environmental situations. The proposed control algorithm is designed to compensate for both internal error and external error. This algorithm makes it possible to accurately follow the designed trajectory

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Industrial Electronics, IEEE Transactions on  (Volume:48 ,  Issue: 4 )