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Article Dans Une Revue Autonomous Robots Année : 2006

High accuracy path tracking for vehicle in presence of sliding: application to farm vehicles automatic guidance for agricultural tasks

Suivi de trajectoire de haute précision pour les véhicules en présence de glissement: application au guidage automatique d'engins agricoles

Résumé

When designing an accurate automated guidance system for vehicles, a major problem is sliding and pseudo-sliding effects. This is especially the case in agricultural applications, where five-centimetre accuracy with respect to the desired trajectory is required, although the vehicles are moving on slippery ground. It has been established that RTK GPS was a very suitable sensor to achieve automated guidance with such high precision: several control laws have been designed for vehicles equipped with this sensor, and provide the expected guidance accuracy as long as the vehicles do not slide. In previous work, further control developments have been proposed to take sliding into account: guidance accuracy in slippery environments has been shown to be preserved, except transiently at the beginning/end of curves. In this paper, the design of this control law is first recalled and discussed. A Model Predictive Control method is then applied in order to preserve accuracy of guidance even during these curvature transitions. Finally, the overall control scheme is implemented, and improvements with respect to previous guidance laws are demonstrated through full-scale experiments.

Dates et versions

hal-00094468 , version 1 (14-09-2006)

Identifiants

Citer

Roland Lenain, Benoît Thuilot, Christophe Cariou, Philippe Martinet. High accuracy path tracking for vehicle in presence of sliding: application to farm vehicles automatic guidance for agricultural tasks. Autonomous Robots, 2006, 21 (1), pp.79-97. ⟨10.1007/s10514-006-7806-4⟩. ⟨hal-00094468⟩
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