Authors:
Roland Lenain
1
;
Ange Nizard
2
;
Mathieu Deremetz
1
;
Benoit Thuilot
2
;
Vianney Papot
1
and
Christophe Cariou
1
Affiliations:
1
Irstea, Technologies and Information Support System Research Unit, 9 avenue Blaise Pascal, CS 20085, 63178 Aubière and France
;
2
Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand and France
Keyword(s):
Adaptive Control, Four-wheel-steering Mobile Robot, Path Following, Agriculture, Off-road.
Related
Ontology
Subjects/Areas/Topics:
Informatics in Control, Automation and Robotics
;
Mobile Robots and Autonomous Systems
;
Robotics and Automation
;
Vehicle Control Applications
Abstract:
This paper proposes a path tracking control algorithm dedicated to off-road mobile robots equipped with two steering axles. Four wheel steering mobile robot allows to enhanced motion capability with respect to classical car-like mobile robot, while reducing the friction induced by the skid-steered architecture. In particular, such a kinematic structure makes it possible to independently control the robot heading and its position, or to increase turning capabilities. In this paper, a strategy is developed in order to reduce the space required when achieving manoeuvres around a desired trajectory. Contrarily to classical point of view, expressing a relationship between the front and rear wheels, the control laws here proposed aim at following the same path for the front and the rear centre of the axle. The robot is then split into two subsystems, regulating two lateral deviations with respect to a desired trajectory.