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A Tire Stiffness Backstepping Observer Dedicated to All-Terrain Vehicle Rollover Prevention

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Abstract:

Most active devices focused on vehicle stability concern on-road cars and cannot be applied satisfactorily in an off-road context, since the variability and the non-linearities of tire/ground contact are often neglected. In previous work, a rollover indicator devoted to light all-terrain vehicles accounting for these phenomena has been proposed. It is based on the prediction of the lateral load transfer. However, such an indicator requires the on-line knowledge of the tire cornering stiffness. Therefore, in this paper, an adapted backstepping observer, making use only of yaw rate measurement, is designed to estimate tire cornering stiffness and to account for its non-linearity. The capabilities of such an observer are demonstrated and discussed through both advanced simulations and actual experiments.

Keywords: ALL-TERRAIN VEHICLES; BACKSTEPPING OBSERVER; ROLLOVER PREVENTION; TIRE CORNERING STIFFNESS

Document Type: Research Article

DOI: https://doi.org/10.1163/156855308X344828

Affiliations: 1: Cemagref, 24 avenue des Landais, BP 50085, 63172 Aubière Cedex, France 2: LASMEA, 24 avenue des Landais, 63177 Aubière Cedex, France cISRC, Sungkyunkwan University, Suwon, South Korea 3: LASMEA, 24 avenue des Landais, 63177 Aubière Cedex, France cISRC, Sungkyunkwan University, Suwon, South Korea and Cemagref, 24 avenue des Landais, BP 50085, 63172 Aubière Cedex, France

Publication date: 2008-10-01

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