Influence of Understeer Gradient Variation during Cornering in the Vehicle Stability Perception

Francisco Ganzarolli; Alexandre Tibério J. de C. Leal

doi:10.4271/2014-36-0209

Drive a vehicle through corners is a very complex activity, since it means change of movement states. Considering a typical corner, the driver starts in a transient state, changes to a steady state and again changes to transient.

Those variations make the vehicle change its behavior due specific suspension and steering characteristics. The idea of this paper is show how only one of those characteristics, the understeer gradient, have influence in the stability perception of the driver.

The focus is show how the understeer gradient variation can induce perception of low stability in vehicle when cornering no matter the vehicle still keeps its correct path. This variation means an understeer gradient “acceleration”, the metric human being can perceive, in other words the feeling of stability or its lack of.

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Influence of Understeer Gradient Variation during Cornering in the Vehicle Stability Perception 2014-36-0209

SAE MOBILUS