09 Nov
09/11/2021 14:00

Sciences & Société

Soutenance de thèse : Luc LAROCHE

Caractérisation de l’inconfort induit par les vibrations d’un volant automobile sous la sollicitation du groupe motopropulseur

Doctorant : Luc LAROCHE

Laboratoire INSA : LVA

Ecole doctorale : ED162 : Mécanique, Energétique, Génie Civil, Acoustique de Lyon

Due to technological advances in transportation and the overall increase in comfort, car manufacturers aimed to transform the act of driving into an interactive and sensory experience. Among the various interactions between the driver and the vehicle, vibrations transmitted by the steering wheel are among the first sources of vibratory stimulation. Goals of car manufacturers are therefore multiple: characterize the vibratory source, work on reducing it emissivity and evaluate its influence in terms of comfort. In the literature, the discomfort generated by vibrations due to a road deformation or a wheel balancing problem has been widely treated. However, there is only few information on the discomfort generated by the engine vibrations. This PhD therefore aims at characterizing the discomfort induced by the vibrations of the steering wheel, according to two main topics: the mechanical coupling between the driver and the steering wheel and the influence parameters of the vibrations on discomfort. This document summarizes the work done during this PhD, providing solutions to improve the estimation of vibrations at the driver/vehicle interface and its influence on the sensation. All the work presented was carried out at the Belchamp technical center of the Stellantis Group and on the facilities of the Laboratoire Vibration et Acoustique of INSA Lyon engineering school.