Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

Pierre Fabry

Eric Dormegnie

Patrice Fraysse

A method of forecasting the comfort performance in a vehicle equipped with a test mounted assembly in a selected position, traveling at speed V over smooth ground, with a maximum speed Vmax, by establishing a vehicle transfer function where the assembly has a tire with N substantially identical irregularities on its circumference, regularly distributed to excite the vehicle in a range of frequencies, measuring the forces at the wheel center, and multiplying the forces by the vehicle transfer function to forecast the noise and vibrations.

Method of forecasting comfort inside a vehicle equipped with a mounted assembly having non-uniformities

A method for predicting the comfort performance (noise, vibrations) in the cabin of a vehicle fitted with a prototype suspension system when the vehicle is rolling at a given speed on a rolling apparatus made of at least one obstacle, consisting of obtaining an overall transfer function for the vehicle fitted with a reference suspension system, measuring the forces that act at the attachment points of a prototype system, and calculating the noise and vibration outputs by multiplying the overall transfer function by the forces acting at the attachment points of a prototype system.

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Clermont-Ferrand, France

Pierre Fabry