Patent ID: 6691002
Filing Date: 2004-02-10
Classification: G01H,G01M

Abstract:
A method for predicting the comfort performance in the cabin of a vehicle fitted with a prototype suspension system comprising a tire and a wheel, which suspension system has body attachment points, when said vehicle is rolling at a given speed V on rolling means comprising on the surface at least one obstacle of predetermined size, said determination method consisting:firstly, in obtaining an overall transfer function for the vehicle fitted with a reference suspension system having body attachment points by measuring factors selected from the group consisting of the noise and vibration levels inside the vehicle when it is rolling at speed V on the rolling means provided with the obstacle and determining by means selected from the group consisting of measuring and calculating with the aid of a functional numerical model the forces that act at the attachment points to the body of the same reference suspension system while rolling at the same speed V on the same rolling means provided with the obstacle; secondly, determining by means selected from the group consisting of measuring and calculating with the aid of a functional numerical model the forces that act at the body attachment points of the prototype suspension system under the same rolling conditions as those previously used for the reference suspension system; and lastly, calculating the outputs selected from the group consisting of noise and vibrations in the vehicle by multiplying the vehicle's overall transfer function by the forces acting at the body attachment points of the prototype suspension system.