Method for determining the International Roughness Index (IRI) of a roadway

摘要

A method for determining the International Roughness Index (IRI) of a roadway by means of a vehicle (100) comprising at least one wheel suspension (101) and at least one sensor (102) for determining the excitation of the wheel suspension (101) from a starting position, described. The method includes the steps of moving the vehicle (100) along the roadway; the speed v of the vehicle (100) is determined as a function of time; by means of the sensor (102) for determining the deflection of the suspension, the deflection of the suspension is determined as a function of time; the sensor data is sampled at a predetermined time step Ts daq; the surface profile of the road is estimated based on the determined speed v of the vehicle and the determined deflection of the suspension as a function of time using an inverse vehicle model taking into account parameters of the vehicle; and determined based on the estimated surface profile of the roadway using a vehicle model of the IRI.