Inverse dynamic load distribution identification for a passenger car tire using vibration responses

摘要

The problem of reconstructing the dynamic spatial distribution of transient contact loads exciting a non-linear structure using vibration response measurements is studied. These response measurements are combined with a model that is representative in the frequency range of interest for inverse characterization of the loads. The implementation of two approaches is presented, focusing on the specific time and spatial properties of the input force and the structure. A deterministic inverse technique using impulse responses, together with L-curve Tikhonov regularization, is compared to the stochastic technique of the Augmented Kalman Filter (AKF). A priori knowledge on the spatial distribution of the loads is exploited to enhance the input estimation quality. The presented methodologies are implemented for a high-fidelity full-3D FE model of a passenger car tire rolling with constant velocity on a rough road.