Estimation of friction coefficient between tire and road surfaces using piezoelectric sensor mounted on tire inner surface

Abstract

As part of the development of intelligent tires, a method for estimating the slip condition between the tire and the road surface was studied. The output waveform of a piezoelectric film attached to the inner surface of the tire was measured when the film passed the contact patch, and it was confirmed that the waveform changed as the slip ratio changed. The results indicated the possibility of estimating the slip ratio by monitoring changes in the voltage peaks corresponding to the entrance and exit of the contact patch.