Identification of Parameters of the Agricultural Rubber Crawler Vehicle by Using the Measured Dynamic Loading Forces Acting on the Track Rollers

Abstract

In this study, the dynamic spring constant k and the viscous damping coefficient c of a rubber crawler, expressible in the form of a Fourier series from a previous study, were identified based on experimental results by the Levenberg-Marquardt method. Dynamic loading forces acting on second-and third-track rollers among four track rollers were employed for identification of k and c from comparison between the simulated vibration characteristics of agricultural rubber crawler vehicle using k, c obtained by exciting test and experimental ones. Next, the validity of the simulations after and before identification of and was discussed. As a result, the accuracy of simulation by using identified k, c was improved. Furthermore, it was suggested to be necessary to extend the non-linear mechanical model from a linear in order to conduct an more accurate simulation of driving a rubber crawler vehicle.