Research on the movement smoothness of a wheeled mobile agricultural vehicle

Abstract

The article presents the results of an experimental study of the movement smoothness characteristics of an
agricultural truck, moving at different speeds on high-quality asphalt-concrete (dynamometer) and dirt roads with a
horizontal longitudinal profile. The characteristics of the vertical oscillations of the sprung and unsprung masses of the vehicle
are investigated as a function of the root-mean-square accelerations and spectral density. Implementing the results of the study
obtained on the dynamometer, the rate of amplification of vehicle mass oscillations on a dirt road is estimated depending on
the speed of movement and the change in the air pressure in the tires. It is substantiated that by reducing the tire pressure, the
intensity of vertical oscillations of the masses when the vehicle moves on a dirt road is significantly reduced.