@article{ref1,
title="Study of the longitudinal slip and side slip of a wheeled tractor under variable vertical load",
journal="Heavy vehicle systems",
year="1995",
author="Russev, RG and Nhu, DT and Todorov, TI and Petrov, IL",
volume="2",
number="3-4",
pages="270-284",
abstract="This paper describes a theoretical and experimental study of an agricultural tractor subject to harmonic excitations, and the effects of such a road input on the tractive performance and the lateral stability of a tractor. The tractor is represented by a two-degree-of-freedom model for evaluation of the vertical displacement of the wheels. Two nonlinear models are used to describe the longitudinal wheelslip and side slip angles. A hydraulic driven exciter mounted on the rear part of the tractor is used to simulate the harmonic input. Under these conditions a tractor fitted with pneumatic tyres was tested and the vibrations of the wheel and wheelslip were measured. It is shown that the variable normal road reaction exerts a negative effect on the tractive performances of the tractor, and that this should be taken into account when predicting and analysing the dynamic characteristics of the tractors.<p />",
language="",
issn="1351-7848",
doi="",
url="http://dx.doi.org/"
}