Computer simulation of tractor single-point drawbar performance

A computer algorithm has been developed to predict single-point drawbar performance of a tractor taking into account all the necessary variables during field operation. The performance of tractor-implement system with a single-point hitch involves the effect of a number of variables on the whole tractor-implement-soil system. Considering all these, the developed computer algorithm is able to predict the performance of whole operation. This model is capable of determining the maximum pull available in the given field condition and matches the performance of trailed implements, such as a disc harrow and two-axle trailer. The model was able to predict maximum load and slope climbing ability of tractor with single- and two-axle trailers under different conditions. It was predicted by the model that the maximum pull developed by a tractor is limited by gross traction in the soft soil whereas it was limited by the power available from the tractor in hard soil. The longitudinal stability of the tractor taken for analysis varied with hitch point position. Appropriate determination of disc harrow performance was possible using the developed model. (C) 2004 Silsoe Research Institute. All rights reserved Published by Elsevier Ltd.