MODELLING OF TRACTOR-POTATO PLANTER COMBINATION DYNAMICS IN ASPECT OF VEHICLE MOTION STEERABILITY

The paper presents a mathematical model concept, which may be used for analyzing the behavior of tractor – agricultural machine combinations at the preliminary design stages. The model is based on 2D so called bicycle models (two-wheeled) that are often referred to in the literature, but it is significantly modified because third axle was added. The model has been applied to a tractor – potato planter combination. The measurements of behavior tractor - potato planter combination during traffic were conducted to model parameters identification. The modern, specially worked out apparatus kit was using during test. Obtained results enable to estimate influence of tractor – potato planter combination parameters on its behavior on the road.