Laboratory-experimental verification of calculation of force effects in tractor's three-point hitch acting on driving wheels

The paper deals with the determination of the tractor wheel load during tillage. Forces acting between tractor and implement significantly change the load of driving wheels. Mathematical description of simple model fails due to impossibility of determination these forces between the tractor and implement. The article describes the multi-body model used for calculation of resultant force and torque acting from the implement on a tractor as well as the forces acting between the wheels and the soil. Paper also shows the results of verification of calculations based on experimental measurements carried out in the laboratory and tests performed under the field conditions.

► Model for calculation of force effects acting on a ploughing tractor is created.
► Forces are calculated on the base of forces measured in a three point hitch.
► Model also calculates forces acting in the contact of wheels with the terrain.
► Multi-body model is 3D and covers TPH kinematics (vertical and side movement).
► Laboratory and field verification experiment was realized.