Modeling agricultural machines is quite different from modeling cars or trucks. The tyres fulfill the duty of the suspension. There is no spring-damper-system like in a car and commonly used tyre models do not deliver satisfying results.
Furthermore agricultural machines work on soft ground, which makes a realistic model grow in complexity.

In a Rhineland-Palatinate founded project with the title »Simulation von Betriebslasten zur Auslegung mechanischer Systeme« solutions are worked out by exploring these effects. The company »JOHN-DEERE« runs extensive tests on test tracks to gain informations about accelaration, paths, forces, strains and the location of the vehicle on the test track.

These data are used to optimize the models for the tyre, the ground and the crop chopper, which were developed at the ITWM. Once the model has been optimized and verified in this way, effects of constructive changes can be easily analysed.