Application of the Hohenheim Tyre Model for Driving Comfort Investigations of Agricultural Tractors
- Publication Type
- Contribution to conference
- Authors
- Bürger, A.; Böttinger, S.; Kutzbach, H.D.;
- Year of publication
- 2017
- Published in
- Proceedings of the 19th International & 14th European-African Regional Conference of the ISTVS
- Editor
- ISTVS
- ISBN / ISSN / eISSN
- 978-1-942112-49-5
- Conference name
- 19th International & 14th European-African Regional Conference of the ISTVS
- Conference location
- Budapest
- Conference date
- 25.-27.09.2017
- Keywords
- Ackerschlepper, Fahrdynamik, Fahrkomfort, Reifenmodell
State of the art agricultural tractors are increasingly used for a wide range of tasks. These include traditional farming tasks on the field as well as heavy transport tasks with farming background but also for construction work. With this development, requirements on driving safety and driving comfort are continuously tightened by the legislative authorities. Especially topics regarding the occupational safety of the driver are addressed. This includes stricter equirements on the driver’s exposure intensity and time to whole-body vibrations.
The objective evaluation of a vehicle’s driving comfort is usually based on acceleration measurements in the driver’s cabin and on the driver’s seat. This paper aims to evaluate the driver’s exposure to whole-body vibrations on a simulative basis. For this purpose, a whole vehicle simulation model of a test tractor is set up. Since agricultural tractors are used under different circumstances, a test conducted on a standard roadway was implemented in the simulation model to make simulation results reproducible and comparable. The Hohenheim Tyre Model is part of the simulation model described. Its stability on complex tracks like the standard roadway as well as its ability to reproduce the excitations on the vehicle on this track are especially focussed in this research. With the whole vehicle simulation model of the test tractor, its driving comfort is evaluated based on international and European Union standards. The Hohenheim Tyre Model is able to reproduce the tyre force excitations on the vehicle in both the time and frequency domain according to related research results. With the wheel hub excitations, it is possible to calculate the driver’s exposure to whole-body vibrations. Additionally, the influence of the front axle suspension on the acceleration amplitudes was investigated. In a successive project, the approach presented is applied to evaluate the influence of different undercarriage systems of an agricultural tractor on the driving comfort.