Tires are an integral part of ground vehicles, and the only parts of the car that are in contact with the ground. The research on developing and analyzing off-road tire models require the construction of new tools that are able to generate off-road conditions in a controlled laboratory environment. Several virtual rigs for tire model evaluation have been created for the purpose of developing new tire models. Finite element models of the rolling drum and tire setup have also been created to duplicate the experimental tests done in the laboratory for the evaluation of tire slip characteristics. The main motivation of this study is to develop a model to determine the feasibility of tests which will be conducted on the physical rig, protecting the equipment as well as the operator from dangers. By running tests on the virtual rig, it will be possible to, for example determine whether the actuator has the response time to actually induce the desired slip ratio and slip angles and whether the actuators will saturate in the effort of doing so. Moreover, the virtual rig will actually help correlate the parameters governing the tractive forces coming from the tires and develop newer and more complete tire models, as well as validate new and more complete tire-soil interaction contact models. The virtual rig will be used in tandem with the actual rig, in situations where actual tests will be carried out on the real rig, and simulations will be run to match the data acquired via experimentation. With that, the rig can also be used to acquire the parameters and shape factors of existing tire models, even for off-road and ice conditions. In addition to that, the rig can also be used to synthesize new control algorithms to control sideslip and longitudinal slip in tires, where the loads can be applied in a transient manner and the tire rotation be controlled to optimize traction.
Development of a virtual terramechanics rig (VTR) for experimental validation
Entwicklung eines virtuellen geländemechanischen Prüfstandes (VTR) für experimentelle Validierungen
2006
7 Seiten, 15 Bilder, 11 Quellen
Conference paper
English
Development of a Virtual Terramechanics Rig (VTR) for Experimental Validation
SAE Technical Papers | 2006
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