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München, Germany

Fischer R.,Tesis Dynaware GmbH | Butz T.,Tesis Dynaware GmbH | Ehmann M.,Tesis Dynaware GmbH | Vockenhuber M.,Magna Powertrain AG and Co KG

The increasing number and complexity of mechatronic control systems in vehicles means that they can no longer be developed and adjusted without the assistance of simulation models and tools. A contribution to this is made by the driver model from Tesis Dynaware, which allows various driver types to be simulated. In the evaluation of traction control systems for all-wheel vehicles from Magna Powertrain, it was possible to successfully meet high demands such as that for control over the vehicle under low friction coefficient conditions. The results for the adjustment of all-wheel systems show good behaviour with regard to subjective evaluation by experienced test drivers and according to objective development criteria. Source

Butz T.,Tesis Dynaware GmbH | Simeon B.,TU Munich | Stadler M.,Bain and Company Switzerland Inc.
Journal of Computational and Nonlinear Dynamics

The calibration of complex simulation models for vehicle component and controller development usually relies on numerical methods. In this contribution, a two-level optimization scheme for estimating unknown model parameters in a commercial real-time capable vehicle dynamics program is proposed. In order to increase the reliability of the model coefficients estimated from reference data, the measuring test is improved by methods for the optimal design of experiments. Specifically, the control variables of the experimental setup are adjusted in such a way as to maximize the sensitivity of the parameters in demand with respect to the objective function. The numerical results show that this two-level optimization scheme is capable of estimating the parameters of a multibody suspension model. © 2010 by ASME. Source

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