Identification and assessment of a simplified model for vehicle ride simulation

Carpinelli, M.; Gatti, G.; Mundo, D.; Gubitosa, M.; Toso, A.
ABSTRACT: This paper proposes a procedure to identify the dynamic parameters of an eight degrees of freedom (8 DOFs) vehicle concept model. A high fidelity model for ride simulations implemented in the commercial multibody code Virtual.Lab Motion has been considered as benchmark. The proposed simplified model is implemented with the help of the multibody libraries in MathworksSimulink environment. In this latter, suspension links are included in a trailing arm configuration in order to take into account the longitudinal to vertical force coupling between the sprung and the unsprung masses during acceleration maneuvers. A non linear least-squares method is used for the identification process with the aim of minimizing the difference in the dynamic behavior between the high fidelity and the simplified vehicle model. The proposed methodology can be used to create and calibrate reliable concept models based on ride simulations or physical tests on predecessor models, thus enabling early concept-phase prediction and optimization of ride performance of new vehicles.

Proc. of ISMA2012-USD2012, Leuven (Belgium), September 17-19 , 2012 Back to Publication List

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