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The significance of high-order dynamics in lap time simulations

The significance of high-order dynamics in lap time simulations
The significance of high-order dynamics in lap time simulations
This work aims to study which level of detail should be preserved in the multi-body modelling of a racing car in order to obtain reliable results without excessive model complexity. Three multibody models have been developed and compared through optimal control simulations. The models differ from each other for the order of dynamics comprised: starting from a 14 degrees of freedom (dof) car which includes chassis and wheels motion, a 10 dof model model is obtained by neglecting the wheels hop dynamics, finally a 7 dof model is derived by completely eliminating the suspension motion. Optimal control problem simulations, including parametric analyses varying the center of mass position and suspensions stiffness, have been executed on a full lap on the International circuit of Adria. Simulations results show that the 10 dof model gives almost the same results of the 14 dof one, while significantly reducing the computing time. On the contrary, the basic 7 dof model highlights remarkable differences in both the parametric analysis, suggesting the dynamics has been over-simplified.
Lot, Roberto
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Dal Bianco, Nicola
8bd1d29c-cce5-407d-82c5-e88504417658
Lot, Roberto
ceb0ca9c-6211-4051-a7b8-90fd6f0a6d78
Dal Bianco, Nicola
8bd1d29c-cce5-407d-82c5-e88504417658

Lot, Roberto and Dal Bianco, Nicola (2015) The significance of high-order dynamics in lap time simulations. IAVSD 2015: 24th International Symposium on Dynamics of Vehicles on Roads and Tracks, Austria. 17 - 21 Aug 2015.

Record type: Conference or Workshop Item (Paper)

Abstract

This work aims to study which level of detail should be preserved in the multi-body modelling of a racing car in order to obtain reliable results without excessive model complexity. Three multibody models have been developed and compared through optimal control simulations. The models differ from each other for the order of dynamics comprised: starting from a 14 degrees of freedom (dof) car which includes chassis and wheels motion, a 10 dof model model is obtained by neglecting the wheels hop dynamics, finally a 7 dof model is derived by completely eliminating the suspension motion. Optimal control problem simulations, including parametric analyses varying the center of mass position and suspensions stiffness, have been executed on a full lap on the International circuit of Adria. Simulations results show that the 10 dof model gives almost the same results of the 14 dof one, while significantly reducing the computing time. On the contrary, the basic 7 dof model highlights remarkable differences in both the parametric analysis, suggesting the dynamics has been over-simplified.

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ConferencePaper - The significance of high-order dynamics in lap time simulations.pdf - Accepted Manuscript
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More information

Published date: 17 August 2015
Venue - Dates: IAVSD 2015: 24th International Symposium on Dynamics of Vehicles on Roads and Tracks, Austria, 2015-08-17 - 2015-08-21
Organisations: Energy Technology Group

Identifiers

Local EPrints ID: 379472
URI: http://eprints.soton.ac.uk/id/eprint/379472
PURE UUID: 1e7346a7-d9fa-4df8-ad7c-fb7d8aea6921
ORCID for Roberto Lot: ORCID iD orcid.org/0000-0001-5022-5724

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Date deposited: 30 Jul 2015 13:18
Last modified: 14 Jun 2018 00:29

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