A Methodology for Parameter Estimation of Nonlinear Single Track Models from Multibody Full Vehicle Simulation 2021-01-0336
In vehicle dynamics, simple and fast vehicle models are required, especially in the framework of real-time simulations and autonomous driving software. Therefore, a trade-off between accuracy and simulation speed must be pursued by selecting the appropriate level of detail and the corresponding simplifying assumptions based on the specific purpose of the simulation. The aim of this study is to develop a methodology for map and parameter estimation from multibody simulation results, to be used for simplified vehicle modelling focused on handling performance. In this paper, maneuvers, algorithms and results of the parameter estimation are reported, together with their integration in single track models with increasing complexity and fidelity. The agreement between the multibody model, used as reference, and four single track models is analyzed and discussed through the evaluation of the correlation index. The good match between the models validates the adopted simulation methodology both during steady-state and during transient maneuvers. In a similar way, this method could be applied to experimental data gathered from a real instrumented car rather than from a multibody model.
Citation: Galvagno, E., Galfrè, M., Mari, G., Velardocchia, M. et al., "A Methodology for Parameter Estimation of Nonlinear Single Track Models from Multibody Full Vehicle Simulation," SAE Technical Paper 2021-01-0336, 2021, https://doi.org/10.4271/2021-01-0336. Download Citation
Enrico Galvagno, Michele Galfrè, Gianluca Mari, Mauro Velardocchia, Antonio Tota
Politecnico di Torino
SAE WCX Digital Summit
Simulation and modeling
Subscribers can view annotate, and download all of SAE's content.
Learn More »