Methods for obtaining improvements to the steady-state, pure side-slip Pacejka tire model in capturing conventional and unconventional tire behavior.

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Popat, J. (2015). Methods for obtaining improvements to the steady-state, pure side-slip Pacejka tire model in capturing conventional and unconventional tire behavior. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

Modified codes have been developed to improve semi-empirical tire modeling using the 2002 and MF6.1.2(2012) versions of the steady-state, pure side-slip Pacejka model. The 2012 version, in its pure form, is not suitable to model unconventional tire characteristics. Analysis is performed by examining improvements to handle the effect of change in camber and pressure on lateral force for pure cornering tests. A split optimization method is developed to model the unconventional camber characteristics. Fitting using this method leads to an overall improvement in the quality of the fit. Additionally, a modification of the 2012 Pacejka model is proposed to enable it to model unconventional pressure effects. This further improves the quality of fit, for both, pressure and camber characteristics. Due to the difficulty in obtaining tire data, this model uses the multi-tire test results obtained from the Formula SAE Tire Testing Consortium (TTC). Similarly, the underlying code of this thesis is obtained from the TTC website. The code is dissected into preprocessing, fitting and post-processing and each section is analyzed in detail in order to obtain the best-fit coefficients. The work done in this research can be used as a platform to dive into advanced topics in empirical and semi-empirical tire modeling.

Details
Author

Popat, Jugal

Title

Methods for obtaining improvements to the steady-state, pure side-slip Pacejka tire model in capturing conventional and unconventional tire behavior.

Physical Description

1 online resource (98 pages) : PDF

Date

2015

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

Modified codes have been developed to improve semi-empirical tire modeling using the 2002 and MF6.1.2(2012) versions of the steady-state, pure side-slip Pacejka model. The 2012 version, in its pure form, is not suitable to model unconventional tire characteristics. Analysis is performed by examining improvements to handle the effect of change in camber and pressure on lateral force for pure cornering tests. A split optimization method is developed to model the unconventional camber characteristics. Fitting using this method leads to an overall improvement in the quality of the fit. Additionally, a modification of the 2012 Pacejka model is proposed to enable it to model unconventional pressure effects. This further improves the quality of fit, for both, pressure and camber characteristics. Due to the difficulty in obtaining tire data, this model uses the multi-tire test results obtained from the Formula SAE Tire Testing Consortium (TTC). Similarly, the underlying code of this thesis is obtained from the TTC website. The code is dissected into preprocessing, fitting and post-processing and each section is analyzed in detail in order to obtain the best-fit coefficients. The work done in this research can be used as a platform to dive into advanced topics in empirical and semi-empirical tire modeling.

Genre

masters theses

Subjects--Topics

Mechanical engineering
Automobiles--Design and construction

Degree

M.S.

Keywords

FSAE
Magic Formula
MATLAB
Pacejka Model
Tire Data
Tire Modeling

Subject Area

Mechanical Engineering

Advisor(s)

Tkacik, Dr. Peter
Day, Dr. Kent

Committee Members

Uddin, Dr. Mesbah

Degree Note

Thesis (M.S.)--University of North Carolina at Charlotte, 2015.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Popat_uncc_0694N_11013

Permalink

http://hdl.handle.net/20.500.13093/etd:1384