Tire Test Data Analysis and Optimization of Magic Formula Parameter Set
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
This report describes the procedure of a thesis work conducted during the summer of 2005. The purpose of the project was to analyze test data from tire tests performed at VTI in Linköping, and transform the test data into a set of parameters using the Magic Formula as a standard. The tire tests have the purpose of cataloguing the friction properties of a tire at braking and steering, and is an important step in the production of tires as well as vehicles. The work was conducted in the program package Matlab.
The result of the project is an effective way to prepare the chosen test data for an optimization algorithm. The optimization is done by comparing the test data curve, to the curve produced by the parameters in the Magic Formula. The difference between the curves is minimized in order to find the best suitable parameter set. The optimization is conducted using Fmincon in Matlab's Optimization
Toolbox, which has shown to be an effective and sufficient way of handling this type of nonlinear problem. The result of the optimization is a set of Magic Formula parameters that describes the properties of a certain tire during a certain number of circumstances. By using a test set that upholds certain qualities when performing the parameter optimization, the resulting parameters should be able to predict situations that have not yet been tested. In order to perform these predictions an application has been created to make it easier for the user to conduct the data analysis and Magic Formula optimization.
Place, publisher, year, edition, pages
2005. , 80 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-97888ISRN: LITH-ITN-MT-EX--05/056--SEOAI: oai:DiVA.org:liu-97888DiVA: diva2:652959
Subject / course