Modelling the Evolution of Tyre Performance in a Motorsport Application - Analysis of Effects on Vehicle Performance in a Real-Time Simulation Environment
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Typ
Examensarbete för masterexamen
Master Thesis
Master Thesis
Program
Automotive engineering (MPAUT), MSc
Publicerad
2017
Författare
Richardson, Håkan
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The automotive industry use simulation tools to improve their products and increase the rate of development. In order to rely on the simulated results, robust and detailed models are necessary to capture behaviours that would be present in a real setting. This is of particular importance when models are used in driving simulators; a tool which today is considered a necessity within motorsport. The driver then need to know that the feedback provided by the model can be trusted so that realism can be maximised. From a vehicle dynamics and driving experience point of view, detailed tyre models are therefore required, since they act as the interface between vehicle and road. In motorsport, tyres are being used at high stress levels for long periods of time, innevitably causing their visco-elastic rubber to change its properties and thereby affect overall vehicle performance. The driver needs to keep that in mind when handling the car, but also engineers when determining an appropriate suspension setup. Acquiring better understanding of how tyre performance evolve during a session will therefore aid in deriving ways of modifying its enabling factors in simulation environments. It has been understood that it is important to not only consider degradation as abrasive wear, but also as a change of rubber damping and elasticity. Deriving ways of taking this into account was essential for it to provide accurate results. A model consisting of seven submodels has been developed, where one is responsible for distributing the load over the width of the tyre, and one will estimate temperatures of unsprung components that affect tyre performance. The remaining five will model different physical phenomena, which come together to change the car characteristics. It was proven that the subjective experience connected to a change of tyre performance could be replicated in a driving simulator, using the model developed as part of this thesis. The objective comparison was showing similar trends, but would require further tuning and development to reach good correlation.
Beskrivning
Ämne/nyckelord
Transport , Farkostteknik , Transport , Vehicle Engineering