Development and validation of multibody road vehicle simulation models for handling studies
(2009)- Abstract
- Vehicle models are often bound by non-disclosure agreements with manufacturers.
This thesis presents a vehicle model based on vehicle data gathered for the National
Advanced Driving Simulator in Ohio and therefore it is not bound by such limitations
and can be used in future research projects.
The development and validation of the vehicle model requires understanding of the
subsystems studied, component based modelling is therefore used in order to evaluate and validate each subsystem individually
The nonlinear behaviour of vehicle subsystems determines vehicle behaviour at limit
handling manoeuvres, physical suspension and steering models are used in order to
accurately capture geometric... (More) - Vehicle models are often bound by non-disclosure agreements with manufacturers.
This thesis presents a vehicle model based on vehicle data gathered for the National
Advanced Driving Simulator in Ohio and therefore it is not bound by such limitations
and can be used in future research projects.
The development and validation of the vehicle model requires understanding of the
subsystems studied, component based modelling is therefore used in order to evaluate and validate each subsystem individually
The nonlinear behaviour of vehicle subsystems determines vehicle behaviour at limit
handling manoeuvres, physical suspension and steering models are used in order to
accurately capture geometric nonlinearities. A lumped hub compliance model including
normal load compliance is developed and included in the suspension model
Validation of the entire vehicle is performed in quasi-static tests as well as driving
experiments.
Discussion focus is placed on the lumped hub compliance modelling. A differential
compliance formulation is presented in order to circumvent the use of a non-invertible stiffness matrix. Investigations of the effects of lumping elasticities in the wheel hub are performed, as this method is not without its limitations. The lumped elasticity component sees different loads depending on the degree of anti-roll bar engagement, this causes problems with parametrisation of the lumped elasticity as the force-deflection relation differs between bump and roll motions as spring and anti-roll bar loads are not applied at the same location and direction on the suspension. Elastic hub effects on roll centres and jacking forces are also investigated and discussed
Further studies following this work are suggested regarding compliance modelling. The utility of this unrestricted model may be for studies of handling effects on controlled brake or drive systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2077da5f-0dc3-48fb-8ca2-f2f87d03c561
- author
- Fyhr, Pontus LU and Lundahl, Kristoffer
- supervisor
- organization
- publishing date
- 2009-03-18
- type
- Thesis
- publication status
- published
- subject
- pages
- 108 pages
- language
- English
- LU publication?
- yes
- id
- 2077da5f-0dc3-48fb-8ca2-f2f87d03c561
- date added to LUP
- 2025-06-14 09:50:39
- date last changed
- 2025-06-17 16:02:49
@misc{2077da5f-0dc3-48fb-8ca2-f2f87d03c561,
abstract = {{Vehicle models are often bound by non-disclosure agreements with manufacturers.<br/>This thesis presents a vehicle model based on vehicle data gathered for the National<br/>Advanced Driving Simulator in Ohio and therefore it is not bound by such limitations<br/>and can be used in future research projects.<br/><br/>The development and validation of the vehicle model requires understanding of the<br/>subsystems studied, component based modelling is therefore used in order to evaluate and validate each subsystem individually<br/><br/>The nonlinear behaviour of vehicle subsystems determines vehicle behaviour at limit<br/>handling manoeuvres, physical suspension and steering models are used in order to<br/>accurately capture geometric nonlinearities. A lumped hub compliance model including<br/>normal load compliance is developed and included in the suspension model<br/><br/>Validation of the entire vehicle is performed in quasi-static tests as well as driving<br/>experiments.<br/><br/>Discussion focus is placed on the lumped hub compliance modelling. A differential<br/>compliance formulation is presented in order to circumvent the use of a non-invertible stiffness matrix. Investigations of the effects of lumping elasticities in the wheel hub are performed, as this method is not without its limitations. The lumped elasticity component sees different loads depending on the degree of anti-roll bar engagement, this causes problems with parametrisation of the lumped elasticity as the force-deflection relation differs between bump and roll motions as spring and anti-roll bar loads are not applied at the same location and direction on the suspension. Elastic hub effects on roll centres and jacking forces are also investigated and discussed<br/><br/>Further studies following this work are suggested regarding compliance modelling. The utility of this unrestricted model may be for studies of handling effects on controlled brake or drive systems.}},
author = {{Fyhr, Pontus and Lundahl, Kristoffer}},
language = {{eng}},
month = {{03}},
title = {{Development and validation of multibody road vehicle simulation models for handling studies}},
year = {{2009}},
}