Faculté des Sciences appliquées
Faculté des Sciences appliquées

Development of a vehicle dynamics model including a steering model to support a car-driver interaction PhD

Metzmacher, Xavier ULiège
Promotor(s) : Duysinx, Pierre ULiège
Date of defense : 9-Sep-2019/10-Sep-2019 • Permalink :
Title : Development of a vehicle dynamics model including a steering model to support a car-driver interaction PhD
Translated title : [fr] Développement d’un modèle de dynamique du véhicule incluant un modèle de direction pour soutenir un doctorat portant sur les interactions véhicule-conducteur.
Author : Metzmacher, Xavier ULiège
Date of defense  : 9-Sep-2019/10-Sep-2019
Advisor(s) : Duysinx, Pierre ULiège
Committee's member(s) : Bruls, Olivier ULiège
Delhez, Eric ULiège
Language : English
Number of pages : 138
Keywords : [en] vehicle dynamics model
[en] steering model
[en] steering system
[en] K&C model
[en] tire model
[en] non linear tire model
[en] Pacejka model
[en] yaw slip roll model
[en] body dynamics model
Discipline(s) : Engineering, computing & technology > Civil engineering
Funders : Goodyear Innovation Center Luxembourg
Research unit : Goodyear Innovation Center Luxembourg
Name of the research project : Master thesis in the frame of a car-driver interaction Philosophy doctor
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil mécanicien, à finalité spécialisée en technologies durables en automobile
Faculty: Master thesis of the Faculté des Sciences appliquées


[en] During the tire development process, its handling properties are
first assessed objectively by tests on specific test benches as on track.
Then, professional test-drivers perform some subjective tests on track
to evaluate its performances based on their own feeling.

Here comes the importance of the vehicle-driver interactions understanding,
i.e. the subject of the PhD supported by this Master Thesis,
to answer such questions and adapt the tire to customer needs :
"Which tire characteristic does influence this handling properties?", "Why
is the driver not performing exactly the same maneuver when that tire
parameter is changed?", "What does alter the driver judgment?".

Some studies ongoing in the frame of this PhD had already shown
correlations between subjective and objective assessments. As a results,
a qualitative model was needed to corroborate these correlations,
to link them to tire characteristics and specifications, and to
bring a physical explanation of the phenomena observed.

A theoretical tool, split in the three main blocks listed below,
has then been implemented in MATLAB© during this internship
to bring an analytical approach.

1. A body dynamics model consisting in a modified yaw-slip-roll single
track model. The kinematics and compliance terms will also be
integrated in this model.

2. A steering model, developed in four sub-models of increasing

3. A non linear tire model, defined following the Pacejka ’94 Magic

All together, these blocks built a robust global model able to simulate
a wide range of both open and close-loop maneuvers in the linear
and non linear domains. Moreover, this model helped the study
of tire characteristics influence on these maneuvers by using sensitivity
analyses, which leaded to highlight two tire characteristics
having a big influence on subjective assessments: the rear cornering
stiffness and the pneumatic trail.

Having been validated, this model will now be mostly used in a
large-scale study within the Company, in the frame of Nico Pagliarecci

Lastly, note that none of the parameters value or tire constructions
used in this work to obtain the results presented will be provided explicitly,
to respect the Goodyear confidentiality policy.



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  • Metzmacher, Xavier ULiège Université de Liège > Master ing. civ. méc., à fin.


Committee's member(s)

  • Bruls, Olivier ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques
    ORBi View his publications on ORBi
  • Delhez, Eric ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Mathématiques générales
    ORBi View his publications on ORBi
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