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Extended Brush Tyre Model to Study Rolling Loss in Vehicle Dynamics Simulations
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH Royal Institute of Technology.ORCID iD: 0000-0001-6339-1043
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-1426-1936
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-4048-3452
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0001-8928-0368
2017 (English)In: International Journal of Vehicle Design, ISSN 0143-3369, E-ISSN 1741-5314, Vol. 73, no 4, p. 255-280Article in journal (Refereed) Published
Abstract [en]

This paper describes a semi-physical tyre model that enables studies of rolling loss in combination with vehicle dynamic simulations. The proposed model, named extended brush tyre model (EBM), takes the effects of driving conditions, wheel alignment, and tyre materials into account. Compared to the basic brush tyre model, EBM includes multiple numbers of lines and bristles as well as integrated rubber elements into the bristles. The force and moment characteristics of the model are shown to have a good correlation with the Magic Formula tyre model and experimental data. The numerically estimated rolling resistance coefficients under different conditions are compared to findings in the literature, FE-simulations and experiments. The model can capture some aspects that are not covered by the available literature and experimental observations such as camber effect on rolling loss. EBM can be used as a platform for future studies of rolling loss optimisation using active chassis control.

Place, publisher, year, edition, pages
InderScience Publishers, 2017. Vol. 73, no 4, p. 255-280
Keyword [en]
EBM; extended brush tyre model; rolling loss; rolling resistance; tyre
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
URN: urn:nbn:se:kth:diva-166280DOI: 10.1504/IJVD.2017.10004140ISI: 000398047100003Scopus ID: 2-s2.0-85017022330OAI: oai:DiVA.org:kth-166280DiVA, id: diva2:810284
Note

QC 20170419

Available from: 2015-05-07 Created: 2015-05-07 Last updated: 2017-05-29Bibliographically approved
In thesis
1. A tyre model for energy studies in vehicle dynamics simulations
Open this publication in new window or tab >>A tyre model for energy studies in vehicle dynamics simulations
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. p. xii, 64
Series
TRITA-AVE, ISSN 1651-7660 ; 2015:15
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-166282 (URN)978-91-7595-598-8 (ISBN)
Presentation
2015-05-22, Farkostteknik laboratoriet, Teknikringen 8, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20150507

Available from: 2015-05-07 Created: 2015-05-07 Last updated: 2015-05-07Bibliographically approved
2. Exploiting over-actuation to reduce tyre energy losses in vehicle manoeuvres
Open this publication in new window or tab >>Exploiting over-actuation to reduce tyre energy losses in vehicle manoeuvres
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Due to environmental and economic challenges road vehicles need bettersolutions to reduce energy consumption. Improvement in tyre rolling e-ciency is one of the key enablers for lower energy consumption. The shifttowards electrication and intelligent driving creates new opportunities todevelop energy-ecient vehicles. For instant over-actuated vehicles whichenables dierent objectives such as safety, performance and energy e-ciency to be fullled during a manoeuvre. The objective of this thesis is todevelop a simulation environment to simulate the energy dissipated fromthe tyre in order to investigate the potential to controlling dierent chassisparameters to reduce rolling losses during driving.The rst part of the thesis is dedicated to develop a high-delity semi-physical non-linear tyre model called the Extended Brush Tyre Model(EBM) to be used for energy studies in vehicle dynamics simulations andlater answer whether it is reasonable to believe that there is any potentialto reduce the rolling loss, and thereby energy consumption, using over-actuation.In the second part of the thesis the benets of over-actuation are invest-igated to enable rolling loss reduction. A control strategy using camber-sideslip control (CSC) is proposed. The allocation problem is solved in the formof an optimisation problem using Dynamics Programming (DP) and ModelPredictive Control (MPC). Exploiting the function for a chosen vehicle ina simulation environment shows a signicant improvement of about 60% inrolling loss reduction while maintaining path tracking. Also by using thisfunction the tyre forces can be distributed more evenly while maintainingthe global force, which results in an increase in the available tyre forcesthat is especially benecial when driving at the limit. It is revealed thatoptimising the vehicle manoeuvre from an energy perspective is sometimesin con ict with the safety demand, thus the energy and safety criteria needto be considered simultaneously during optimisation.Finally, experimental studies using an over-actuated concept vehicleconrmed that the CSC function can reduce overall energy consumptionduring low velocity manoeuvres up to about 13%. By increasing the speed,the saving potential decreases but the contribution is nonetheless of signi-cance. The developed simulation environment, including the EBM, willenable future studies of dierent solutions using over-actuation to reducerolling losses in dierent types of vehicles and driving tasks.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2017. p. 80
Series
TRITA-AVE, ISSN 1651-7660 ; 2017:35
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-207787 (URN)978-91-7729-441-2 (ISBN)
Public defence
2017-06-13, D3, Lindstedtsvägen 5, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20170524

Available from: 2017-05-24 Created: 2017-05-24 Last updated: 2017-06-29Bibliographically approved

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Davari, Mohammad MehdiJerrelind, JennyStensson Trigell, AnnikaDrugge, Lars

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