Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Studying Road Roughness Effect on Rolling Resistance Using Brush Tyre Model and Self-Affine Fractal Surfaces
(Department of Mechanical Engineering, University of Tokyo)
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. (Department of Mechanical Engineering, University of Tokyo)ORCID iD: 0000-0001-6339-1043
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0001-8928-0368
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-1426-1936
Show others and affiliations
2016 (English)In: The Dynamics of Vehicles on Roads and Tracks - Proceedings of the 24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015, CRC Press, 2016, 273-280 p.Conference paper, Published paper (Refereed)
Abstract [en]

While there are many tyre and vehicle dependent factors that affect the rollingresistance, the road properties play also an influential role in the overall resistance on the vehicle.The aim of this study is to develop amodel that can estimate the effect of road roughness on rollingresistance of tyres where both the texture-dependent and independent factors are contributing tooverall rolling resistance. In this paper, a method based on the self-affine fractal surfaces is usedto model realistic road characteristics in order to couple it with a brush based tyre model to beable to study the influence of road roughness on tyre rolling resistance. The simulation resultssuggest that the rolling resistance increases with increased RMS-value and both the macro- andthe micro-texture have an influence on the rolling resistance while the macro-texture effect is moreinfluential. The results of this paper can be related to the estimation of fuel economy on differentroad textures, from macro-texture to micro-texture and further optimisation of road surfaces.

Place, publisher, year, edition, pages
CRC Press, 2016. 273-280 p.
Keyword [en]
Fractals, Fuel economy, Laminates, Roads and streets, Rolling resistance, Surface roughness, System theory, Tires, Vehicles, Dependent factors, Micro texture, Optimisations, Resistance increase, Road roughness, Road surfaces, Road textures, Self-affine fractal surfaces
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering; Transport Science
Identifiers
URN: urn:nbn:se:kth:diva-175819ISI: 000385792300029Scopus ID: 2-s2.0-84973659659ISBN: 9781138028852 (print)OAI: oai:DiVA.org:kth-175819DiVA: diva2:862530
Conference
The 24th International Symposium on Dynamics of Vehicles on Roads and Tracks, 17th - 21st August 2015, Graz, Austria
Funder
VINNOVATrenOp, Transport Research Environment with Novel Perspectives
Note

QC 20161121

Available from: 2015-10-22 Created: 2015-10-22 Last updated: 2017-05-29Bibliographically approved
In thesis
1. 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. 80 p.
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

Open Access in DiVA

No full text

Other links

ScopusConference website

Authority records BETA

Davari, Mohammad MehdiDrugge, LarsJerrelind, JennyStensson Trigell, Annika

Search in DiVA

By author/editor
Davari, Mohammad MehdiDrugge, LarsJerrelind, JennyStensson Trigell, Annika
By organisation
Vehicle DynamicsVinnExcellence Center for ECO2 Vehicle design
Vehicle Engineering

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 270 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf