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Davari, Mohammad MehdiORCID iD iconorcid.org/0000-0001-6339-1043
Publications (6 of 6) Show all publications
Davari, M. M., Jerrelind, J., Stensson Trigell, A. & Drugge, L. (2017). Extended Brush Tyre Model to Study Rolling Loss in Vehicle Dynamics Simulations. International Journal of Vehicle Design, 73(4), 255-280
Open this publication in new window or tab >>Extended Brush Tyre Model to Study Rolling Loss in Vehicle Dynamics Simulations
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
Keywords
EBM; extended brush tyre model; rolling loss; rolling resistance; tyre
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-166280 (URN)10.1504/IJVD.2017.10004140 (DOI)000398047100003 ()2-s2.0-85017022330 (Scopus ID)
Note

QC 20170419

Available from: 2015-05-07 Created: 2015-05-07 Last updated: 2019-08-20Bibliographically approved
Yoshimura, K., Davari, M. M., Drugge, L., Jerrelind, J. & Stensson Trigell, A. (2016). Studying Road Roughness Effect on Rolling Resistance Using Brush Tyre Model and Self-Affine Fractal Surfaces. In: The Dynamics of Vehicles on Roads and Tracks - Proceedings of the 24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015: . Paper presented at The 24th International Symposium on Dynamics of Vehicles on Roads and Tracks, 17th - 21st August 2015, Graz, Austria (pp. 273-280). CRC Press
Open this publication in new window or tab >>Studying Road Roughness Effect on Rolling Resistance Using Brush Tyre Model and Self-Affine Fractal Surfaces
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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, p. 273-280Conference 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
Keywords
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:nbn:se:kth:diva-175819 (URN)000385792300029 ()2-s2.0-84973659659 (Scopus ID)9781138028852 (ISBN)
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
Davari, M. M., Jerrelind, J., Stensson Trigell, A. & Drugge, L. (2015). A Multi-Line Brush Based Tyre Model to Study the Rolling Resistance and Energy Loss. In: Proceedings of 4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK (2015). Paper presented at 4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK.
Open this publication in new window or tab >>A Multi-Line Brush Based Tyre Model to Study the Rolling Resistance and Energy Loss
2015 (English)In: Proceedings of 4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK (2015), 2015Conference paper, Published paper (Refereed)
Abstract [en]

This study aim to develop a three dimensional multi-line brush based tyre model for investigating the rolling resistance and energy loss in tyres. The losses in the model are characterised by the external losses originated from the sliding phenomenon in the tyre contact patch, and the internal losses due to the tyre viscoelastic nature which is employed by a rubber model. The Extended Brush tyre Model (EBM) proposed in this work can be used to estimate the dissipated energy and the rolling resistance under different driving manoeuvres and wheel conditions. This paper focuses on the estimation of energy loss and in-plane rolling resistance.

National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-166211 (URN)000375226400020 ()978-1-84469-032-9 (ISBN)
Conference
4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK
Note

QC 20150507

Available from: 2015-05-05 Created: 2015-05-05 Last updated: 2017-05-29Bibliographically approved
Davari, M. M. (2015). A tyre model for energy studies in vehicle dynamics simulations. (Licentiate dissertation). Stockholm: KTH Royal Institute of Technology
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
Davari, M. M., Jerrelind, J., Stensson Trigell, A. & Edrén, J. (2014). Investigating the Potential of Wheel Corner Modules in Reducing Rolling Resistance of Tyres. In: Proceedings of FISITA "14 World Automotive Congress, Maastricht, Netherlands (2014): . Paper presented at FISITA ’14 World Automotive Congress, Maastricht, Netherlands, 2–6 June 2014.
Open this publication in new window or tab >>Investigating the Potential of Wheel Corner Modules in Reducing Rolling Resistance of Tyres
2014 (English)In: Proceedings of FISITA "14 World Automotive Congress, Maastricht, Netherlands (2014), 2014Conference paper, Published paper (Refereed)
Abstract [en]

The improvement in tire rolling efficiency is one of the key elements to optimize the fuel economy and thereby reduce the vehicle emissions. Earlier efforts to reduce the rolling resistance have mainly been focusing on new materials in the tire compounds. The overall research aim of this study is to present the potentials ofimplementing innovative chassis concepts with the focus on Wheel Corner Modules (WCM) by describing thepossibilities in affecting rolling resistance and relating them to previous research findings. The core idea of theconcept is to actively control and actuate all degrees of freedom in the wheel i.e. implementing steering,suspension and propulsion functions into a unique module which can be implemented in each corner of the vehicle. Using this concept the limitations of traditional wheel kinematics can be resolved extensively. This article presents the first step towards creating a vehicle simulation model that can show how the WCM functionality can influence the rolling resistance. A model of loss is chosen after analysing the behaviour of three different rubber models and then implemented into a brush tire model. An effective way, but less complicatedcompared to current methods, to introduce the loss into tire model is presented. In conventional suspensions, thedesign is compromising between for example safety, comfort and rolling resistance, etc. at all drivingconditions. However, using the WCM, the possibility of achieving a better compromise between those objectivesis possible. Finally, based on WCM functionalities a plausible control architecture is proposed.

National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-166208 (URN)
Conference
FISITA ’14 World Automotive Congress, Maastricht, Netherlands, 2–6 June 2014
Note

QC 20150507

Available from: 2015-05-05 Created: 2015-05-05 Last updated: 2017-05-29Bibliographically approved
Jerrelind, J., Edrén, J., Li, S., Davari, M. M., Drugge, L. & Stensson Trigell, A. (2013). Exploring active camber to enhance vehicle performance and safety. In: : . Paper presented at 23rd International Symposium on Dynamics of Vehicles on Roads and Tracks, 19th-23rd of August 2013, Qingdao, China.
Open this publication in new window or tab >>Exploring active camber to enhance vehicle performance and safety
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2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The aim of this study is to evaluate optimal active camber strategies for improvement of vehicle performance and safety during limit handling. Numerical optimisation is used to find solutions on how the active camber should be controlled and coordinated in cooperation with individual braking and front axle steering. Based on the characteristics of a multi-line brush tyre model, a Simple Magic Formula description is developed where camber dependency, load sensitivity and first order speed dependent relaxation dynamics are included. The vehicle is analysed during an evasive manoeuvre when the vehicle is running at the limit. It is evident from the results that active camber control can improve safety and performance during an avoidance manoeuvre.

National Category
Vehicle Engineering
Research subject
SRA - Transport
Identifiers
urn:nbn:se:kth:diva-138555 (URN)
Conference
23rd International Symposium on Dynamics of Vehicles on Roads and Tracks, 19th-23rd of August 2013, Qingdao, China
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note

QC 20140204

Available from: 2013-12-19 Created: 2013-12-19 Last updated: 2015-05-07Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0001-6339-1043

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