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A Multi-Line Brush Based Tyre Model to Study the Rolling Resistance and Energy Loss
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Fordonsdynamik. KTH, Skolan för teknikvetenskap (SCI), Centra, VinnExcellence Center for ECO2 Vehicle design.ORCID-id: 0000-0001-6339-1043
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Fordonsdynamik.ORCID-id: 0000-0002-1426-1936
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Fordonsdynamik.ORCID-id: 0000-0002-4048-3452
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Fordonsdynamik.ORCID-id: 0000-0001-8928-0368
2015 (engelsk)Inngår i: Proceedings of 4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK (2015), 2015Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
2015.
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-166211ISI: 000375226400020ISBN: 978-1-84469-032-9 (tryckt)OAI: oai:DiVA.org:kth-166211DiVA, id: diva2:809766
Konferanse
4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK
Merknad

QC 20150507

Tilgjengelig fra: 2015-05-05 Laget: 2015-05-05 Sist oppdatert: 2017-05-29bibliografisk kontrollert
Inngår i avhandling
1. A tyre model for energy studies in vehicle dynamics simulations
Åpne denne publikasjonen i ny fane eller vindu >>A tyre model for energy studies in vehicle dynamics simulations
2015 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2015. s. xii, 64
Serie
TRITA-AVE, ISSN 1651-7660 ; 2015:15
HSV kategori
Identifikatorer
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 (engelsk)
Opponent
Veileder
Merknad

QC 20150507

Tilgjengelig fra: 2015-05-07 Laget: 2015-05-07 Sist oppdatert: 2015-05-07bibliografisk kontrollert
2. Exploiting over-actuation to reduce tyre energy losses in vehicle manoeuvres
Åpne denne publikasjonen i ny fane eller vindu >>Exploiting over-actuation to reduce tyre energy losses in vehicle manoeuvres
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
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.

sted, utgiver, år, opplag, sider
KTH Royal Institute of Technology, 2017. s. 80
Serie
TRITA-AVE, ISSN 1651-7660 ; 2017:35
HSV kategori
Forskningsprogram
Farkostteknik
Identifikatorer
urn:nbn:se:kth:diva-207787 (URN)978-91-7729-441-2 (ISBN)
Disputas
2017-06-13, D3, Lindstedtsvägen 5, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad

QC 20170524

Tilgjengelig fra: 2017-05-24 Laget: 2017-05-24 Sist oppdatert: 2017-06-29bibliografisk kontrollert

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