Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 39) Show all publications
Edrén, J., Jonasson, M., Jerrelind, J., Stensson Trigell, A. & Drugge, L. (2019). Energy efficient cornering using over-actuation. Mechatronics (Oxford), 59, 69-81
Open this publication in new window or tab >>Energy efficient cornering using over-actuation
Show others...
2019 (English)In: Mechatronics (Oxford), ISSN 0957-4158, E-ISSN 1873-4006, Vol. 59, p. 69-81Article in journal (Refereed) Published
Abstract [en]

This work deals with utilisation of active steering and propulsion on individual wheels in order to improve a vehicle's energy efficiency during a double lane change manoeuvre at moderate speeds. Through numerical optimisation, solutions have been found for how wheel steering angles and propulsion torques should be used in order to minimise the energy consumed by the vehicle travelling through the manoeuvre. The results show that, for the studied vehicle, the energy consumption due to cornering resistance can be reduced by approximately 10% compared to a standard vehicle configuration. Based on the optimisation study, simplified algorithms to control wheel steering angles and propulsion torques that results in more energy efficient cornering are proposed. These algorithms are evaluated in a simulation study that includes a path tracking driver model. Based on a combined rear axle steering and torque vectoring control an improvement of 6–8% of the energy consumption due to cornering was found. The results indicate that in order to improve energy efficiency for a vehicle driving in a non-safety-critical cornering situation the force distribution should be shifted towards the front wheels.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Energy efficiency, Optimisation, Over-actuation, Vehicle control, Automobile steering equipment, Control system synthesis, Energy utilization, Optimization, Propulsion, Safety engineering, Steering, Vehicle wheels, Double lane changes, Force distributions, Optimisations, Simplified algorithms, Vehicle configuration, Wheel steering angle
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-252459 (URN)10.1016/j.mechatronics.2019.02.006 (DOI)000468255500007 ()2-s2.0-85062904711 (Scopus ID)
Note

QC 20190715

Available from: 2019-07-15 Created: 2019-07-15 Last updated: 2019-07-15Bibliographically approved
Sun, P., Stensson Trigell, A., Drugge, L., Jerrelind, J. & Jonasson, M. (2018). Analysis of camber control and torque vectoring to improve vehicle energy efficiency. In: The Dynamics of Vehicles on Roads and Tracks: . Paper presented at 25th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2017, 14 August 2017 through 18 August 2017 (pp. 121-128). CRC Press/Balkema
Open this publication in new window or tab >>Analysis of camber control and torque vectoring to improve vehicle energy efficiency
Show others...
2018 (English)In: The Dynamics of Vehicles on Roads and Tracks, CRC Press/Balkema , 2018, p. 121-128Conference paper, Published paper (Refereed)
Abstract [en]

This paper focuses on the use of camber control and torque vectoring in order to make future vehicles more energy efficient and thereby more environmentally friendly. The energy loss during steady state cornering including rolling resistance loss, aerodynamic loss, longitudinal slip loss and lateral slip loss, is formulated and studied. Camber control, torque vectoring control and a combination of both are compared. From the simulation results, it can be concluded that during steady state cornering, torque vectoring has a very small contribution to energy reduction while camber control can make a significant contribution to energy saving. By combining torque vectoring and camber control during steady state cornering, in theory up to 14% energy saving are found for certain cases.

Place, publisher, year, edition, pages
CRC Press/Balkema, 2018
Keywords
Camber control, Energy saving, Steady state cornering, Torque vectoring, Cambers, Energy conservation, Energy dissipation, Torque, Aerodynamic loss, Energy efficient, Energy reduction, Steady state, Energy efficiency
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-247414 (URN)000469105100019 ()2-s2.0-85061316493 (Scopus ID)9781138035713 (ISBN)
Conference
25th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2017, 14 August 2017 through 18 August 2017
Note

QC20190502

Available from: 2019-05-02 Created: 2019-05-02 Last updated: 2019-06-14Bibliographically approved
Sun, P., Stensson Trigell, A., Drugge, L., Jerrelind, J. & Jonasson, M. (2018). Analysis of camber control and torque vectoring to improve vehicle energy efficiency. In: Spiryagin, M Gordon, T Cole, C McSweeney, T (Ed.), DYNAMICS OF VEHICLES ON ROADS AND TRACKS, VOL 1: . Paper presented at 5th International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD 2017), 14-18 August 2017, Rockhampton, Queensland, Australia (pp. 121-128). CRC PRESS-TAYLOR & FRANCIS GROUP
Open this publication in new window or tab >>Analysis of camber control and torque vectoring to improve vehicle energy efficiency
Show others...
2018 (English)In: DYNAMICS OF VEHICLES ON ROADS AND TRACKS, VOL 1 / [ed] Spiryagin, M Gordon, T Cole, C McSweeney, T, CRC PRESS-TAYLOR & FRANCIS GROUP , 2018, p. 121-128Conference paper, Published paper (Refereed)
Abstract [en]

This paper focuses on the use of camber control and torque vectoring in order to make future vehicles more energy efficient and thereby more environmentally friendly. The energy loss during steady state cornering including rolling resistance loss, aerodynamic loss, longitudinal slip loss and lateral slip loss, is formulated and studied. Camber control, torque vectoring control and a combination of both are compared. From the simulation results, it can be concluded that during steady state cornering, torque vectoring has a very small contribution to energy reduction while camber control can make a significant contribution to energy saving. By combining torque vectoring and camber control during steady state cornering, in theory up to 14% energy saving are found for certain cases.

Place, publisher, year, edition, pages
CRC PRESS-TAYLOR & FRANCIS GROUP, 2018
Keywords
Camber control, torque vectoring, energy saving, steady state cornering
National Category
Energy Systems
Identifiers
urn:nbn:se:kth:diva-253195 (URN)10.1201/9781351057264 (DOI)000469105100019 ()
Conference
5th International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD 2017), 14-18 August 2017, Rockhampton, Queensland, Australia
Note

QC 20190614

Available from: 2019-06-14 Created: 2019-06-14 Last updated: 2019-06-14Bibliographically approved
Sun, P., Stensson Trigell, A., Drugge, L., Jerrelind, J. & Jonasson, M. (2018). Exploring the potential of camber control to improve vehicles' energy efficiency during cornering. Energies, 11(4), Article ID 724.
Open this publication in new window or tab >>Exploring the potential of camber control to improve vehicles' energy efficiency during cornering
Show others...
2018 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 11, no 4, article id 724Article in journal (Refereed) Published
Abstract [en]

Actively controlling the camber angle to improve energy efficiency has recently gained interest due to the importance of reducing energy consumption and the driveline electrification trend that makes cost-efficient implementation of actuators possible. To analyse how much energy that can be saved with camber control, the effect of changing the camber angles on the forces and moments of the tyre under different driving conditions should be considered. In this paper, Magic Formula tyre models for combined slip and camber are used for simulation of energy analysis. The components of power loss during cornering are formulated and used to explain the influence that camber angles have on the power loss. For the studied driving paths and the assumed driver model, the simulation results show that active camber control can have considerable influence on power loss during cornering. Different combinations of camber angles are simulated, and a camber control algorithm is proposed and verified in simulation. The results show that the camber controller has very promising application prospects for energy-efficient cornering.

Place, publisher, year, edition, pages
MDPI AG, 2018
Keywords
Camber, Cornering, Energy saving, Magic formula
National Category
Energy Systems
Identifiers
urn:nbn:se:kth:diva-227632 (URN)10.3390/en11040724 (DOI)000434703400035 ()2-s2.0-85044506343 (Scopus ID)
Note

QC 20180515

Available from: 2018-05-15 Created: 2018-05-15 Last updated: 2018-07-02Bibliographically approved
Davari, M. M., Jerrelind, J. & Stensson Trigell, A. (2017). Energy Efficiency Analyses of a Vehicle in Modal and Transient Driving Cycles including Longitudinal and Vertical Dynamics. Transportation Research Part D: Transport and Environment, 53, 263-275
Open this publication in new window or tab >>Energy Efficiency Analyses of a Vehicle in Modal and Transient Driving Cycles including Longitudinal and Vertical Dynamics
2017 (English)In: Transportation Research Part D: Transport and Environment, ISSN 1361-9209, E-ISSN 1879-2340, Vol. 53, p. 263-275Article in journal (Refereed) Published
Abstract [en]

The growing concerns about the environmental issues caused by vehicles and a strive forbetter fuel economy, urge the legislators to introduce conservative regulations on vehicletesting and homologation procedures. To have accurate evaluations, driving cycles thatcan sufficiently describe the vehicles’ conditions experienced during driving is a prerequisite.In current driving cycles there are still some issues which are disregarded. The aim ofthe presented work is to study the contribution of chassis and vehicle dynamics settings ontyre rolling loss in comparison with the original assumptions made in the NEDC, FTP andHWFET driving cycles. A half-car model including a semi-physical explicit tyre model tosimulate the rolling loss is proposed. For the chosen vehicle and tyre characteristics,depending on the specific chassis settings and considered driving cycle, considerable differenceup to 7% was observed between the energy consumption of the proposed- and conventionalapproach. The current work aims to provide the legislators with a betterinsight into the real effects of chassis and vehicle dynamics during the certification processto further improve the test related procedures required for homologation such as generationof road load curves. I.e., the aim is not to provide a new homologation process, sincethere are also other effects such as road roughness and tyre temperature that need to beconsidered. The results are also of interest for the vehicle manufacturers for further considerationsduring test preparation as well as in the development phase in order to reduce theenvironmental impacts.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Driving cycle, Rolling loss, Tyre, Wheel alignments, Environmental impact, Homologation
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-207786 (URN)10.1016/j.trd.2017.04.019 (DOI)2-s2.0-85018360882 (Scopus ID)
Note

QC 20170529

Available from: 2017-05-23 Created: 2017-05-23 Last updated: 2017-05-29Bibliographically approved
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
Favre, T., Näfver, J. J., Jerrelind, J., Stensson Trigell, A. & Efraimsson, G. (2016). Static coupling between detached-eddy simulations and vehicle dynamic simulations of a generic road vehicle model with different rear configurations in unsteady crosswind. International Journal of Vehicle Design, 72(4), 332-353
Open this publication in new window or tab >>Static coupling between detached-eddy simulations and vehicle dynamic simulations of a generic road vehicle model with different rear configurations in unsteady crosswind
Show others...
2016 (English)In: International Journal of Vehicle Design, ISSN 0143-3369, E-ISSN 1741-5314, Vol. 72, no 4, p. 332-353Article in journal (Refereed) Published
Abstract [en]

In this paper, aerodynamic loads of a generic car model obtained from advanced computational fluid dynamics (CFD) simulations are coupled to a vehicle dynamics model to enable the assessment of the on-road response. The influence of four rear configurations is studied. The different configurations yield large differences in yaw moments and side forces, which in turn result in considerable discrepancies in lateral displacements as well as yaw rates. From the simulations, it is seen that through balancing the location of the centre of pressure, the stiffness of the suspension bushings and the cornering stiffness of the tyres, it is possible to obtain stable vehicles in strong crosswind conditions for all four rear designs. The results show that monitoring the location of the aerodynamic centre of pressure with respect to the centre of gravity and the neutral steer point is essential for the possibility of designing stable vehicles in transient crosswind.

Place, publisher, year, edition, pages
INDERSCIENCE ENTERPRISES LTD, 2016
Keywords
unsteady crosswind aerodynamics, wind gust models, DES, detached-eddy simulations, vehicle dynamics simulation.
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-206326 (URN)10.1504/IJVD.2016.082384 (DOI)000397192200003 ()2-s2.0-85013994354 (Scopus ID)
Note

QC 20170505

Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2017-05-05Bibliographically 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
Show others...
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
Edrén, J., Jonasson, M., Jerrelind, J., Trigell, A. S. & Drugge, L. (2015). Utilisation of optimisation solutions to control active suspension for decreased braking distance. Vehicle System Dynamics, 53(2), 256-273
Open this publication in new window or tab >>Utilisation of optimisation solutions to control active suspension for decreased braking distance
Show others...
2015 (English)In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159, Vol. 53, no 2, p. 256-273Article in journal (Refereed) Published
Abstract [en]

This work deals with how to utilise active suspension on individual vehicle wheels in order to improve the vehicle performance during straight-line braking. Through numerical optimisation, solutions have been found as regards how active suspension should be controlled and coordinated with friction brakes to shorten the braking distance. The results show that, for the studied vehicle, the braking distance can be shortened by more than 1 m when braking from 100 km/h. The applicability of these results is studied by investigating the approach for different vehicle speeds and actuator stroke limitations. It is shown that substantial improvements in the braking distance can also be found for lower velocities, and that the actuator strokes are an important parameter. To investigate the potential of implementing these findings in a real vehicle, a validated detailed vehicle model equipped with active struts is analysed. Simplified control laws, appropriate for on-board implementation and based on knowledge of the optimised solution, are proposed and evaluated. The results show that substantial improvements of the braking ability, and thus safety, can be made using this simplified approach. Particle model simulations have been made to explain the underlying physical mechanisms and limitations of the approach. These results provide valuable guidance on how active suspension can be used to achieve significant improvements in vehicle performance with reasonable complexity and energy consumption.

Keywords
actuator, active suspension, optimisation, integrated chassis control, vehicle control
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-161624 (URN)10.1080/00423114.2014.992443 (DOI)000349523400008 ()2-s2.0-84923465697 (Scopus ID)
Note

QC 20150324

Available from: 2015-03-24 Created: 2015-03-13 Last updated: 2017-12-04Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1426-1936

Search in DiVA

Show all publications