Optimal control of motorsport differentials

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dc.contributor.authorTremlett, Anthony J.
dc.contributor.authorMassaro, M.
dc.contributor.authorPurdy, David J.
dc.contributor.authorVelenis, Efstathios
dc.contributor.authorFrancis, Assadian
dc.contributor.authorMoore, A. P.
dc.contributor.authorHalley, M.
dc.date.accessioned2016-03-21T15:52:49Z
dc.date.available2016-03-21T15:52:49Z
dc.date.issued2015-10-15
dc.description.abstractModern motorsport limited slip differentials (LSD) have evolved to become highly adjustable, allowing the torque bias that they generate to be tuned in the corner entry, apex and corner exit phases of typical on-track manoeuvres. The task of finding the optimal torque bias profile under such varied vehicle conditions is complex. This paper presents a nonlinear optimal control method which is used to find the minimum time optimal torque bias profile through a lane change manoeuvre. The results are compared to traditional open and fully locked differential strategies, in addition to considering related vehicle stability and agility metrics. An investigation into how the optimal torque bias profile changes with reduced track-tyre friction is also included in the analysis. The optimal LSD profile was shown to give a performance gain over its locked differential counterpart in key areas of the manoeuvre where a quick direction change is required. The methodology proposed can be used to find both optimal passive LSD characteristics and as the basis of a semi-active LSD control algorithm.en_UK
dc.identifier.citationA.J. Tremlett, M. Massaro, D.J. Purdy, E. Velenis Assadian, A.P. Moore and M. Halley. Optimal control of motorsport differentials. Vehicle System Dynamics, 2015, Volume 53, Issue 12, pp1772-1794en_UK
dc.identifier.issn0042-3114
dc.identifier.urihttp://dx.doi.org/10.1080/00423114.2015.1093150
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/9802
dc.language.isoenen_UK
dc.publisherTaylor and Francisen_UK
dc.rightsThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/Licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Permission is granted subject to the terms of the License under which the work was published. Please check the License conditions for the work which you wish to reuse. Full and appropriate attribution must be given. This permission does not cover any third party copyrighted material which may appear in the work requested. Attribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format, Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subjectrace caren_UK
dc.subjectlimited slip differentialen_UK
dc.subjectoptimal controlen_UK
dc.subjectminimum timeen_UK
dc.titleOptimal control of motorsport differentialsen_UK
dc.typeArticleen_UK

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