Papageorgiou, GeorgiosBarden, JasonWhidborne, James F.Garry, Kevin P.2019-04-162019-04-162018-11-01Georgios Papageorgiou, Jason Barden, James F. Whidborne and Kevin P. Garry. Extremum seeking control for truck drag reduction. Proceedings of the 2018 UKACC 12th International Conference on Control (CONTROL 2018), 5-7 September, Sheffield9781538628645https://doi.org/10.1109/CONTROL.2018.8516808https://dspace.lib.cranfield.ac.uk/handle/1826/14088The aerodynamic drag on a heavy truck tractor and semi-trailer combination can be reduced by means of a wind deflector installed on the roof of the tractor cab. The drag reduction is dependent upon the height and shape of the deflector. A variable height deflector has been constructed and tested in a wind-tunnel and on-road. In this paper, an extremum-seeking control scheme is proposed to adjust on-line the deflector height to minimize the aerodynamic drag. The effectiveness of the scheme is evaluated by simulation and its practicality is evaluated.enAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/Conference paper