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12 results on '"Henderson, Leon"'

2. On the Control Allocation Performance of Longer Combination Vehicles

Author

Noori Asiabar, Aria, Gordon, Timothy, Gao, Yangyan, Henderson, Leon, Laine, Leo, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Orlova, Anna, editor, and Cole, David, editor

Published
2022
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3. A Model for Energy Consumption in Heavy Vehicle Braking

Author

Fyhr, Pontus, Ghandriz, Toheed, Henderson, Leon, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Orlova, Anna, editor, and Cole, David, editor

Published
2022
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4. Improved Lateral Performance of a Long Combination Vehicle Based on Artificial Flow Guidance

Author

Rahman, Shammi, Gordon, Timothy, Liu, Qingwei, Gao, Yangyan, Henderson, Leon, Laine, Leo, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Orlova, Anna, editor, and Cole, David, editor

Published
2022
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5. An Investigation of Longitudinal Tyre Force Observation for Slip Control System Development

Author

Zhu, Shenjin, Henderson, Leon, Drenth, Edo, Bruzelius, Fredrik, Jacobson, Bengt, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Klomp, Matthijs, editor, Bruzelius, Fredrik, editor, Nielsen, Jens, editor, and Hillemyr, Angela, editor

Published
2020
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9. A more efficient braking system for heavy vehicles

Author

Fyhr, Pontus and Henderson, Leon

Subjects
Control Engineering
Abstract

Electric powertrains increase efficiency in road vehicles and enable zero tailpipe emissions, but introduce practical limitations in on board energy storage capacity, due to the low energy density in battery systems when compared with chemical fuels in tanks. The increased powertrain efficiency and lower on-board energy storage levels place focus on other energy consumers in the vehicle system, such as the braking system. Our measurements indicate that a conventional pneumatic electronic braking system for heavy vehicles consumes 2-3% of the mission energy in a typical city bus cycle for a battery electric vehicle. The newly developed electromechanical braking system offers a more efficient energy conversion for the braking function, consuming 0.4-0.7% of the mission energy under similar driving conditions. This work focuses on an energy analysis of the conventional and the novel system in the context of a city bus application. The data is sourced from measurements of a battery electric bus, driven on a proving ground in tests repeated three times, in unladen condition. The measurements include comparative tests for the vehicle equipped with a traditional electro-pneumatic braking system and the same vehicle equipped with the new electro-mechanical braking system.

Published
2021

12. Full-scale testing of a novel slip control braking system for heavy vehicles.

Author

Henderson, Leon and Cebon, David

Subjects
MOTOR vehicle brakes, PNEUMATIC control, AUTOMOBILE trailers
Abstract

This paper summarises the measured emergency braking performance of a tri-axle heavy goods vehicle semitrailer fitted with a novel pneumatic slip control braking system developed by the Cambridge Vehicle Dynamics Consortium. Straight-line braking tests were carried out from 40 km/h in order to compare a commercially electro-pneumatic available anti-lock braking system and the Cambridge Vehicle Dynamics Consortium system, which has bi-stable valves coupled with a sliding-mode slip controller. On average, the Cambridge Vehicle Dynamics Consortium system reduced the stopping distance and the air use by 15% and 22% respectively compared with those for the conventional anti-lock braking system. The most significant improvements were seen on a wet basalt-tile surface (with similar friction properties to ice) where the stopping distance and the air use were improved by 17% and 30% respectively. A third performance metric, namely the mean absolute slip error, is introduced to quantify the ability of each braking system to track a wheel slip demand. Using this metric, the bi-stable valve system is shown to improve the wheel slip demand tracking by 62% compared with that of the conventional anti-lock braking system. This improvement potentially allows more accurate control of the wheel forces during extreme manoeuvres, providing scope for the future development of advanced stability control systems. [ABSTRACT FROM AUTHOR]

Published
2016
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