Full-scale testing of a novel slip control braking system for heavy vehicles
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
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Henderson, L., & Cebon, D. (2015). Full-scale testing of a novel slip control braking system for heavy vehicles. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering https://doi.org/10.1177/0954407015604804
This paper summarises the measured emergency braking performance of a tri-axle heavy goods vehicle (HGV) semitrailer fitted with a novel pneumatic slip-control braking system developed by the Cambridge Vehicle Dynamics Consortium (CVDC). Straight-line braking tests were carried out from 40km/h in order to compare a commercially available electro-pneumatic HGV trailer ABS system and the CVDC system, which has bi-stable valves coupled with a sliding mode slip controller. On average, the CVDC system reduced stopping distance and air use by 15% and 22% respectively compared to conventional ABS. The most significant improvements were seen on a wet basalt tile surface (with similar friction properties to ice) where stopping distance and air use were improved by 17% and 30% respectively. A third performance metric, mean absolute slip error (MSE), is introduced to quantify each braking system’s ability to track a wheel slip demand. Using this metric, the bistable valve system is shown to improve wheel slip demand tracking by 62% compared to conventional ABS. This improvement potentially allows more accurate control of wheel forces during extreme manoeuvres, providing scope for the future development of advanced stability control systems.
Anti-lock braking system, ABS, slip control, heavy vehicle, straight-line braking, brake system design, vehicle testing, pneumatic actuator, electro-pneumatic
This work was supported by Haldex Brake Products Ltd, the New Zealand Tertiary Education Commission and the Cambridge Vehicle Dynamics Consortium (CVDC).
External DOI: https://doi.org/10.1177/0954407015604804
This record's URL: https://www.repository.cam.ac.uk/handle/1810/249268