Advanced emergency braking under split friction conditions and the influence of a destabilising steering wheel torque
Vehicle System Dynamics
Taylor & Francis
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Tagesson, K., & Cole, D. (2017). Advanced emergency braking under split friction conditions and the influence of a destabilising steering wheel torque. Vehicle System Dynamics https://doi.org/10.1080/00423114.2017.1278779
The steering system in most heavy trucks is such that it causes a destabilising steering wheel torque when braking on split friction, that is, different friction levels on the two sides of the vehicle. Moreover, advanced emergency braking systems are now mandatory in most heavy trucks, making vehicle-induced split friction braking possible. This imposes higher demands on understanding how the destabilising steering wheel torque affects the driver, which is the focus here. Firstly, an experiment has been carried out involving 24 subjects all driving a truck where automatic split friction braking was emulated. Secondly, an existing driver–vehicle model has been adapted and implemented to improve understanding of the observed outcome. A common conclusion drawn, after analysing results, is that the destabilising steering wheel torque only has a small effect on the motion of the vehicle. The underlying reason is a relatively slow ramp up of the disturbance in comparison to the observed cognitive delay amongst subjects; also the magnitude is low and initially suppressed by passive driver properties.
heavy vehicles, braking, steering, steering torque, driver model, neuromuscular
The authors would like to thank Chalmers Area of Advance Transport for financing an exchange that enabled this cooperation.
External DOI: https://doi.org/10.1080/00423114.2017.1278779
This record's URL: https://www.repository.cam.ac.uk/handle/1810/263114