Lorenz & Kopf, LLP
Methods and systems for estimating road surface friction coefficient using self aligning torque
Methods and systems for determining road surface information in a vehicle. In one embodiment, the method includes: determining at least one condition assessment value based on steering data; determining a feature set to include at least one of self-aligning torque (SAT), slip angle, SAT variance, steering rate, and lateral acceleration based on the condition assessment value; processing steering data obtained during a steering maneuver and associated with the feature set using a pattern classification technique; and determining a surface type based on the processing.
GM GLOBAL TECHNOLOGY OPERATIONS, LLC
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Qingrong Qi Sami Yingmei Valarie V. Bakhtiar B. Youssef A. David M.
Zhao Zhang Ahmed Si Boatman Litkouhi Ghoneim Sidlosky