Afzal et al., Lateral displacement threshold for friction sensing, IEEE Haptics Symposium 2022
Channel: IEEE Haptics Symposium
Date: 2022-03-15

N. Afzal, E. Stubbs, H. Khamis, A. J. Loutit, S. J. Redmond, R. M. Vickery, M. Wiertlewski, I. Birznieks, Submillimeter lateral displacement enables friction sensing and awareness of surface slipperiness, Proceedings of IEEE Haptics Symposium 2022 
Human tactile perception and motor control rely on frictional estimates that stem from the deformation of skin and slip events. This study aims to quantify how minor lateral displacement and speed enable frictional difference perception. A combination of four displacement magnitudes (0.2, 0.5, 1.2, and 2mm), two friction levels (high, low), and three displacement speeds (1, 5, and 10mm/s) were tested. We found that frictional difference perception was enabled by submillimeter range lateral displacement. Friction discrimination thresholds were reached with lateral displacements ranging from 0.2-0.5mm and speed had only a marginal effect. These results demonstrate that partial slips are sufficient to cause awareness of surface slipperiness.
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