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HAPTICS
2011
IEEE

On the 1/f noise and non-integer harmonic decay of the interaction of a finger sliding on flat and sinusoidal surfaces

13 years 3 months ago
On the 1/f noise and non-integer harmonic decay of the interaction of a finger sliding on flat and sinusoidal surfaces
Fluctuations of the frictional force arising from the stroke of a finger against flat and sinusoidal surfaces are studied. A custommade high-resolution friction force sensor, able to resolve millinewton forces, was used to record those fluctuations as well as the net, low-frequency components of the interaction force. Measurements show that the fluctuations of the sliding force are highly non-stationary. Despite their randomness, force spectra averages reveal regularities. With a smooth, flat, but not mirror-finish, surface the background noise follows a 1/ f trend. Recordings made with pure-tone sinusoidal gratings reveal complexities in the interaction between a finger and a surface. The fundamental frequency is driven by the periodicity of the gratings and harmonics follow a non-integer power-law decay that suggests strong nonlinearities in the fingertip interaction. The results are consistent with the existence of a multiplicity of simultaneous and rapid stick-slip relaxat...
Michael Wiertlewski, Charles Hudin, Vincent Haywar
Added 20 Aug 2011
Updated 20 Aug 2011
Type Journal
Year 2011
Where HAPTICS
Authors Michael Wiertlewski, Charles Hudin, Vincent Hayward
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