DocumentCode :
2128739
Title :
On the 1/f noise and non-integer harmonic decay of the interaction of a finger sliding on flat and sinusoidal surfaces
Author :
Wiertlewski, Michaël ; Hudin, Charles ; Hayward, Vincent
Author_Institution :
Sensory & Ambient Interfaces Lab., CEA, Fontenay-Aux-Roses, France
fYear :
2011
fDate :
21-24 June 2011
Firstpage :
25
Lastpage :
30
Abstract :
Fluctuations of the frictional force arising from the stroke of a finger against flat and sinusoidal surfaces are studied. A custom-made high-resolution friction force sensor, able to resolve milli-newton 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 relaxation oscillations. Results have implications for high fidelity haptic rendering and biotribology.
Keywords :
force measurement; force sensors; haptic interfaces; interactive systems; rendering (computer graphics); tribology; 1/f noise; finger sliding interaction; fingertip interaction; flat surfaces; force sensor; force spectra; frictional force; fundamental frequency; haptic biotribology; haptic rendering; interaction force; low frequency components; milli newton forces; non integer harmonic decay; power law decay; pure tone sinusoidal gratings; sinusoidal surfaces; stick-slip relaxation oscillations; Force; Force measurement; Frequency measurement; Friction; Gratings; Harmonic analysis; Skin;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
World Haptics Conference (WHC), 2011 IEEE
Conference_Location :
Istanbul
Print_ISBN :
978-1-4577-0299-0
Electronic_ISBN :
978-1-4577-0297-6
Type :
conf
DOI :
10.1109/WHC.2011.5945456
Filename :
5945456
Link To Document :
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