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From the October-December 2013 issue

The Physical Basis of Perceived Roughness in Virtual Sinusoidal Textures

By Bertram Unger, Roberta Klatzky, and Ralph Hollis

Free Featured ArticleUsing a high-fidelity haptic interface based on magnetic levitation, subjects explored virtual sinusoidal textures with a frictionless probe and reported the subjective magnitude of perceived roughness. A psychophysical function was obtained spanning 33 levels of spatial periods from 0.025 to 6.00 mm. Kinematic and dynamic variables were recorded at 1,000 Hz and used to derive a set of variables to correlate with the psychophysical outcome. These included position, velocity, kinetic energy, instantaneous force (based on acceleration), mean force, and variability of the $z$ -axis force signal from the power spectral density. The analysis implicates power of the force signal as the physical correlate of perceived roughness of sinusoidal textures. The relationship between power and roughness held across the range of spatial periods examined.

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ToH is a joint publication of the IEEE Computer Society, IEEE Robotics and Automation Society and the IEEE Consumer Electronics Society.

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IEEE Transactions on Haptics (ToH) is a quarterly journal that publishes archival research results related to the science, technology and applications associated with information acquisition and object manipulation through touch.
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