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Manual resolution of viscosity and mass

Lee Beauregard, G; Srinivasan, MA; Durlach, NI; (1995) Manual resolution of viscosity and mass. In: (pp. pp. 657-662).

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Abstract

Psychophysical experiments measuring human resolution in manually discriminating viscosity and mass were performed while the associated force and displacement variations over time generated by the subjects were simultaneously recorded. The experiments were performed on a computer controlled electromechanical device called the Linear Grasper. For viscosity the Just Noticeable Difference (JND), a measure of human sensory resolution, was found to be 13.6% for a reference viscosity of 120 Ns/m. For mass, the JND was approximately 21% for a reference mass of 12 Kg. Motor performance data indicated that subjects applied average mean grasping forces ranging from 3.5 to 9.5 N with squeeze velocities of 35 mm/sec to 80 mm/sec in viscosity discrimination experiments and accelerations of 350 to 700 mm/sec2 in mass discrimination experiments. Analysis of the motor performance data indicated that in both discrimination experiments, the subjects' average mean applied force increased with stimulus intensity, while the average mean grasping velocity decreased with stimulus intensity in the viscosity discrimination experiments and the average mean grasping acceleration decreased with stimulus intensity in the mass discrimination experiments. This study is part of an ongoing research program to better understand human haptic perception of physical properties of objects and to provide human factors data for the improved design of haptic interfaces for virtual environments and teleoperation.

Type: Proceedings paper
Title: Manual resolution of viscosity and mass
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: http://discovery.ucl.ac.uk/id/eprint/1505353
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