Mechanical impedance as coupling parameter of force and deflection perception: experimental evaluation

Authors:
Christian Hatzfeld;Roland Werthschützky
Affiliations:
Institute for Electromechanical Design, Technische Universität Darmstadt, Darmstadt, Germany;Institute for Electromechanical Design, Technische Universität Darmstadt, Darmstadt, Germany
Venue:
EuroHaptics'12 Proceedings of the 2012 international conference on Haptics: perception, devices, mobility, and communication - Volume Part I
Year:
2012

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Abstract

This paper investigates the mechanical impedance of a human subject as a potential coupling parameter between force and deflection perception. Measurements of the force perception threshold of 27 subjects at the fingertip and the mechanical impedance of 29 subject at the same location in the frequency range of 5 ... 1000 Hz were conducted. From the results, a model for the impedance was fitted and thresholds for the perception of deflections were calculated. These were compared to already published thresholds from other research groups. The results show a good fit of both data sets, therefore confirming the mechanical impedance as coupling parameter between these two dimensions of perception.