Mechanical Impedance as Coupling Parameter of Force and Deflection Perception: Experimental Evaluation

  • Christian Hatzfeld
  • Roland Werthschützky
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7282)


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.


force perception deflection perception mechanical impedance 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Christian Hatzfeld
    • 1
  • Roland Werthschützky
    • 1
  1. 1.Institute for Electromechanical DesignTechnische Universität DarmstadtDarmstadtGermany

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