Haptic perception of force magnitude and its relation to postural arm dynamics in 3D

Title

Haptic perception of force magnitude and its relation to postural arm dynamics in 3D

 Author

van Beek, F.E. (Free University, Amsterdam)
Bergmann Tiest, WM
Mugge, W. (TU Delft Biomechatronics & Human-Machine Control; Free University, Amsterdam)
Kappers, A.M.L. (Free University, Amsterdam)

Date

2015

 Abstract

In a previous study, we found the perception of force magnitude to be anisotropic in the horizontal plane. In the current study, we investigated this anisotropy in three dimensional space. In addition, we tested our previous hypothesis that the perceptual anisotropy was directly related to anisotropies in arm dynamics. In experiment 1, static force magnitude perception was studied using a free magnitude estimation paradigm. This experiment revealed a significant and consistent anisotropy in force magnitude perception, with forces exerted perpendicular to the line between hand and shoulder being perceived as 50% larger than forces exerted along this line. In experiment 2, postural arm dynamics were measured using stochastic position perturbations exerted by a haptic device and quantified through system identification. By fitting a mass-damper-spring model to the data, the stiffness, damping and inertia parameters could be characterized in all the directions in which perception was also measured. These results show that none of the arm dynamics parameters were oriented either exactly perpendicular or parallel to the perceptual anisotropy. This means that endpoint stiffness, damping or inertia alone cannot explain the consistent anisotropy in force magnitude perception.

 To reference this document use:

http://resolver.tudelft.nl/uuid:a7b33905-3a1a-4a43-bd4d-2c53e06043b5

 DOI

https://doi.org/10.1038/srep18004

 ISSN

2045-2322

 Source

Scientific Reports, 5, 1 - 11

 Bibliographical note

W Mugge ten tijde van uitkomen artikel werknemer TU Delft (UD tenure track). Artikel heeft geen TU Delft-affiliatie. Vandaar 2 werkrelaties aangegeven en "not eligible" bij SEP output type

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2015 F.E. van Beek, WM Bergmann Tiest, W. Mugge, A.M.L. Kappers
Files
PDF srep18004.pdf 1019.9 KB
Close viewer