Advanced modelling and preliminary psychophysical experiments for a free-hand haptic device

In this paper we report on a new improved free-hand haptic interface based on magnetorheological fluids (MRFs). MRFs are smart materials which change their rheology according to an external magnetic field. The new architecture here proposed results from the development and improvement of earlier prototypes. The innovative idea behind this device is to allow subjects interacting directly with an object, whose rheology is rapidly and easily changeable, freely moving their hands without rigid mechanical linkages. Numerical advanced simulation tests using algorithms based on finite element methods have been implemented, in order to analyze and predict the spatial distribution of the magnetic field. A special focus was laid on investigating on how the magnetic filed profile is altered by the introduction of the hand. Possible solutions were proposed to overcome this perturbation. Finally some preliminary psychophysical tests in order to assess the performance of the device are reported and discussed

[1]  Shirley J. Dyke,et al.  PHENOMENOLOGICAL MODEL FOR MAGNETORHEOLOGICAL DAMPERS , 1997 .

[2]  S. Lederman,et al.  TACTUAL PERCEPTION , 2003 .

[3]  G. Bossis,et al.  Yield stresses in magnetic suspensions , 1991 .

[4]  W. Kordonsky,et al.  Elements and Devices Based on Magnetorheological Effect* , 1993 .

[5]  J. D. Carlson,et al.  COMMERCIAL MAGNETO-RHEOLOGICAL FLUID DEVICES , 1996 .

[6]  Antonio Bicchi,et al.  Towards a Haptic Black Box for free-hand softness and shape exploration , 2003, 2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422).

[7]  A. Bicchi,et al.  Analysis and design of an electromagnetic system for the characterization of magneto-rheological fluids for haptic interfaces , 2005, IEEE Transactions on Magnetics.

[8]  Jianming Jin.  Electromagnetics in magnetic resonance imaging , 1998 .

[9]  R. S. Johansson,et al.  Roles of glabrous skin receptors and sensorimotor memory in automatic control of precision grip when lifting rougher or more slippery objects , 2004, Experimental Brain Research.

[10]  Antonio Bicchi,et al.  Haptic displays based on magnetorheological fluids: design, realization and psychophysical validation , 2003, 11th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2003. HAPTICS 2003. Proceedings..

[11]  Shirley J. Dyke,et al.  Phenomenological Model of a Magnetorheological Damper , 1996 .

[12]  Antonio Bicchi,et al.  Haptic interfaces based on magnetorheological fluids , 2002 .

[13]  D. De Rossi,et al.  A magnetorheological fluid as a haptic display to replicate perceived biological tissues compliance , 2000, 1st Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology. Proceedings (Cat. No.00EX451).