01652nas a2200181 4500008004100000245009500041210006900136260001200205300001400217520102400231653001201255100001901267700002001286700001501306700001301321700001301334856012301347 2006 eng d00aAdvanced Modeling and preliminary psychophysical experiments for a free-hand haptic device0 aAdvanced Modeling and preliminary psychophysical experiments for cOctober a1558-15633 a

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.

10aHaptics1 aSgambelluri, N1 aScilingo, E. P.1 aBicchi, A.1 aRizzo, R1 aRaugi, M uhttp://95.110.227.16/publications/advanced-modeling-and-preliminary-psychophysical-experiments-free-hand-haptic-device01157nas a2200169 4500008004100000245013000041210006900171300001600240490000700256520052700263653001200790100001500802700001300817700001300830700001900843856012500862 2005 eng d00aAnalysis and Design of an Electromagnetic System for the Characterization of Magneto-Rheological Fluids for Haptic Interfaces0 aAnalysis and Design of an Electromagnetic System for the Charact a1876 - 18790 v413 a

In this paper the synthesis and design of a new device for the energization and characterization of Magneto-Rheological Fluids (MRF) for haptic interfaces are presented. Due to the core structure and feeding conditions, only a 3D numerical analysis provides an accurate prediction of the electromagnetic quantities and the rheological behavior of an excited specimen. The design constraints are shown in details and the results in terms of magnetic field inside the fluid and its spatial resolution are discussed.

10aHaptics1 aBicchi, A.1 aRaugi, M1 aRizzo, R1 aSgambelluri, N uhttp://95.110.227.16/publications/analysis-and-design-electromagnetic-system-characterization-magneto-rheological-fluids01494nas a2200181 4500008004100000245008800041210006900129260002600198300001200224520086500236653001201101100001901113700001301132700002001145700001301165700001501178856011901193 2004 eng d00aAnalysis and Design of a New Haptic Box Display Based on Magneto-Rheological Fluids0 aAnalysis and Design of a New Haptic Box Display Based on Magneto aMunich, GermanycJune a442-4453 a

In this paper we describe a design of an innovative immersive Haptic Black Box (HBB) based on Magneto Rheological Fluids (MRF). By exploiting results from an accurate analysis performed on a previously operating haptic display a new device capable of exciting the MRF with improved performance in terms of magnetic field intensity and spatial resolution has been developed. Due to the core structure and feeding conditions, only a 3D numerical analysis, taking into account the material non-linearity, provides an accurate prediction of the excitation field and, consequently, of the rheological behavior of the uid. The results of the present paper will be used in subsequent work where the realization of the prototype and the results of several psychophysical tests on excited MRF in terms of softness and/or shape reconstruction will be described.

10aHaptics1 aSgambelluri, N1 aRizzo, R1 aScilingo, E. P.1 aRaugi, M1 aBicchi, A. uhttp://95.110.227.16/publications/analysis-and-design-new-haptic-box-display-based-magneto-rheological-fluids.html01146nas a2200157 4500008004100000245013000041210006900171260002300240520052700263653001200790100001500802700001300817700001300830700001900843856012600862 2004 eng d00aAnalysis and Design of an Electromagnetic System for the Characterization of Magneto-Rheological Fluids for Haptic Interfaces0 aAnalysis and Design of an Electromagnetic System for the Charact aSeoul, KoreacJune3 a

In this paper the synthesis and design of a new device for the energization and characterization of Magneto-Rheological Fluids (MRF) for haptic interfaces are presented. Due to the core structure and feeding conditions, only a 3D numerical analysis provides an accurate prediction of the electromagnetic quantities and the rheological behavior of an excited specimen. The design constraints are shown in details and the results in terms of magnetic field inside the fluid and its spatial resolution are discussed.

10aHaptics1 aBicchi, A.1 aRaugi, M1 aRizzo, R1 aSgambelluri, N uhttp://95.110.227.16/publications/analysis-and-design-electromagnetic-system-characterization-magneto-rheological-fluid-0