Tactile display using shape memory alloy micro-coil actuator and magnetic latch mechanism

Matsunaga, Tadao; Totsu, Kentaro; Esashi, Masayoshi; Haga, Yoichi

doi:10.1016/j.displa.2013.03.001

Cited by 44 publications

(19 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…devices have already included active blocking of taxel states [6,17]. In our case, if a latching system were included, and assuming 50 ms of switching actuation for 1.25 seconds of refresh rate, the average power consumption would be reduced to 43 W for a matrix of 25x25 taxels.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Using Pot-Magnets to Enable Stable and Scalable Electromagnetic Tactile Displays

Zárate

Shea

2017

IEEE Trans. Haptics

View full text Add to dashboard Cite

Abstract-We present the design, fabrication, characterization and psychophysical testing of a scalable haptic display based on electromagnetic (EM) actuators. The display consists of a 4x4 array of taxels, each of which can be in a raised or a lowered position, thus generating different static configurations. One of the most challenging aspects when designing densely-packed arrays of EM actuators is obtaining large actuation forces while simultaneously generating only weak interactions between neighboring taxels. In this work we introduce a lightweight and effective magnetic shielding architecture. The moving part of each taxel is a cylindrical permanent magnet embedded in a ferromagnetic pot, forming a pot-magnet. An array of planar microcoils attracts or repels each pot-magnet. This configuration reduces the interaction between neighboring magnets by more than one order of magnitude, while the coil/magnet interaction is only reduced by 10%. For 4 mm diameter pins on an 8 mm pitch, we obtained displacements of 0.55 mm and forces of 40 mN using 1.7 W. We measured the accuracy of human perception under two actuation configurations which differed in the force vs. displacement curve. We obtained 91% of correct answers in pulling configuration and 100% in pushing configuration.

show abstract

Section: Discussion and Outlookmentioning

confidence: 99%

Using Pot-Magnets to Enable Stable and Scalable Electromagnetic Tactile Displays

Zárate

Shea

2017

IEEE Trans. Haptics

View full text Add to dashboard Cite

show abstract

“…The deformation of the martensite phase is usually achieved by the application of an external load able to promote the re-orientation of martensite variants (de-twinning); during detwinning, the high mobility of the martensite variant interfaces minimises the strain energy and allows for high deformation. The shape recovery obtained after heating de-twinned martensite is normally used to promote mechanical work, and it finds several interesting applications in the field of actuation [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Functional properties and morphology of NiTi articulated actuation elements during thermo-mechanical cyclic tests

2015

View full text Add to dashboard Cite

Shape memory alloys (SMAs) are active materials able to recover large strains over several thermo-mechanical cycles. In the actuation field, this strain recovery is principally exploited on the mini and micro scales at which SMAs exhibit their highest power density with respect to common lightweight technologies. During the repetitive actuation of a SMA element, certain events occur: strain drift at the beginning of cyclic testing, the accumulation of plastic deformation, and strain stabilisation. In this study, these events as well as the overall mechanical response of an articulated NiTi element were monitored through calorimetry and scanning electron microscopy. Fatigue and cyclic stability were tested under different loads and under different aging conditions. In addition, the surface morphology was continuously observed via scanning electron microscopy to monitor crack growth and propagation during the fatigue test. Finally, before and after the fatigue test, samples were tested through calorimetry to investigate the overall microstructural homogeneity. Results confirm the high potential of the proposed geometry for the development of NiTi non-conventional active elements in the miniature actuation field.

show abstract

“…Digital actuators can also be used as array to perform more complex tasks by combing several elementary actions. The common applications of actuators arrays are optical switch arrays [13], tactile displays [14], digital robots [15] and displacement tables [16], [17].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a conveyance device based on a digital actuators array and a structured plate

Petit

Dupont

et al. 2016

2016 11th France-Japan &Amp; 9th Europe-Asia Congress on Mechatronics (MECATRONICS) /17th International Conference on Research

View full text Add to dashboard Cite

This paper presents a conveyance device based on a digital actuators array and a structured plate. The actuators array is composed of four electromagnetic digital actuators, arranged in a 2 × 2 matrix. The principle of the actuators array and of the conveyance device are firstly presented. The control strategy of the array to generate the conveyance task is then described. A prototype of the device is presented and experimentally tested. Conveyance of the structured plate has been experimental realized in different conditions and compared with theoretical results.

show abstract

Tactile display using shape memory alloy micro-coil actuator and magnetic latch mechanism

Cited by 44 publications

References 8 publications

Using Pot-Magnets to Enable Stable and Scalable Electromagnetic Tactile Displays

Using Pot-Magnets to Enable Stable and Scalable Electromagnetic Tactile Displays

Functional properties and morphology of NiTi articulated actuation elements during thermo-mechanical cyclic tests

Characterization of a conveyance device based on a digital actuators array and a structured plate

Contact Info

Product

Resources

About