This paper presents a miniature haptic actuator based on MR fluids, which is designed to convey realistic haptic sensations to users in small electronic devices. The proposed MR actuator can create various kinaesthetic sensations. The haptic sensation, which is generated in the form of resistive force, should vary according to the stroke of the actuator (or the pressed depth of the plunger). Thus, a sensing method for gauging the pressed depth should be integrated into the proposed actuator for demonstrating its real-world haptic application. To determine the pressed depth of the MR actuator, this study proposes an impedance sensing mechanism. The proposed sensing method measures the impedance change of the solenoid coil embedded in the actuator in the form of voltages to estimate the pressed depth. Using a prototype actuator, the sensing performance of the proposed sensing method, was evaluated. The results show that the sensitivity of the proposed impedance sensing method is sufficient to regulate the output resistive force over a small stroke range of the actuator.
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ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 19–21, 2012
Stone Mountain, Georgia, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4510-3
PROCEEDINGS PAPER
A Miniature MR Actuator With Impedance Sensing Mechanism for Haptic Applications
Tae-Heon Yang,
Tae-Heon Yang
Korea Research Institute of Standards and Science, Daejeon, Korea
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Sang-Youn Kim,
Sang-Youn Kim
Korea University of Technology & Education, Cheonan, Korea
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Dong-Soo Kwon
Dong-Soo Kwon
Korea Research Institute of Standards and Science, Daejeon, Korea
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Tae-Heon Yang
Korea Research Institute of Standards and Science, Daejeon, Korea
Jeong-Hoi Koo
Miami University, Oxford, OH
Sang-Youn Kim
Korea University of Technology & Education, Cheonan, Korea
Dong-Soo Kwon
Korea Research Institute of Standards and Science, Daejeon, Korea
Paper No:
SMASIS2012-8141, pp. 421-424; 4 pages
Published Online:
July 24, 2013
Citation
Yang, T, Koo, J, Kim, S, & Kwon, D. "A Miniature MR Actuator With Impedance Sensing Mechanism for Haptic Applications." Proceedings of the ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bio-Inspired Materials and Systems; Energy Harvesting. Stone Mountain, Georgia, USA. September 19–21, 2012. pp. 421-424. ASME. https://doi.org/10.1115/SMASIS2012-8141
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