About the author
Dongbum Pyo received the B.S. degree in Mechanical Engineering from Korea University, Seoul, Korea (2010) and the M.S. degree in the Robotics Program from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea (2012). He is currently a Ph.D. student in Mechanical Engineering at the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. His current research interests include haptics (flexible tactile sensors and actuators, and interfaces), and human computer interaction.
About the author
Tae-Heon Yang received the B.S. degree in Mechanical Engineering from Yonsei University, Seoul, Korea, in 2006, and the M.S. (2008) and Ph.D. (2012) degrees in Mechanical Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. He is currently a senior research scientist at the Korea Research Institute of Standards and Science (KRISS), Daejeon, Korea. His research interests include haptics (tactile actuators, tactile sensors and haptic interfaces), polymer devices (electroactive polymers and pressure resistive materials), and national measurement standards for pressure and vacuum.
About the author
Semin Ryu received the B.S. degree in Mechanical Engineering from Pusan National University, Pusan, Korea (2011) and the M.S. degree in Mechanical Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea (2013). He is currently a Ph.D. student in Mechanical Engineering at the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. His research interests include haptics (soft tactile actuators, sensors and interfaces) and human computer interaction.
About the author
Dong-Soo Kwon received the B.S. degree from Seoul National University, Seoul, Korea, in 1980, the M.S. degree from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 1982, and the Ph.D. degree from the Georgia Institute of Technology, Atlanta, in 1991, all in mechanical engineering. From 1991 to 1995, he was with the research staff of the Oak Ridge National Laboratory. He is currently a Professor of mechanical engineering; the Director of the Center for Future Medical Robotics; the Director of the Human Robot Interaction Research Center, KAIST; and the Director of KAIST Global Institute for Talented Education. He is a member of the IEEE RAS AdCOM, the Korean Society of Mechanical Engineers. His current research interests include haptics, telerobotics, human-robot interaction, and medical robots.
Journal Reference
Sensors and Actuators A: Physical, Volume 233, 2015, Pages 460-471.
Dongbum Pyo1, Tae-Heon Yang2, Semin Ryu1, Dong-Soo Kwon1
[expand title=”Show Affiliations”]
- Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
- Center for Mass and Related Quantities, KRISS, 267 Gajeong-ro, Yuseong-gu, Daejeon 305-340, Republic of Korea
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Abstract
In this study, a novel linear impact-resonant actuator was proposed for mobile device applications. The most significant issue in mobile haptic actuators is the ability to provide various vibrotactile and alert functions despite their size and power consumption limitations. This study aimed to achieve fast and strong impact vibrations over a wide frequency range, including the resonant frequency, which decoupled the intensity and frequency of the vibration to achieve both fruitful vibrotactile feedback and strong alarming vibration. To accomplish this, a new mechanism was proposed that can amplify the impact force at the end of the stroke and increase the speed of the response. The magnetic flux path was optimized using an equivalent magnetic circuit model to maximize the electromagnetic force. The performance of a prototype actuator (11 mm × 9 mm × 3.2 mm) was evaluated in terms of the response time and vibration acceleration amplitude under an input power of 0.3 W. The experimental results clearly showed that the proposed actuator could create a vibration acceleration that was greater than 2 g over a frequency range of 1–210 Hz with a fast response of 4 ms and extremely short residual vibration. In addition, a stronger impact force of around 3 g could be generated near the resonant frequency of 190 Hz.
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