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근감과 진동촉감 피드백을 제공하는 햅틱 인터페이스용 새로운 소형 액추에이터의 개발
표동범,류세민,한병길,권동수 한국로봇학회 2013 로봇학회 논문지 Vol.8 No.3
This paper presents a new miniature haptic display to convey ample haptic information to a user of a handheld interface. There are buttons on interfaces or general electronic devices, but existing buttons provide haptic feedback of only one passive pattern to a user. Because humans perceive tactile and kinesthetic information simultaneously when they handle objects the proposed actuator provides both sensations at once. It is able to generate various levels of kinesthetic sensations when pressing a button under diverse situations. Also, vibrotactile feedback can be delivered for exciting haptic effects with numerous patterns. Its performance was evaluated in accordance with the resistive force by changing the intensity of the input current. Experiments show that the proposed actuator has the ability to provide numerous haptic sensations for more realistic and complex haptic experiences.
Development and Evaluation of an Impact Vibration Actuator using an Unstable Mass for Mobile Devices
김상연,양태헌,표동범,권동수 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.3
The most important thing in haptic interaction with mobile devices is to create vibrotactile sensationwith wide frequency range. However, it is not easy to generate vibrotactile signal with wide frequency range withconventional vibrotactile actuators. Therefore, this paper presents a miniature impact type actuator, which haswide enough frequency range to selectively stimulate mechanoreceptors, consisting of a mass, an elastic spring, ahousing, and a solenoid. To create strong impact force in wide frequency range in real-time, we adopt an unstablestructure. Due to the impact with fast rising and falling time in the proposed vibration actuator, strong impactvibration can be created over wide frequency range. We simulate the magnetic flux line of the proposed actuatorand magnetic force applied to the mass using an FEM simulation tool. We carry out an experiment in order toinvestigate the response time of the proposed actuator. Another experiment is conducted to show that the proposedactuator can create sufficient output force to stimulate human skin over a wide frequency bandwidth and can conveya variety of vibrotactile sensations to users.