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Mobile haptic devices are being studied extensively because they have great potential for use as information transfer devices. Amemiya et al. proposed a method for haptic feedback with a slider-crank mechanism that uses an asymmetrical drive. We have recently proposed a haptic device that uses a small two degree-of-freedom (2-DOF) oscillatory actuator. Using this actuator, we have investigated the...
This paper proposes an evaluation method of vibration reduction for a linear oscillatory actuator using a fundamental frequency force. We have evaluated vibration reduction by the actuator through an experiment, but we did not evaluate it. Therefore we analyzed the frequency of the vibration waveform, and evaluated the vibration reduction of the first harmonic of the vibration waveform. As a result,...
Linear resonant actuators (LRAs) use mechanical resonance and operate at high efficiency. However, the amplitude of LRAs do not follow target value when large external loads are applied. As a solution, it is effective to utilize electrical resonance and generate high current. In this paper, we propose a driving method to use electrical resonance. The effectiveness of the proposed method is verified...
Linear oscillatory actuators (LOAs) have been used in a wide range of applications because they have a lot of advantages: high efficiency, simple structure, easy control, etc. [1]. Small-sized LOAs have a large potential to be used as handheld haptic devices in the near future. Haptic devices that generate a force vector using asymmetric acceleration can create the illusion of a pulling sensation...
Linear resonant actuators (LRAs) have been used in a wide range of applications [1] because they can reciprocate in a comparatively short stroke in spite of their compact size and light weight. However, the amplitude of LRAs severely decreases when external loads are applied. With applications such as electric shaver or air compressors, the amplitude of the mover needs to be able to be arbitrary controlled...
Mobile haptic devices are being studied extensively as they have a great potential to be used as information transfer devices. Amemiya and Maeda proposed a method for haptic feedback by a linear oscillator using asymmetrical drive. We have then proposed a small two degree-of-freedom oscillatory actuator for application as a haptic device. Using this actuator, we were able to reproduce asymmetric acceleration...
This paper investigates the detailed effects on language learners of various communication tools meant to improve course coordination. Activities with video conferencing, chat, and BBS were introduced as 3-week language exchange sessions in one semester. Students exchanged information and opinions on Japanese culture with students learning the Japanese language at a research-based university in Melbourne,...
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