著者

Ryo Hanashima Takumi Tokuda Masaaki Mochimaru Junji Ohyama

出版者

Fuji Technology Press Ltd.

雑誌

International Journal of Automation Technology (ISSN:18817629)

巻号頁・発行日

vol.17, no.3, pp.248-261, 2023-05-05 (Released:2023-05-05)

参考文献数

45

被引用文献数

1

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Posture learning is required in rehabilitation and in sports such as yoga and martial arts. Virtual reality (VR) systems are being used to learn posture by superimposing the postures of the learner and instructor in cyberspace using avatars. In this study, we examined whether the presented perspective of the avatar (first-person vs. third-person perspective) and visuo-tactile feedback (tactile correct feedback + visual feedback vs. tactile incorrect feedback + visual feedback vs. visual only feedback) are effective for the posture learning. The results of an experiment (N = 24) suggested that use of the third-person perspective may result in accurate learning of the head position as compared with first-person perspective. Visuo-tactile feedback was found to improve the subjective rating on the ease of learning, while the presentation method in which tactile feedback is given when body position is correct was found to be more effective than tactile feedback given when body position is incorrect. The sense of agency was maintained at a high level under all conditions for perspective and visuo-tactile feedback and may have improved the learning accuracy of posture. The findings of this study are expected to contribute to the design of effective perspective and tactile presentation in VR-based motor learning.

著者

Lei Zhou Jingjie Wu

出版者

Fuji Technology Press Ltd.

雑誌

International Journal of Automation Technology (ISSN:18817629)

巻号頁・発行日

vol.16, no.4, pp.386-402, 2022-07-05 (Released:2022-07-05)

参考文献数

125

被引用文献数

9

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Precision motion systems are the core of a wide range of manufacturing equipment and scientific instruments, and their motion performance directly determines the quality and speed of the associated manufacturing or metrology processes. Magnetically levitated precision motion systems, where the moving target is supported by magnetic forces and without any mechanical contact, provide advantages of frictionless motion, vacuum compatibility, and contamination-free operation. These features endow the magnetic levitation technology with the capability to deliver excellent overall performance for precision positioning systems. Through decades of research and engineering efforts, significant advances have been made in the actuation, sensing, design, and control of magnetically levitated precision motion systems. This paper provides an introduction to the fundamentals of the feedback control, actuation, and sensing for the magnetic levitation technology, and provides a comprehensive literature review of various magnetically levitated precision positioning systems developed over the past three decades. The final part of this paper identifies several challenges in the design and control of today’s precision motion systems using magnetic levitation and provides an outlook on the possible directions for future research and development.