心地よい揺らぎに関する基礎研究

（人が心地よくなるように体を動かしている時の振幅ゆらぎに関する周波数解析）

抄録

It is necessary to examine comfortable vibrations and swinging motions in order to use in the development of a human-machine interface. The author focuses on the amplitude fluctuations of swing motions produced by humans for being comfort oneself. The swing motions occurring when walking comfortably, hopping on a pogo stick, bouncing on an exercise ball, and swinging on a swing were measured using a portable acceleration measurement system to examine the period fluctuations. In this study, the amplitude fluctuations of the acceleration waves are obtained using the same data, and the power spectra are examined. As a result, the power spectra shows a downward slope within a low-frequency range; that is, they are similar to the property of 1/f. This tendency remains to the higher frequency compared with the period fluctuation. Further it is clarified that the holistic approximated lines of these power spectra have about the same magnitude except of the hopping case.