Abstract
In this study, the heart beat fluctuation is proposed as an evaluation index of "comfortable swing". The power spectrum of the heart beat fluctuation is examined using the developed rocking chair drive unit. In a result, it is clarified that while the power spectrum of the heart beat fluctuation in experiencing the uncomfortable swinging becomes almost the relation of 1/f^<0.9>, the power spectrum of the heart beat fluctuation in experiencing the comfortable swing is tended to become white noise in 0.15∿0.4Hz frequency range and fall in frequency range over 0.4Hz. In addition. an active rocking chair. which realizes the "comfortable swing". is developed. It is driven by an electromagnetic cylinder. Then, it is confirmed by the heart beat fluctuation that the swing is evaluated with "comfortable swing".
