Motion analysis of mother´s embracing and rocking a baby and development of excitation apparatus

Recently, the people who are under a lot of stress have increased. Too much stress may cause various physical and/or mental disorders. The final aim of our project is to develop a relaxation machine for reducing stress by using rocking vibration. As rocking vibration, motion of a mother´s embracing and rocking of a baby is adopted. In this paper, we analyze the motion of the mother´s embracing and rocking of a baby using a 3D motion capture system, and design and manufacture an excitation apparatus simulating the mother´s motions. It is found from the experimental analysis that there are two types of the mother´s motions. The both motions consist of linear motion and rotational motion. The excitation apparatus has two degrees-of freedom for linear and rotational motions.