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.