Abstract
The gyroscopic exercise tool which utilizes the gyroscopic effect caused by the whirling motion of the high speed rotating body to train the hand muscle is considered. When the input motion with 3-5 Hz is added to the case, the rotor spins in thousands rpm whirling with the precession motion which is synchronous to the input case motion. This tool utilizes the contact phenomenon between the rotor and the case. This paper develops its dynamical model considering the transition among non-contacting, rolling, and sliding conditions. The dynamical characteristics of its motions are numerically investigated, and are also confirmed in the experiment.
