342 ジャイロ効果を利用した運動器具"パワーボール"の衝突を伴うモデリングと動的挙動の解析

概要

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The gyroscopic exercise tool utilizes the gyroscopic effect caused by the whirling motion of the high speed rotating body to train the hand muscle. This tool utilizes the contact phenomenon between the rotor and the case. 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. Conventional studies on this tool assume the continuous rolling motion of the rotor to the case. This paper does not set this assumption, and investigates the dynamical modeling of this tool considering the contact/non-contact configurations and the slip between the rotor and the case. Two kinds of motions are observed in the numerical simulation, one is the uniform precession which was observed in the conventional studies and the other is the periodically reverse precession. These two motions are physically explained, and are also observed in the experiment.
一般社団法人日本機械学会の論文
2011-09-05