Abstract—The spherical ultrasonic motor which drives in the space environment has been developed by this research. It has been evaluated with regard to high temperature and low temperature which assumed the space environment as the previous studies. On the other hand, a vibration and a shock assumed at launch of a rocket are severe condition, but the spherical ultrasonic motor has to stand up to the vibration and the shock. So it was evaluated with regard to resistance against vibration and shock resistance to the spherical ultrasonic motor by this research. The natural frequency of the spherical ultrasonic motor was calculated and theoretical calculation about the breaking strength by the vibration was performed as evaluation method. And a result of the theoretical calculation was verified by a resonance search experiment and a stimules experiment. As a result, the resistance against vibration of the spherical ultrasonic motor was clarified. And the shock resistance of the spherical ultrasonic motor was confirmed to shock acceleration of 40 G.
Index Terms—Ultrasonic motor, resistance against vibration, shock resistance, natural frequency, space environment.
Uichi Nishizawa and Shigeki Toyama are with Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan (e-mail: n-uichi@cc.tuat.ac.jp, toyama@cc.tuat.ac.jp).
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Cite: Uichi Nishizawa, Taro Oohashi, and Shigeki Toyama, "Evaluation of Resistance against Vibration and Shock Resistance on Spherical Ultrasonic Motor," International Journal of Modeling and Optimization vol. 8, no. 2, pp. 页码, 2018.
