Motion Characteristics of Loop Type Elliptic Resonator

Tohru Sasaki; Kunio Koizumi; Motofumi Sasaki

doi:10.20965/jrm.2008.p0061

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JRM Vol.20 No.1 pp. 61-67

doi: 10.20965/jrm.2008.p0061

(2008)

Paper:

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Motion Characteristics of Loop Type Elliptic Resonator

Tohru Sasaki, Kunio Koizumi, and Motofumi Sasaki

Graduate School of Science and Engineering, Toyama University, 3190 Gofuku, Toyama 930-8555, Japan

Received:

April 20, 2007

Accepted:

June 27, 2007

Published:

February 20, 2008

Keywords:

dynamics of machinery, vibration of mechanism, forced vibration, piezo-element

Abstract

This paper deals with characteristics of the elliptic resonator. The resonator consists of loop and leg part, respectively. Each part was actuated by bimorph type piezoelectric member. The deflection of loop part and the bending of leg part generated by piezoelectric bimorphs makes an elliptic motion at the center point of the upper member. If resonators are put in a train and are actuated at the same frequency, it can feed objects on the upper surface of its train. There are two type of resonator, arch type and pentagonal type. Arch type resonator generates big amplitude on the center of upper surface. Bending its under member, pentagonal type resonator generates amplitude on the whole upper surface. Calculated results show that a shape of resonator influences on natural modes and natural frequencies. The trial one could generate elliptic motion in arbitrary phase with both type resonator. A pentagonal type resonator with notch reinforces its torsional stiffness and can generate necessary natural modes and an elliptic vibration without generating other natural modes.

Cite this article as:

T. Sasaki, K. Koizumi, and M. Sasaki, “Motion Characteristics of Loop Type Elliptic Resonator,” J. Robot. Mechatron., Vol.20 No.1, pp. 61-67, 2008.

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References

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This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.

[1] [1] R. Kanno, S. Tadokoro, M. Hattori, T. Takamori, and K. Oguro, “Modeling of ICPF (Ionic Conducting Polymer Gel Film) Actuator (1st Report, Fundamental Characteristics and Black-Box Modeling),” Transactions of the Japan Society of Mechanical Engineers, Series C, Vol.62, No.598, pp. 2299-2305, Jun., 1996.

[2] [2] R. Kanno, S. Tadokoro, T. Takamori, and K. Oguro, “Modeling of ICPF (Ionic Conducting Polymergel Film) Actuator (3rd Report, Considerations of A Stress Generation Function and An Approximately Linear Actuator Model),” Transactions of the Japan Society of Mechanical Engineers, Series C, Vol.63, No.611, pp. 2345-2350, Jul., 1997.

[3] [3] B. Koc, P. Bouchilloux, and K. Uchino, “Piezoelectric Micromotor Using a Metal-Ceramic Composite Structure,” IEEE Transactions of Ultrasonics, Ferroelectrics and Frequency control, Vol.47, No.4, pp. 836-843, Jul., 2000.