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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.

Motion Characteristics of Loop Type Elliptic Resonator