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Shock and Vibration
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Shock and Vibration
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2019
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Article
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Fig 4
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Research Article
Multi-DOF Ultrasonic Actuators for Laser Beam Positioning
Figure 4
Vibration modes of the ring-type actuator when the upper ring is excited at 67.05 kHz (a, b) and the lower ring is excited at 65.80 kHz (c).
(a)
(b)
(c)