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Shock and Vibration
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2019
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Article
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Fig 5
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Research Article
Multi-DOF Ultrasonic Actuators for Laser Beam Positioning
Figure 5
Vibration modes of the cylinder-type actuator when the upper cylinder is excited at 81.55 kHz (a, b) and the lower cylinder is excited at 80.90 kHz (c).
(a)
(b)
(c)