Compact piezoelectric tripod manipulator based on a reverse bridge-type amplification mechanism

We report a hierarchical piezoelectric tripod manipulator based on a reverse bridge-type displacement amplifier. The reverse bridge-type amplification mechanism is pre-strained by each piezo-stack actuator up to 60 m and is cross-stacked in a series arrangement to make a compact and high-stroke mani...

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Bibliographic Details
Published in:Smart materials and structures 2016-09, Vol.25 (9), p.95028-95040
Main Authors: Na, Tae-Won, Choi, Jun-Ho, Jung, Jin-Young, Kim, Hyeong-Geon, Han, Jae-Hung, Park, Kwang-Chun, Oh, Il-Kwon
Format: Article
Language:English
Subjects:
Actuators
Amplification
amplifier
Displacement
manipulator
Manipulators
mechanism
piezoelectric
Piezoelectricity
Strokes
tripod
Tripods
Voltage
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Summary:We report a hierarchical piezoelectric tripod manipulator based on a reverse bridge-type displacement amplifier. The reverse bridge-type amplification mechanism is pre-strained by each piezo-stack actuator up to 60 m and is cross-stacked in a series arrangement to make a compact and high-stroke manipulator having load-bearing characteristics. The designed manipulator with three degrees of freedom is compact with a height of 56.0 mm, a diameter of 48.6 mm and total weight of 115 g. It achieves a translational stroke of up to 880 m in heaving motion and a tilting angle of up to 2.0° in rotational motion within the operating voltage and power range of the piezoelectric stack actuator. A key feature of the present design is built-in and pre-strained displacement amplification mechanisms integrated with piezoelectric stacked actuators, resulting in a compact tripod manipulator having exceptionally high stroke and load-bearing capacity.
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/25/9/095028