Snap-through dynamics of bi-stable IPMC actuator considering beam configuration

Jin-Han Jeon; Tai-Hong Cheng; Joong-Woo Park; Il-Kwon Oh

doi:10.1117/12.843497

20 October 2009 Snap-through dynamics of bi-stable IPMC actuator considering beam configuration

Jin-Han Jeon, Tai-Hong Cheng, Joong-Woo Park, Il-Kwon Oh

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 74931N (2009) https://doi.org/10.1117/12.843497
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

The snap-through dynamics of the bi-stable IPMC actuators were investigated to generate much larger displacements and periodical stable locomotion based on jumping phenomena according to boundary conditions. First, in the clamped-free BC, two curved cantilever IPMC actuators with a constant curvature and initial tip deflections of 8mm and 16mm were fabricated from flat IPMCs through thermal treatment under hot water simultaneously to reduce the residual stresses. A flat and two curved IPMC actuators were tested to evaluate the effect of initial shape in terms of step responses, harmonic responses and frequency response function tests under small and large deformation. The snap-through phenomena for the curved IPMC actuators unlike the flat IPMC actuator were observed with much larger tip displacements, low power consumption and periodical jumps of the instant velocity. Second, in case of all-clamped BC, the large and bistable responses were observed under DC and AC excitation through the end-shortening effect. These tests were conducted with various end-shortenings of 0.25, 0.5, and 1.0 mm. The jumping phenomena of IPMC actuator was remarkably observed at their conditions, respectively. Present results show that the initial curved deflection and endshortening of the IPMC actuator strongly affects the large deformation at respective boundary conditions due to the snapthrough phenomena.

Citation Download Citation

Jin-Han Jeon, Tai-Hong Cheng, Joong-Woo Park, and Il-Kwon Oh "Snap-through dynamics of bi-stable IPMC actuator considering beam configuration", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74931N (20 October 2009); https://doi.org/10.1117/12.843497

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KEYWORDS

Actuators

Polymers

Beam shaping

Smart materials

Distortion

Electroactive polymers

Molecules

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