Mr. Da Wang Profile

Da Wang

at Harbin Institute of Technology

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Proceedings Article | 18 April 2008 Paper

Application of macro fibre composite in driving a tail of a biomimetic fish

Da Wang, Weilong Yin, Yanju Liu, Jinsong Leng

Proceedings Volume 6928, 69281H (2008) https://doi.org/10.1117/12.775953

KEYWORDS: Microsoft Foundation Class Library, Composites, Biomimetics, Actuators, Aluminum, Structured optical fibers, Resistance, Polymers, Ferroelectric materials, Smart materials

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The Macro Fiber Composite (MFC) is an actuator that offers high performance and flexibility. The application of MFC in the field of driving biomimetic tail is discussed in the paper. Making full use of the d33 effect, a piece of aluminum lamina with certain thickness is sticked in order to make the structures divided by the PZT fibers in MFC dissymmetrical. When applying voltage on the MFC, the structure will have a certain bending angle which is utilized to offer swinging power for the tail. In this paper, the ideal driving effect has been got with the limited driving force via the study of material property, material thickness, shape and size of the metal piece connected to the MFC, method of connection, the shape of the under water part of the fish. A reasonable shape and swinging strategy for biomimetic fish is designed according to the observation to the movement of alive fish and the study of bionics. The results of the experiment indicate that the largest extend of the tail's swinging angle in the air is 4 degree. The available frequency for the fastest speed is 2.5Hz. Comparing with the traditional biomimetic fish, it has the advances of small cubage, little noise, simple structure, and could be controlled in speed and extent because there is no motor inside. And the limit ability of driving, the uncontrollable feature of floating and sinking, and the existence of the power wires need to be solved in the coming research.

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