JRM Vol.26 No.5 pp. 638-648
doi: 10.20965/jrm.2014.p0638


Fluid-Structure Interaction Analysis of a Soft Robotic Fish Using Piezoelectric Fiber Composite

Wenjing Zhao, Aiguo Ming, Makoto Shimojo,
Yohei Inoue, and Hiroshi Maekawa

Department of Mechanical Engineering and Intelligent Systems, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182-8585, Japan

March 28, 2014
August 22, 2014
October 20, 2014
biomimetic robotic fish, soft robot, piezoelectric fiber composite (PFC), fluid-structure interaction (FSI), propulsion performance
Model of soft robotic fish

Designing a high-performance soft robotic fish requires considering the interaction between the flexible robot structure and surrounding fluid. This paper introduces fluid-structure interaction (FSI) analysis used to enhance the hydrodynamic performance of soft robotic fish using piezoelectric fiber composite (PFC) as the propulsion actuator. The basic FSI analysis scheme for soft robotic fish is presented, then the numerical model of the actuator, robot structure, and surrounding fluid are described based on the FSI analysis scheme. The FSI analysis of the soft robotic fish is performed through these numerical models. To evaluate the effectiveness of FSI analysis, coupling simulation and experimental results are compared. We found that the calculated results of propulsive force and deformation displacement were similar to those for experiments. These results suggest that FSI analysis is useful and is applicable to evaluating propulsion characteristics of the soft robotic fish to improve performance.

Cite this article as:
W. Zhao, A. Ming, M. Shimojo, <. Inoue, and H. Maekawa, “Fluid-Structure Interaction Analysis of a Soft Robotic Fish Using Piezoelectric Fiber Composite,” J. Robot. Mechatron., Vol.26, No.5, pp. 638-648, 2014.
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