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Fin-based propulsion systems of fishes perform well for both high-speed cruising and high maneuverability, which inspires different fin propulsors for autonomous underwater vehicles. Here, we present a novel fish-fin actuator composed of a series of shape memory alloy (SMA) plate couple. Both SMA plates, whose microstructure is either martensite or austenite, are individually arranged in parallel...
Crucians propel themselves through the water primarily either with their body and tail (axial-based locomotion) at high swimming speed or with their greatly expanded pectoral fins (pectoral-fin-based locomotion) at low swimming speed. They also use their pectoral fins to adjust stability in still motion. In this paper, we present recent experimental research on pectoral fin structure, fin locomotion,...
Design, development, and experimental investigations of an undulating finned body system are presented for alternate means of propulsion using shape memory alloys (SMA) as actuators. The undulating waveform of the anguilliform mode was chosen as the design and development of a biomimetic undulating system. The designed body consists of three segments made of flexible polyurethane, which is actuated...
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