Abstract
Fish-like aquatic robot driven by shape memory alloy (SMA) is developed. The robot has a drive tail-fin made of a flexible polypropylene plate. Two fiber-like SMAs are pasted on the both surface of the plate. The SMA used here can contract by applying electricity. When the SMA is contracted, the fin bends to the one side. By switching the electricity, active SMA changes alternately, and the robot can move the fin. Characteristics of the fin are investigated, and it is shown that the robot represents the fish-like locomotion. Also a possibility to realize a smart fin is discussed.
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