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Experimental research of fish-imitating propulsion

Yu Kai Huang Sheng Hu Jian Guo Chunyu(School of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)  
A robotic fish with single tail was made after the model of tuna.The speed and resistance of the robotic fish and the thrust that was produced by the tailfin of the robotic fish under the mooring condition were tested experimentally.To avoid the swing of forebody of robotic fish with only one tailfin,a kind of robotic fish with two tailfin was designed and is being used in small waterplane area twin hulls(SWATH).The experimental platform of two tailfin proprulsion was made.The experimental research of the double tail-fin propulsion was made in a pond.According to this experimental result,the double tail-fin propulsion could not only solve the shakable problem of the single tail-fin robotic fish when it′s swimming,but also had excellent propulsive efficiency and maneuverability.As a new type propulsion,robotic fish had wide application in foreground projects.
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