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General information |
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Wen, Li; Liang, Jianhong; Shen, Qi; Bao, Lei; Zhang, Qiang |
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InTech Open Access Publisher, 2013
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| Abstract |
Both body undulation and caudal fin flapping
play essential locomotive roles while a fish is swimming,
but how these two affect the swimming performance and
hydrodynamics of fish individually is yet to be known.
We implemented a biomimetic robotic fish that travel
along a servo towing system, which can be regarded as
“treadmill” of the model. Hydrodynamics was studied as
a function of the principal kinetic parameters of the
undulatory body and caudal fin of the model in a selfpropelled
condition, under which the time‐averaged
measured axial net force becomes zero. Thrust efficiency
was estimated from two‐dimensional digital particle
image velocimetry (DPIV) measurements in the
horizontal and mid‐caudal fin plane. The Single‐Row
Reverse Karman wake (2S) is commonly observed in
many previous studies of live fish swimming. However,
we show that a Double‐Row Two‐Paired vortices (2P)
wake was generated by the robotic model for most kinetic
parameter combinations. Interestingly, the 2S wake
emerged within the results of a narrow range of robotic
caudal fin pitch angles (0≤θ≤10°), occurring concurrently
with enhanced thrust efficiency. We also show that,
compared with the effect of body wavelength (λ), the
wake structure behind the robotic swimmer is more
sensitive to the |
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International Journal of Advanced Robotic Systems
Author: Ottaviano, Erika; Ceccarelli, Marco; Husty, Manfred; Yu, Sung-Hoon; Kim, Yong-Tae; Park, Chang-Woo; Hyun, Chang-Ho; Chen, Xiulong; Feng, Weiming; Sun, Xianyang; Gao, Qing; Grigorescu, Sorin M.; Pozna, Claudiu; Liu, Wanli; Zhankui, Wang; Guo, Meng; Fu, Guoyu; Zhang, Jin; Chen, Wenyuan; Peng, Fengchao; Yang, Pei; Chen, Chunlin; Ding, Rui; Yu, Junzhi; Yang, Qinghai; Tan, Min; Polden, Joseph; Pan, [...]
Published: 2004
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