Abstract
Stingrays can undulate their wide pectoral fins to thrust themselves and swim freely underwater. Many researchers have used bionics to directly imitate their undulating mechanism and manufacture undulatory underwater robots. Based on the limitations of the existing undulatory underwater robots, this paper proposes a novel undulatory propulsion strategy, which aims to use the stingray undulating mechanism more thoroughly. First, the mathematical models of both traditional and novel structures are established to accurately describe their undulating mechanism. Then, based on the dynamic mesh technology, the flow field vortex structure they generated is analyzed through fluid-structure interaction simulation, and the thrust force and lateral force generated by them are calculated, which verified that this novel propulsion strategy is indeed more effective. Finally, a prototype robot based on the improved propulsion strategy is manufactured. Compared with the existing stingray robots, the prototype has obvious advantages, thus verifying the accuracy of the simulation results.
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Acknowledgment
The authors would like to thank the editors and anonymous reviewers for their detailed comments which helped to improve the quality of this paper. This work is supported by the National Science Foundation of China (No. 91748123) and the Natural Science Foundation of Shaanxi Province (Grant No. 2019JM-145). The authors thank Haiyan Cheng and Tao Wang for insightful discussions, and Yingjie Li and Chengpeng Ma for their assistance with the development of the simulation software testing.
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Li, Q., Zhang, J., Hong, J. et al. A Novel Undulatory Propulsion Strategy for Underwater Robots. J Bionic Eng 18, 812–823 (2021). https://doi.org/10.1007/s42235-021-0057-4
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DOI: https://doi.org/10.1007/s42235-021-0057-4