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    Modelling of robotic manta ray propelled by servo-actuated pectoral fins

    Date
    2021
    Author
    Chitti, Sandeep Reddy
    Chen, Zheng
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    Citation
    Chitti, S. R., & Chen, Z. (2021). Modelling of robotic manta ray propelled by servo-actuated pectoral fins. International Journal of Robotics and Automation, 36(6), 416-424. doi:10.2316/J.2021.206-0467
    Abstract
    In this research, a two-dimensional (2D) manoeuvrable bio-mimic robotic manta ray propelled by two servo-actuated pectoral fins is developed. To fulfil the driving requirements for propelling the robotic manta ray, a single fin ray is used for each pectoral fin. Servos are used to drive the fin rays and generate required deformations on the pectoral fin. A computational fluid dynamic (CFD) model, which captures the thrust forces generated by the three-dimensional kinematic motion, is developed. A 2D dynamic model, which incorporates the CFDs of pectoral fin and the body dynamics of the robot, is then developed. Experimental study revealed that the forward velocity was in a nearly linear relation with the flapping frequency, while the angular velocity depends on the differences between the flapping frequencies of two pectoral fins. A forward speed of 0.53 body length per second and angular velocity of nearly 1.25 rad/s were achieved by the robot, and the non-linear dynamic model was validated by experiments.
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    URI
    https://doi.org/10.2316/J.2021.206-0467
    https://www.actapress.com/Abstract.aspx?paperId=54395
    https://soar.wichita.edu/handle/10057/22138
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