Department of Mechanical Engineering, Sharif University of Technology (SUT)
This paper presents simplified hydrodynamics model for a biomimetic robot fish based on quantitative morphological and kinematic parameters of crangiform fish. The motion of four Pangasius sanitwongsei with different length and swimming speed were recorded by the digital particle image velocimetry (DPIV) and image processing methods and optimal coefficients of the motion equations and appropriate location of joints are empirically derived. The swimming speed of fish can be adjusted by changing oscillating frequency, amplitude and the length of oscillatory part, respectively. Experimental results show that the oscillating amplitude increases dramatically from 1/3 of body and is very small near the head. So the second order function which describes wave amplitude of Pangasius sanitwongsei undulatory movement equation was found and the oscillatory motion of the biomimetic robot fish will be simulated according to this equation.
Hirata, K., (1999). Design and Manufacturing of a Small Fish Robot, proc. of Japan Society for Design Engineering, 99, 29-32.
Zhou,C.; Tan, M.; Gu, N. Z.; Cao, S.; Wang, L., (2008). The Design and Implementation of a Biomimetic Robot Fish, International Journal of Advanced Robotic Systems, 5 (2).
Asadian Ghahferokhi, M.; Abbaspour, M., (2013). Experimental Hydrodynamics Analysis of Trout Locomotion for Simulation in Robot-Fish, Journal of Basic and Applied Scientific Research, 3 (4), 221-226.
Lighthill, M. J., (1960). Note on the swimming of slender fish, Journal of Fluid Mechanics, 9, 305–317.
Lighthill, M. J., (1969). Hydromechanics of aquatic animal propulsion, Annul Rev. Fluid Mech. 1, 413–447.
Lighthill, M. J., (1970). Aquatic animal propulsion of high hydro mechanical efficiency, J. Fluid Mech. 44, 265–301.
Lauder, G. V.; Nauen, E. G.; Drucker, E., (2002). Experimental hydrodynamics and evolution: function of median fins in ray- finned fishes. I. & C. Biology, 42 (5), 1009- 1017.
Anderson, J. M.; Triantafyllou, M. S.; Kerrebrock, P. A., (1997). Concept design of a flexible-hull unmanned undersea vehicle, Proceedings of the 7th International Offshore and Polar Engineering Conference, 82–88.