Abstract:
This thesis aims to study motion of a fish-robot, under thunniform mode, which composes of body,
peduncle and flapping tail. The robot moves by oscillating angles of peduncle and flapping tail,
known as heaving and pitching, respectively. We determine the equations of motion by using the
total kinetics energy as the Lagrangian and applying Euler-Lagrangian principle. This research
assumes that the fluid flow is two-dimensional, inviscid, incompressible, and irrotational.
Additionally, the effects of free and central vortex are ignored. The results of oscillation and
undulation motion are compared with the simulation and the real implementation.