Can the swimming thrust of BCF biomimetics fish be enhanced?

In this paper, a robotic fish employing a carangiform swimming mode have been developed. The tail fin mechanism with a spring and a movable pin enables a smooth adjustable motion. Experiments conducted in the laboratory aim to study the variation of robotic fish´s thrust and velocity with respect to various parameters, which includes the frequency, amplitude of oscillation, joint link, aspect ratio, free stream velocity and the spring effect. The testing also enables us to find out the relationship between various parameters and how to adjust the parameters in order to generate the maximum thrust. On the other hand, field trials have also been conducted to demonstrate the swimming capability of the robotic fish in real life situation.