A Bio-Inspired Robot With Undulatory Fins and Its Control Methods

This paper proposes a bio-inspired robot with undulatory fins and summarizes its control methods. First, three basic motions, forward/backward swimming, diving/rising motion, and turning, are implemented and evaluated by experiments. Next, a hybrid control that combines active disturbance rejection control with a fuzzy strategy is presented to achieve closed-loop depth and course control according to the evaluation of the three basic motions. Finally, waypoint tracking with a line-of-sight guidance system based on a finite-state machine for this bio-inspired robot is presented. The results of swimming experiments are provided to illustrate the validity of the proposed methods.