Mechanism Design of a Bionic Robotic Fish

Abstract

In recent years, bionic robot fish have received more and more attention and have been applied in many fields, such as underwater detection, underwater archaeology, and military field. The main reason is that the propulsion and propulsion efficiency of the bionic fish are high, and the swimming performance is excellent, which is suitable for underwater operation. This paper studies the mechanism design of bionic fish which is suitable for underwater operation. The presented robotic fish consists of the power transmission mechanism of tail and the rising-falling mechanism of chest. The swing mechanism of tail uses DC motors as driver, and the transformation mechanism is added at the tail to turn the rotary motion of motor into swing movement. The pectoral fins wobble mechanism is used as the rising and falling mechanism, which is conducive to raising the swing frequency.