Modeling and Control of a Link-Based Dolphin-Like Robot Capable of 3D Movements

摘要

This paper focuses on a three-dimensional (3D) dynamic model for a self-propelled, multilink dolphin-like robot to predict the dynamic behaviors of the bio-inspired artificial dolphin system within the framework of multibody dynamics. The propulsive structure involves a multilink tail and an oscillating fluke cooperatively achieving dorsoven-tral oscillations, as well as a pair of mechanical flippers performing flapping movements, which can actually be simplified as an open-chain, tree-like multibody with a mobile base. The Schiehlen method is further utilized to formulate the equations of the motion on the basis of a well-integrated kinematic and dynamic analysis of propulsive elements. A rough comparison between simulations and experiments on forward swimming and combined motions verifies the effectiveness of the formed model and corresponding locomotion control method.