TriphiBot: FOC推進と偏心設計を組み合わせた水陸空三棲ロボット
TriphiBot: A Triphibious Robot Combining FOC-based Propulsion with Eccentric Design
クアッドコプター構造に受動輪を加えた最小構成で、空・陸・水の三領域を移動できるロボットを提案。偏心重心設計とFOCベースの統合推進、HNMPC-PID制御により効率的な多領域移動とモード遷移を実現した。
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著者: Xiangyu Li, Tiancheng Lai, Mingwei Lai, Junxiao Lin, Mengke Zhang, Junping Zhi, Chao Xu, Fei Gao, Yanjun Cao
分類: cs.RO
原文アブストラクト
Triphibious robots capable of multi-domain motion and cross-domain transitions are promising to handle complex tasks across diverse environments. However, existing designs primarily focus on dual-mode platforms, and some designs suffer from high mechanical complexity or low propulsion efficiency, which limits their application. In this paper, we propose a novel triphibious robot capable of aerial, terrestrial, and aquatic motion, by a minimalist design combining a quadcopter structure with two passive wheels, without extra actuators. To address inefficiency of ground-support motion (moving on land/seabed) for quadcopter based designs, we introduce an eccentric Center of Gravity (CoG) design that inherently aligns thrust with motion, enhancing efficiency without specialized mechanical transformation designs. Furthermore, to address the drastic differences in motion control caused by different fluids (air and water), we develop a unified propulsion system based on Field-Oriented Control (FOC). This method resolves torque matching issues and enables precise, rapid bidirectional thrust across different mediums. Grounded in the perspective of living condition and ground support, we analyse the robot's dynamics and propose a Hybrid Nonlinear Model Predictive Control (HNMPC)-PID control system to ensure stable multi-domain motion and seamless transitions. Experimental results validate the robot's multi-domain motion and cross-mode transition capability, along with the efficiency and adaptability of the proposed propulsion system.
