水中四脚ロボットの設計と姿勢制御
Design and Attitude Control of an Underwater Quadruped Robot
防水モータハウジングを備えた再現可能な水中四脚ロボットを設計し、SO(3)上の誤差定式化に基づく閉ループ姿勢制御をシミュレーションと水槽実験で検証した。
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著者: Davide Molinaroli, Mohit Singh, Kostas Alexis
分類: cs.RO
原文アブストラクト
Legged robots are versatile on land, but their use in underwater environments remains limited. Extending quadruped locomotion to water enables amphibious mobility with applications in inspection, environmental monitoring and disaster response. This paper presents the design, modeling, and experimental validation of a reproducible underwater quadruped robot. The robot is built around custom waterproof motor housings machined from polyoxymethylene plastic, which use off-the-shelf O-rings and dynamic shaft seals. A simplified model is derived to describe the dynamics of this underwater legged system, capturing how drag forces on spherical end effectors transmit torque to the floating base. Building on this model, a closed-loop attitude controller is developed using an error formulation defined on the special orthogonal group SO(3). The controller is evaluated both in simulation and experimentally in a water tank, where the robot tracks desired orientation setpoints in roll, pitch and yaw.