腱とリンクを組み合わせた結合・適応動作可能な指機構の設計
Design of a hybrid tendon-linkage finger with coupled and adaptive motion
3つのアクチュエータで4自由度を駆動する腱・リンクハイブリッド指を開発し、DIP関節をPIPに結合しつつ接触に応じた適応動作を実現した。
詳しい要約
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2. 先行研究と比べてどこがすごい?
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著者: Hyojae Kang, Giup Seo, Jae-Young Lee, Yeong Jae Park, Jongwoo Park, Hyunmin Do, So-Hee Park, Dongil Park, Jeongdo Ahn
分類: cs.RO
原文アブストラクト
Dexterous robotic fingers require coordinated joint motion and adaptability to object contact, while independently actuating multiple joints increases the complexity of the transmission mechanism. This paper presents a hybrid tendon--linkage robotic finger with four mechanical degrees of freedom driven by three actuators. The MCP abduction/adduction joint is driven through a bevel gear, while MCP and PIP flexion/extension are driven by separate bidirectional tendon transmissions. The DIP joint is not independently actuated but is coupled to the PIP joint through a four-bar linkage with a torsional spring and mechanical stopper. The tendon routing also introduces mechanical coupling between the MCP and PIP joints. Kinematic analysis was conducted to describe the coupled and adaptive motions, and experiments were performed to evaluate the joint motion characteristics. ArUco-based measurements showed that the coupled motion closely matched the theoretical prediction, whereas the adaptive motion was partially limited by interference between linkage components. The fabricated finger demonstrated different contact postures with cylindrical, cuboid, and irregularly shaped objects, and the mean peak fingertip force was 4.56 N. The proposed mechanism provides both coupled motion and contact-dependent adaptation without requiring an additional actuator for the DIP joint.
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