負荷応答型可変伝達機構によるロボット関節のトルク適応
Load-Based Variable Transmission Mechanism for Robotic Applications
予圧ばねと四節リンクを用いて外部トルクに応じて伝達比を受動的に変化させる機構を提案し、シミュレーションで最大40%のトルク増幅を確認した。
詳しい要約
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著者: Sinan Emre, Victor Barasuol, Matteo Villa, Claudio Semini
分類: cs.RO
原文アブストラクト
This paper presents a Load-Based Variable Transmission (LBVT) mechanism designed to enhance robotic actuation by dynamically adjusting the transmission ratio in response to external torque demands. Unlike existing variable transmission systems that require additional actuators for active control, the proposed LBVT mechanism leverages a pre-tensioned spring and a four-bar linkage to passively modify the transmission ratio, thereby reducing the complexity of robot joint actuation systems. The effectiveness of the LBVT mechanism is evaluated through simulation-based analyses. The results confirm that the system achieves up to a 40 percent increase in transmission ratio upon reaching a predefined torque threshold, effectively amplifying joint torque when required without additional actuation. Furthermore, the simulations demonstrate a torque amplification effect triggered when the applied force exceeds 18 N, highlighting the system ability to autonomously respond to varying load conditions. This research contributes to the development of lightweight, efficient, and adaptive transmission systems for robotic applications, particularly in legged robots where dynamic torque adaptation is critical.
