Proposal and Analysis of a Pneumatic Artificial Rubber Muscle with High-Damping Characteristics that uses a Rubber Bellows

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  • ゴムベローズを用いた高減衰空気圧ゴム人工筋の提案と特性解析
  • ゴムベローズ オ モチイタ コウゲンスイ クウキアツ ゴム ジンコウキン ノ テイアン ト トクセイ カイセキ

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In order to realize a pneumatic artificial rubber muscle (PARM) with high damping characteristics, we have developed a new actuator combining an ordinary PARM with a rubber bellows that uses a narrow tube as an air throttle. In the present study, in order to experimentally clarify the dynamic characteristics of the newly developed high-damping PARM, two of the newly developed high-damping PARMs driven by a spool-type servo valve are connected in parallel to a link that has a rod as an inertial load, constituting the driving system of a single joint. The same experiment was carried out using ordinary PARMs, and the superiority of the newly developed PARM is demonstrated. The characteristics of each component of the high-damping PARM, such as the PARM, the rubber bellows, the narrow tube, and the servo valve, are modeled assuming nonlinearity. Then, using MATLAB/Simulink, a nonlinear simulator for the newly developed actuator is developed. The simulation and experimental results indicate that the developed simulator is helpful in designing the newly developed pneumatic actuator.

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