磁性流体による接触圧力制御機能を持つ下腿義足の設計(機械力学,計測,自動制御) 小川,淳夫 大日方,五郎 長谷,和徳 中川,三吉 社団法人日本機械学会 日本機械学會論文集. C編 03875024 74 746 2562 2569 2008-10-25 2008-10-25 Design of Lower Limb Prosthesis for Controlling Contact Pressure by MR Fluid(Mechanical Systems) OGAWA,Atsuo OBINATA,Goro HASE,Kazunori DUTTA,Ashish NAKAGAWA,Miyoshi The Japan Society of Mechanical Engineers Transactions of the Japan Society of Mechanical Engineers. C In case of a lower limb prosthesis, the most important parameter is the fitting between the cut section of the leg (stump) and the socket. It has been observed that the contact pressure between the socket and the stump changes after the alignment of the lower limb prosthesis changes and also during dynamic movement such as walking or running. The main aim of this research is to design a novel socket using smart materials, such as magneto-rheological (MR) fluid, which can transform the rigidity and capacity of the socket to accommodate the dynamic movement and alignment changes. In order to determine design parameters of the socket, we conducted various experiments such as subjective evaluation of pain by the contact pressure, measurement of the stiffness of the MR bag in which MR fluid was filled up. The MR socket was actually developed as a prototype based on the above experiments. The fitting between the stump and the socket was investigated subjectively and also based on the pressure sensors. The contact pressure and the pain felt by the amputee using a lower limb prosthesis have become smaller in the proposed MR socket, especially, on the patellar tendon. The proposed MR socket had a possibility to improve the fitting between the stump and the socket. 小川,淳夫 OGAWA,Atsuo 名古屋大学大学院工学研究科 日本聴能言語福祉学院義肢装具学科 Graduate School of Engineering, Nagoya University 大日方,五郎 OBINATA,Goro 名古屋大学エコトピア科学研究所 長谷,和徳 HASE,Kazunori 名古屋大学大学院工学研究科 DUTTA,Ashish 名古屋大学大学院工学研究科 中川,三吉 NAKAGAWA,Miyoshi 日本聴能言語福祉学院義肢装具学科