740 形状記憶合金アクチュエータの高速作動に関する研究

概要

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Shape memory alloys (SMA) have the ability to "remember" their original shape, that is, a deformed SMA will recover its shape upon heating. SMA is suitable for actuator applications since it generates large displacement during shape recovery and here with large recovery force if its strain is constrained. The main drawback of SMA is its slow response. Due to this, SMA actuators have only been applied to static or quasi-static systems. In this study, direct electric heating was used to improve the response of SMA actuators. Both the displacement response in unconstrained condition and the response of recovery force under constrained condition were investigated for different heating parameters. The shortest response time of 3 milliseconds and the maximum recovery force of 1290kgf were achieved for test pieces of Ф5×50mm.
社団法人日本機械学会の論文
2000-09-01