緯糸型形状記憶合金アクチュエータの動作特性に及ぼす経糸アルマイト線配置数の影響

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  • Effects of installed number of warp-direction alumite wire on dynamic characteristics of weft yarn-type shape memory actuator.

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<p>Our study group devised and fabricated the shape memory alloy (SMA) actuator using weft-yarn SMA element, which is consisted of a long SMA wire woven into the weft pattern for the increase of the output of SMA actuator. The increase of cooling efficiency of SMA is important to increase the responsiveness of this SMA actuator. In previous research, warp-direction alumite wires were installed in the weft yarn SMA element for the increase of the cooling efficiency. However, this alumite wires were not completely fixed in the previous actuator. Thus, new fixing system were devised and fabricated. In this study, the effects of installed the number of warp-direction alumite wires on dynamic characteristics of weft yarn-type shape memory actuator is investigated. As a result, the operating velocity from initial position to desired position decreases with the increase of number of alumite wires regardless of the weight condition. On the other hand, the operating velocity from desired position to initial position is almost constant regardless of the weight condition and the number of warp alumite wires. These tendencies are thought to be caused by the variation of the cooling efficiency and the friction between SMA wire and almite wires with the variation of the number of alumite wires.</p>

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