形状記憶合金テープのねじりを利用した回転駆動素子の設計

抄録

In order to develop the two-way rotary driving actuator using shape memory alloy (SMA) tapes, the graphical method to design the actuator was proposed based on the torsional deformation properties of SMA tapes. The blind model driven by the two-way rotary element was demonstrated. The results obtained are summarized as follows. (1) The torsional deformation properties of the SMA tape and the superelastic alloy (SEA) tape were obtained. The two-way rotary actuator was composed of the twisted SMA tape and the flat SEA tape in series. The twisting angle and torque which vary depending on temperature can be obtained based on the design chart. The behavior of the two-way rotary actuator with a simple mechanism can be estimated by the proposed design method. (2) The automatically opening and closing blind driven by sunlight was demonstrated. The blind was controlled by using the two-way rotary element with the SMA tape and the SEA tape. In the two-way rotary element, the SMA tape was heated by sunlight through the Fresnel lens. The behavior of the blind can be achieved based on the proposed design method of the two-way rotary driving element.