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Azobenzene liquid-crystalline polymer의 S-motion을 이용한 톱니바퀴 작동 메카니즘
김홍석(Hongseok Kim),성희준(Heejun Sung),김현수(Hyunsu Kim),조맹효(Maenghyo Cho) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Azobenzene liquid-crystal networks(LCNs) shrink under ultraviolet(UV) light irradiation and return to its original shape under visible light irradiation. We experimented one-way gear mechanism by using the LCN films. Generally used bending motions can not operate gear in one direction because the LCN film can be blocked by the teeth of the gear when returning to original position after it pushes the gear. Therefore, we attached an articulated device to the LCN film and separate the LCN film into the top part and the bottom part. First, the LCN film pushes the gear and become S shape by irradiating the top part of the LCN film when returning to the original position. By applying the proposed S motion, the LCN films can operate the gear in one direction without being jammed by the teeth of the gear. We have implemented the gear operating experiments and verified the proposed mechanism. We expect that the motion proposed in this study can be applied to various fields of the soft robot requiring precise fabrication or to the movement optimization fields to avoid obstacles.