| Summary: | 碩士 === 國立交通大學 === 機械工程學系 === 98 === Many novel applications of Ionic polymer-metal composite (IPMC) had been developed, such as biomimetic robotic fish and wing-like actuators, capsule-type endoscope, artificial urethral sphincter, self-switching bistable actuator, etc. For almost applications, the movement type of IPMC is in bending direction. Even though the linear actuators based on IPMC are also composed of the series connection of IPMC strips. Therefore, the linear actuation of IPMC is still bending type actuators in essence. The apparatus of IPMC have the common limitation: the lack of output force. Currently, increasing the thickness of IPMC strips seems to be an effective method to reinforce the bending force. The typical thickness of an IPMC strip is about 0.2 to 0.3 mm, and the tip force is usually less than 10 gf for the length of 4 cm. And the tip force for a 2 mm thickness IPMC strip could be reached about 20 gf. Although the increasing of force is significant, but it is expensive and requires much work and time to fabricate a specimen. In this project, an approximate linear contraction type IPMC actuator is discussed. In this project, a very thick and very narrow IPMC is introduced. And this kind of IPMC is a material saving design. According to the experiment result, the very thick and very narrow IPMC worked. But the motion type of the IPMC did not the linear type as predicted. However, this material saving design is an effective way to make a very thick IPMC by using a small amount material.
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