Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 02, 2018 - June 05, 2018
A pneumatic artificial muscle is an air pressure-activated rubber actuator. It is lightweight and high in power density compared to motorized actuators and fluidic cylinders. The authors have developed a straight-fiber-type pneumatic artificial muscle (SF-ARM) with high output and contraction amounts compared to those of the widely used McKibben type artificial muscle. Until now, the ratio between the inside diameter of the SF-ARM and the operating part length was examined. However, there is a limit in extending the fatigue life by decreasing the aspect ratio. Therefore, in this study, we have extended the life by changing stress amplitude. As a result, fatigue life could be improved by reducing stress amplitude.
