Abstract
We have developed a structure of a contraction type actuator and investigated various characteristics of this actuator. In our previous study, we have conducted a long-term experiment to evaluate the durability of the PVC gel actuators. It was found that the displacement has a variation of decrease. In this study. we investigated the mechanism of the decrease of displacement by changing the electrodes type of the actuator. And we found there was a difference between the types of electrodes.
