LIU Huaimin, WANG Xiangjiang

 

(School of Mechanical Engineering, University of South China, Hengyang 421001, China)

 

 

Abstract: The trilayer conducting polymer actuators based on polypyrrole is a kind of ionicEAP actuators. Aiming at the dynamic characteristics of the trilayer conducting polymer actuators, the measurement system was established. The equivalent circuit model was established according to the behavior of swelling during oxidation and contraction during reduction, and experimentally verified. The system identification of frequency characteristic for obtaining the highorder transfer function model of the actuator was used to improve the control model accuracy of these actuators. The results indicate that the equivalent circuit model analysis can effectively describe its input / output behavior, transfer function model is accurate and effective enough in predicting the dynamic displacement response of the actuators.

 

Key words: trilayer conducting polymer actuators; dynamic characteristic; equivalent circuit; the transfer function model