Fractional order model identification for Electro-Active smart actuator

Ion-exchange Polymer-Metal Composites known as a type of Electro-Active smart material has complex mechanism, and takes on nonlinear characteristic, which blocks its development and utilization. In this paper, a new model for electro-active smart actuator based on non-integer order models is proposed. An experimental setup has been realized to study the electro-active smart actuator non-integer behavior and an algorithm based on Marquardt of least squares recursive identification has been developed in order to identify a fractional order model of electro-active smart actuator, and the fractional order simulation model is designed comparing the integer order model. Simulation results demonstrate that the behavior of fractional order model is much better than the integer order model, and fractional order model of electro-active smart actuator can achieve better performance.