Estimation of material parameters for piezoelectric actuators using electrical and mechanical quantities

The reliability of Finite Element based simulations of the electrical and mechanical behavior for piezoceramic actuators strongly depends on the accuracy of the required material parameters. For many transducer shapes, the standard methods in order to determine the material parameters are not applicable. Therefore, we developed an alternative method for the parameter estimation, namely the Inverse Method. With the aid of this method, the deviation of simulation from measurement results is minimized. In this article, we present an extended Inverse Method, which considers both, the electrical as well as the mechanical behavior of the investigated actuator.