Identification and control of piezoceramic actuator using nonsmooth sandwich model

As the hysteresis embedded in the piezoceramic actuator is a nonsmooth nonlinear and rate-dependent function with multivalued mapping,also the input and output of the hysteresis cannot be measured directly,it is very difficult to use the traditional schemes to identify and control such a system.In this paper,a piezoceramic actuator is described by a sandwich model and identified by a two-stage method based on the degeneration inputs.Then,according to the obtained sandwich model with hysteresis,an internal model control scheme is proposed.The experimental results are presented to illustrate the performance of the proposed identification and control scheme.