Identification of a piezoelectric compact actuator

Abstract

This paper describes the identification of a highly nonlinear and hysteretic piezoelectric compact actuator. A system identification technique was used based on observed data from the actuator mounted on a base structure. The parameter estimation process was conducted using the recursive least squares algorithm. Once the transfer function model has been obtained, it is required to verify whether the model is good enough or it meets the necessary requirements to represent the system. The experimental results and the SI approach indicate the effectiveness of the proposed scheme.