Piezoelectric Material Non-Linear Characteristics, Compensation Methods and Application

Abstract

Piezoelectric materials are capable of converting the mechanical stress to the electrical charge and vice versa. These piezoelectric effects made them useful for sensors and actuators in many applications, such as in the control of structural vibration. Nonlinear hysteresis is one of the inherent characteristics of the piezoelectric material, which affect their performance. This characteristic has been widely studied and can be compensated using operator-based or differential-based models. Another important characteristic to be considered is creep. It has caused slow drift in the actuation process. In general, the compensated method can be divided into two group; open and closed loop methods. The non-linear characteristics of the piezoelectric material is important to be characterized and compensated, in particular for used in the Active Vibration Control (AVC) system.