Two methods to identify hysteresis in smart actuators

Intelligence is the trend of this world. Smart material structure is a hotspot for it can be used in the area of aeronautics, astronautics, biology and medicine, etc. Smart actuator and smart sensor are two main parts of smart material structure. Hysteresis is a nonlinear phenomenon existing in a large quantity of smart materials which can lead to bad effects on control plants. Preisach model is widely used in the modeling of smart materials. The I/O data of smart actuator was obtained based on first order reversal curves (FORCs), and theoretical research of two methods to identify the classical Preisach model was studied. The simulation and experimental results of a smart actuator - WIDS-IA piezo actuator show the validity and the consistency of these two methods.