Hysteresis nonlinearity compensator for piezoelectric actuator

Abstract

The purpose of this paper is to improve the hysteresis characteristics of a stack type piezoelectric actuator using the hysteresis nonlinearity compensator. Recently, several printing methods that cost less and are faster than previous semiconductor processes have been developed for the production of electric paper and RFID. The system proposed in this study prints by spraying the molten metal, and consists of a nozzle, heating furnace, operating actuator, and an XYZ 3-axis stage. As an operating system, the piezoelectric (PZT) method has very valuable uses. However, the PZT actuator has a hysteresis nonlinearity due to the ferroelectric characteristics of the PZT element. This causes problems in the system position control characteristics and deteriorates the performance of the system. This study proposed an inverse hysteresis model, a mathematic modeling method that can express the geometric relationship between voltage and displacement, in order to reduce the hysteresis of the PZT actuator. In addition, system identification and PID control methods were examined. Also, it was confirmed that the proposed control strategy gives good tracking performance.

Review on the Nonlinear Modeling of Hysteresis in Piezoelectric Ceramic Actuators

“…As shown in Figure 8, y d represents the expected displacement, u is the output voltage of the inverse model and the input voltage of the actuator, and y represents the output displacement of the actuator. In a control system, the inverse model can be used for feedforward compensation [127][128][129][130] or combined with PID and other algorithms for compound control [131][132][133].…”

“…As shown in Figure 8, d y represents the expected displacement, u is the output voltage of the inverse model and the input voltage of the actuator, and y represents the output displacement of the actuator. In a control system, the inverse model can be used for feedforward compensation [127][128][129][130] or combined with PID and other algorithms for compound control [131][132][133]. There are generally two methods for obtaining inverse models: one is to directly take the actuator output displacement data as the model input and the actuator input voltage as the model output during parameter identification so that the identified model can be There are generally two methods for obtaining inverse models: one is to directly take the actuator output displacement data as the model input and the actuator input voltage as the model output during parameter identification so that the identified model can be directly used as the inverse model, such as the PI model based on the Stop operator [57].…”

Low-voltage and high-performance buzzer-scanner based streamlined atomic force microscope system

“…However, the flexural scanner requires precision fabrication and assembly for its piezoelectric stacks and low-noise high-voltage driving electronics, all of which are expensive. In addition, nonlinear characteristics of the piezoelectric elements, such as the creep [12,13] and the hysteresis [14,15] effects, are amplified by the structure. Frequent calibrations or installation of feedback sensors are required for high-quality measurements of the AFM systems.…”

Position Controller for Piezoelectric Actuator

“…Also, the study performed system identification in order to create the optimum condition for the system. As for the identification, the PEM technique was used and a transfer function that has the most similar characteristics to the ones in the study system was obtained [6,7].…”