Mathematical model and characteristic analysis of hybrid photovoltaic/piezoelectric actuation mechanism

Abstract

Photovoltaic materials can turn light energy into electric energy directly, and thus have the advantages of high electrical output voltages and the ability to realize remote or non-contact control. When high-energy ultraviolet light illuminates polarized PbLaZrTi (PLZT) materials, high photovoltages will be generated along the spontaneous polarization direction due to the photovoltaic effect. In this paper, a novel hybrid photovoltaic/piezoelectric actuation mechanism is proposed. PLZT ceramics are used as a photovoltaic generator to drive a piezoelectric actuator. A mathematical model is established to define the time history of the actuation voltage between two electrodes of the piezoelectric actuator, which is experimentally validated by the test results of a piezoelectric actuator with different geometrical parameters under irradiation at different light intensities. Some important characteristics of this novel actuation mechanism are analyzed and it can be concluded that (1) it is experimentally validated that there is no hysteresis between voltage and deformation which exists in a PLZT actuator; (2) the saturated voltage and response speed can be improved by using a multi-patch PLZT generator to drive the piezoelectric actuator; and (3) the initial voltage of the piezoelectric actuator can be acquired by controlling the logical switch between the PLZT and the piezoelectric actuator while the initial voltages increase with the rise of light intensity.

RETRACTED: A Closed-Loop Control Mathematical Model for Photovoltaic-Electrostatic Hybrid Actuator with a Slant Lower Electrode Based on PLZT Ceramic

“…Huang et al [11] proposed a mathematical model of PLZT ceramic with coupled multi-physics fields, and it can explain the hysteresis phenomenon and the variation trend of the photo-induced voltage very well. To remedy the hysteresis phenomenon of PLZT ceramic actuator, Jiang and Wang et al [12,13] studied a novel hybrid photovoltaic-piezoelectric actuation mechanism and Liu et al [14] investigated on influence factors of opto-electrostatic hybrid driving torsion actuator based on PLZT ceramic. Wang et al [15] studied the closed-loop control of the photovoltage of PLZT ceramic.…”

A self-adaption compensation control for hysteresis nonlinearity in piezo-actuated stages based on Pi-sigma fuzzy neural network

“…Piezo-actuated stages have become a key high-precision driving mechanism due to their advantages of fast response, high stiffness, and high actuating force [1,2]. However, the inherent hysteresis in piezo-actuated stages significantly hinders their application in the field of micro-positioning system [3,4]. The hysteresis nonlinearity in piezo-actuated stages has a special property, which is related with both the current input and history input.…”

An ON-OFF Closed-Loop Control of Photoelectric Actuator Based on PLZT Ceramic

“…The SOFSMC method was used by He et al [15] to reduce the multimodal vibration of the new photoelectric laminated cylindrical shell with the multi-chip actuating structure as well as the inherent flutter of the conventional control. Jiang et al [16] designed a logical switch between the PLZT generator and the piezoelectric actuator to acquire the initial voltage of the piezoelectric actuator. PLZT ceramic was made as actuators by Gou X. and Liu B.…”