Modelling and experiments of PLZT/PVDF hybrid drive method for non-contact shape adjustment

Abstract

In order to improve the technical specifications of space reflectors, antennas and other payloads on Earth observation, space communication, deep space exploration and other fields of space applications, people urgently need to enhance the surface shape control accuracy of these large complex curvature flexible structures. Based on the photovoltaic effect and converse piezoelectric effect, this paper presents a non-contact shape-adjusting method which adopts a new space energy conversion: using the PLZT photovoltage, which is controlled by the ultraviolet, to activate the PVDF attached on the flexible structure surface, and adjust and control the structure's shape. This paper firstly built up the electric model of the PLZT/PVDF hybrid drive, derived the constitutive relation of light-electric-mechanical energy field conversion, and determined the key parameters in mathematical model by principle experiments. Then, taking a flexible cantilever beam as the control object, actuation equation of the PVDF bonded structure was built, and actuation properties and influence factors of the cantilever beam actuated by the PLZT/PVDF hybrid drive were simulated and analyzed. After that, the hybrid drive experiment system was built up, and deflecting effect of using ultraviolet illuminated PLZT to actuate PVDF bonded cantilever beam was tested, whose result verified the validity of theoretical modeling and simulation analysis. Lastly, characteristics of the hybrid drive method and conventional PVDF driving were compared, and space application direction of this method was pointed out.

Closed-loop photovoltage control of lead lanthanum zirconate titanate ceramic for photovoltaic-electrostatic-driven servo system

“…Poosanaas-Burke et al (2000) pointed out that the optical second-order nonlinear effect mainly leads to the photovoltaic electric field using the voltage source model, and then proposed a mathematical model without time parameter. Based on the above-mentioned constitutive equations, many scholars have researched the active vibration control and shape of photostrictive laminated flexible structures (Rahman and Nawaz, 2011; Zheng, 2012), beams (Sun and Tong, 2008; Yue et al, 2014; Zheng et al, 2014), plates (Luo and Tong, 2011), and shells (He and Zheng, 2014; Jiang et al, 2013; Shih et al, 2004, 2009; Wang et al, 2011). However, the response of photodeformation is far slower than the photovoltage, which was experimentally discovered by Saitoh and Kametani (1996) and also investigated by Huang et al (2015b).…”

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

“…Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. [16,17]. It was proven by these studies that the novel actuation mechanism possesses a great potential application in the vibration control and shape control of shell structures and other micro actuation fields, while only a rough mathematical model was established, in which the coupling mechanisms of multiphysics fields and the equivalent resistance of piezoelectric actuator were not taken into consideration.…”

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

“…Over the past years, scholars have investigated indepth studies focusing on the practical application of PLZT ceramic in microdrive area. Yue et al [2] proposed a PLZT/PVDF hybrid drive contactless shape adjustment method and proved its effectiveness in cantilever beam deformation control. The high-performance transparent PLZT ceramic fiber made by Chen [3] can be used to manufacture high-frequency ultrasonic transducers and apply in the field of imaging.…”