Study of PLZT/PVDF hybrid drive method for flexible structure shape control

According to the design requirements of large caliber, light mass and longevity, the mass of surface accuracy adjusting devices for space shell reflectors needs to be strictly controlled. As a result, new methods for achieving space energy transformation need to be explored. This paper presents a PLZT/PVDF hybrid drive method for flexible structure shape accuracy non-contact control: using the PLZT photovoltage, which is controlled by the ultraviolet, to activate the PVDF attached on the flexible structure surface, and accomplishes adjusting and controlling the structure's shape. The paper firstly builds up the electrical model of PLZT/PVDF hybrid drive, and deduces the constitutive relation of this hybrid drive. Then actuation equations of the PVDF bonded cantilever beam are provided and influence factors of the shape control are analyzed. Lastly, a PLZT/PVDF hybrid drive experiment platform is built up for testing the PLZT photovoltage and the ability of the PVDF driven by the PLZT to deflect the cantilever beam. Experiment data validate the feasibility of the hybrid drive and its constitutive relation.