摘要
Deformation of a simple single piezoelectric actuator is usually quite small.A ring-shaped piezoelectric actuator with large piezoelectrically generated displacement was proposed.The thickness of the actuator was1 mm,and the inner and outer diameters were 4 mm and 40 mm,respectively.The ring-shaped actuator was made of BiScO_3-PbTiO_3(BS-PT)ceramic and polarized in radial direction.An electric field was applied to thickness direction and a large shear-bending deformation emerged.Then Rayleigh-Ritz method and Bessel functions were adopted to analyze the shear-bending deformation.Results show that under an electric field of 7.5kV/cm,the maximum displacement at the inner edge of the actuator reached 5.07μm,which agreed well with the corresponding experimental results.
Deformation of a simple single piezoelectric actuator is usually quite small. A ring shaped piezoelectric actuator with large piezoelectrically generated displacement was proposed. The thickness of the actuator was 1 mm, and the inner and outer diameters were 4 mm and 40 ram, respectively. The ring-shaped actuator was made of BiScOa-PbTiOa (BS-PT) ceramic and polarized in radial direction. An electric field was applied to thick ness direction and a large shear-bending deformation emerged. Then Rayleigh-Ritz method and Bessel functions were adopted to analyze the shea〉bending deformation. Results show that under an electric field of 7.5 kV/cm, the maximum displacement at the inner edge of the actuator reached 5.07 μm, which agreed well with the corresponding experimental results.
基金
supported by the National Natural Science Foundation of China(No.11172138)