A piezoelectrically driven micropositioning table with high stiffness and resolution was presented. A flexure hinge mechanism was utilized to guide the moving part and to provide preload for the piezoelectric actuators. The lever amplifiers were used to enlarge the working range of the moving platform. The static and dynamic characteristics of the micropositioning table was investigated and its dynamic model was established for consideration of the driving circuit. From the experimental data
it is shows that the piezoelectrically driven micro-positioning table has a resolution of 5 nm and natural frequencies up to 143 Hz and 180 Hz
respectively
which indicates that the table is useful for nanometer level positioning applications.
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references
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