Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)
- Volume 18 Issue 9
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- Pages.2272-2283
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- 1994
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- 1225-5963(pISSN)
DOI QR Code
Nonlinear Modeling of Piezoelectric Actuators for Scanning Tunneling Microscopy
주사터널링현미경을 위한 압전구동기의 비선형 모델링
Abstract
In scanning tunneling microscopy, the piezoelectric actuator is popuilarly used in stacked type as it can provide remarkable positioning resolution and stiffness. The actuator, however, exhibits a considerable amount of hystereic nonlinearity, resulting in losses of overall measuring accuracy when a linear model is used for its control and calibration, In this study, a nonlinear model is proposed for predicting the precise relationship between the input connand voltage and the output displacement of the actuator itself, cross-coupled electrical behaviours of the driving circuit with the actuator, and mechanical characteristics of the driven components of the actuator. Finally experimental results prove that the nonlinear model enhances the measuring of scanning tunneling microscopy by an order ten in comparison with a conventional linear model.
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