This article studies ultra-high-precision positioning with piezoactuators and illustrates the results with an example Scanning Probe Microscopy (SPM) application. Loss of positioning precision in piezoactuators occurs (1) due to hysteresis during long range applications, (2) due to creep effects when positioning is needed over extended periods of time, and (3) due to induced vibrations during high-speed positioning. This loss in precision restricts the use of piezoactuators in high-speed positioning applications like SPM-based nanofabrication, and ultra-high-precision optical systems. An integrated inversion-based approach is presented in this article to compensate for all three adverse affects—creep, hysteresis, and vibrations. The method is applied to an Atomic Force Microscope (AFM) and experimental results are presented that demonstrate substantial improvements in positioning precision and operating speed.
Creep, Hysteresis, and Vibration Compensation for Piezoactuators: Atomic Force Microscopy Application
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division November 19, 1999. Associate Editor: T. Kurfess.
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Croft, D., Shed, G., and Devasia, S. (November 19, 1999). "Creep, Hysteresis, and Vibration Compensation for Piezoactuators: Atomic Force Microscopy Application ." ASME. J. Dyn. Sys., Meas., Control. March 2001; 123(1): 35–43. https://doi.org/10.1115/1.1341197
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