Journal
ASIAN JOURNAL OF CONTROL
Volume 11, Issue 2, Pages 175-181Publisher
WILEY
DOI: 10.1002/asjc.93
Keywords
Atomic force microscope; feedforward control
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Funding
- Agilent Technologies, Inc.
- US National Science Foundation [CMMI-0700877]
- Miller Institute for Basic Research in Science at the University of California at Berkeley
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We evaluate the performance of two control architectures applied to atomic force microscopes (AFM). Feedback-only control is a natural solution and has been applied widely. Expanding on that, combining feedback controllers with plant-injection feedforward filters has been shown to greatly improve tracking performance in AFMs. Alternatively, performance can also be improved by the use of a closed-loop-injection feedforward filter applied to the reference input before it enters the feedback loop. In this paper, we compare the plant-injection architecture with the closed-loop-injection architecture when used in controlling AFMs. In particular, we provide experimental results demonstrating the closed-loop-injection architecture yields better tracking performance of a raster scan.
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