NDLI: Estimation of tip-sample interaction in tapping mode AFM using a neural-network approach

Content Provider	IEEE Xplore Digital Library
Author	Toghraee, A. Bristow, D.A. Balakrishnan, S.N.
Copyright Year	2012
Description	Author affiliation: Dept. of Mech. & Aerosp. Eng, Missouri Univ. of Sci. & Technol., Rolla, MO, USA (Toghraee, A.; Bristow, D.A.; Balakrishnan, S.N.)
Abstract	In Atomic Force Microscopy, the tip-sample interaction force contains information about the sample topology, material properties and tip geometry. However, quantitative measurement of the time-varying tip-sample interaction forcing function is challenging in the tapping mode because of the combined dynamic complexities of the cantilever and nonlinear complexity of the tip-sample force. In this paper, an initial investigation of a neural-network approach to tip-sample interaction force estimation is studied. The tip-sample interaction is treated as an unknown position-dependent force on the cantilever. A modified radial basis function neural-network is used in a dynamic observer framework to approximate the unknown forcing function. Design of the observer gains is discussed and simulations are used to demonstrate plausibility of the approach. Accuracy of the force model is evaluated for several different tip-sample distances and materials and future direction are discussed.
Sponsorship	IEEE Control Syst. Soc.
Starting Page	3222
Ending Page	3227
File Size	515531
Page Count	6
File Format	PDF
ISBN	9781457710957
ISSN	07431619
e-ISBN	9781457710964
e-ISBN	9781467321020
DOI	10.1109/ACC.2012.6315133
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-27
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Force Estimation Probes Materials Mathematical model Dynamics Noise measurement
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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