Antognozzi, Massimo

Burgess, Stuart C

Edwards, Christopher

Harniman, Robert L

Herrmann, Guido

Khan, Said G

Miles, Mervyn J

Nguyen Tien, Thang

Picco, Loren M

This paper concerns the application of a sliding mode observer to the problem of estimation of the shear force affecting the cantilever dynamics of a Transverse Dynamic Force Microscope (TDFM). The oscillated cantilever in proximity to a specimen permits the investigation of the specimen topography at nano-metre precision. The oscillation amplitude, but also in particular the shear forces, are a measure of distance to the specimen, and therefore the estimation of the shear force is of significance when attempting to construct TDFM images at submolecular accuracy. For estimation of the shear forces, an approximate model of the cantilever is derived using the method of lines. Model order reduction and sliding mode techniques are employed to reconstruct the unknown shear force affecting the cantilever dynamics based on only tip position measurements. Simulations are presented to illustrate the proposed scheme, which is to be implemented on the TDFM set up at the Centre for NSQI at Bristol

The University of Manchester - Institutional Repository

Estimation of the Shear Force in Transverse Dynamic Force Microscopy Using a Sliding Mode Observer

null Thang Nguyen

Said G. Khan

Christopher Edwards

Guido Herrmann

Loren Picco

Robert Harniman

Stuart C. Burgess

Massimo Antognozzi

Mervyn Miles

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Estimation of the shear force in Transverse Dynamic Force Microscopy using a sliding mode observer

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https://research-information.bris.ac.uk/files/78948251/ACC2013_cantilever_library.pdf

Estimation of the Shear Force in Transverse Dynamic Force Microscopy Using a Sliding Mode Observer

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The University of Manchester - Institutional Repository

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