A super-twisting observer for atomic-force reconstruction in a probe microscope

Kaiqiang Zhang; Toshiaki Hatano; Thang Tien Nguyen; Christopher Edwards; Guido Herrmann; Stuart Burgess; Massimo Antognozzi; Said Khan; Robert Harniman; Mervyn Miles

doi:10.1016/j.conengprac.2019.104191

A super-twisting observer for atomic-force reconstruction in a probe microscope

Kaiqiang Zhang, Toshiaki Hatano, Thang Tien Nguyen, Christopher Edwards, Guido Herrmann, Stuart Burgess, Massimo Antognozzi, Said Khan, Robert Harniman, Mervyn Miles

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Abstract

This paper presents a new methodology employing a super-twisting sliding mode observer to reconstruct un-measureable atomic-forces at nano-Newton precision in a Vertically Oriented Probe Microscope (VOPM). The VOPM senses the deﬂection of a vertically oriented cantilever, caused by shear-force interaction with a conﬁned water layer above the sample-substrate. The paper describes the development of a model and the subsequent experimental process for computing its parameters. This forms the basis for the design of a super-twisting observer to estimate the unknown shear-forces. The reconstructed force can be decomposed into elastic and viscous components, which are important in biological research

Original language	English
Article number	104191
Number of pages	12
Journal	Control Engineering Practice
Volume	94
Early online date	15 Nov 2019
DOIs	https://doi.org/10.1016/j.conengprac.2019.104191
Publication status	Published - 1 Jan 2020

Keywords

Probe Microscope
Shear Force
Elastic and Dissipative Force
Sliding Mode Control
Super-Twisting Observer

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10.1016/j.conengprac.2019.104191

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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S096706611930173X#! . Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 2.7 MBLicence: CC BY-NC-ND

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title = "A super-twisting observer for atomic-force reconstruction in a probe microscope",

abstract = "This paper presents a new methodology employing a super-twisting sliding mode observer to reconstruct un-measureable atomic-forces at nano-Newton precision in a Vertically Oriented Probe Microscope (VOPM). The VOPM senses the deﬂection of a vertically oriented cantilever, caused by shear-force interaction with a conﬁned water layer above the sample-substrate. The paper describes the development of a model and the subsequent experimental process for computing its parameters. This forms the basis for the design of a super-twisting observer to estimate the unknown shear-forces. The reconstructed force can be decomposed into elastic and viscous components, which are important in biological research",

keywords = "Probe Microscope, Shear Force, Elastic and Dissipative Force, Sliding Mode Control, Super-Twisting Observer",

author = "Kaiqiang Zhang and Toshiaki Hatano and {Tien Nguyen}, Thang and Christopher Edwards and Guido Herrmann and Stuart Burgess and Massimo Antognozzi and Said Khan and Robert Harniman and Mervyn Miles",

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AU - Zhang, Kaiqiang

AU - Hatano, Toshiaki

AU - Tien Nguyen, Thang

AU - Edwards, Christopher

AU - Herrmann, Guido

AU - Burgess, Stuart

AU - Antognozzi, Massimo

AU - Khan, Said

AU - Harniman, Robert

AU - Miles, Mervyn

PY - 2020/1/1

Y1 - 2020/1/1

N2 - This paper presents a new methodology employing a super-twisting sliding mode observer to reconstruct un-measureable atomic-forces at nano-Newton precision in a Vertically Oriented Probe Microscope (VOPM). The VOPM senses the deﬂection of a vertically oriented cantilever, caused by shear-force interaction with a conﬁned water layer above the sample-substrate. The paper describes the development of a model and the subsequent experimental process for computing its parameters. This forms the basis for the design of a super-twisting observer to estimate the unknown shear-forces. The reconstructed force can be decomposed into elastic and viscous components, which are important in biological research

AB - This paper presents a new methodology employing a super-twisting sliding mode observer to reconstruct un-measureable atomic-forces at nano-Newton precision in a Vertically Oriented Probe Microscope (VOPM). The VOPM senses the deﬂection of a vertically oriented cantilever, caused by shear-force interaction with a conﬁned water layer above the sample-substrate. The paper describes the development of a model and the subsequent experimental process for computing its parameters. This forms the basis for the design of a super-twisting observer to estimate the unknown shear-forces. The reconstructed force can be decomposed into elastic and viscous components, which are important in biological research

KW - Probe Microscope

KW - Shear Force

KW - Elastic and Dissipative Force

KW - Sliding Mode Control

KW - Super-Twisting Observer

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DO - 10.1016/j.conengprac.2019.104191

M3 - Article (Academic Journal)

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VL - 94

JO - Control Engineering Practice

JF - Control Engineering Practice

M1 - 104191

ER -

A super-twisting observer for atomic-force reconstruction in a probe microscope

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