A super-twisting observer for atomic-force reconstruction in a probe microscope
| Autor: | Stuart C Burgess, Robert L. Harniman, Christopher Edwards, Toshiaki Hatano, Massimo Antognozzi, Guido Herrmann, Mervyn J Miles, Said Ghani Khan, Thang Nguyen, Kaiqiang Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
0209 industrial biotechnology Cantilever Microscope Applied Mathematics Acoustics 020208 electrical & electronic engineering Shear force sliding mode control 02 engineering and technology Sliding mode control elastic and dissipative force shear force Computer Science Applications law.invention 020901 industrial engineering & automation probe microscope Control and Systems Engineering Deflection (engineering) law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Confined water super-twisting observer |
| Zdroj: | Zhang, K, Hatano, T, Nguyen, T, Edwards, C, Herrmann, G, Burgess, S, Antognozzi, M, Khan, S, Harniman, R & Miles, M 2020, ' A super-twisting observer for atomic-force reconstruction in a probe microscope ', Control Engineering Practice, vol. 94, 104191 . https://doi.org/10.1016/j.conengprac.2019.104191 Zhang, K, Hatano, T, Tien Nguyen, T, Edwards, C, Herrmann, G, Burgess, S, Antognozzi, M, Khan, S, Harniman, R & Miles, M 2020, ' A super-twisting observer for atomic-force reconstruction in a probe microscope ', Control Engineering Practice, vol. 94, 104191 . https://doi.org/10.1016/j.conengprac.2019.104191 |
| DOI: | 10.1016/j.conengprac.2019.104191 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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