Tunneling current analysis over an experimental platform with H∞ control

Irfan Ahmad 1 Alina Voda 1 Gildas Besancon 2, 3 Gabriel Buche 4
1 GIPSA-SLR - SLR
GIPSA-DA - Département Automatique
3 GIPSA-SYSCO - SYSCO
GIPSA-DA - Département Automatique
4 GIPSA-Services - GIPSA-Services
GIPSA-lab - Grenoble Images Parole Signal Automatique
Abstract : Many new problems have emerged working at nanometer scale. The precision of measured signal at such a scale is one of the pivotal requirements in many applications of nanotechnology, and it is highly sensitive to the external disturbances. Tunneling current is a quantum mechanical phenomenon which is of order of nano-amperes and appears when an extremely sharp metallic electrically charged tip is approached at the vicinity of a conductive sample surface (distance between tip apex and sample surface must be less than 1 nm). In this paper, a modern H∞ controller design is analyzed in order to achieve better performances in terms of measurement precision, robustness and disturbance rejection for the considered system of tunneling current and a comparison is performed with conventionally used classical PI control technique. The resulting control scheme is validated over an experimental setup (working at ambient atmosphere), developed in GIPSA-Lab (Grenoble Image Parole Signal Automatique) research center. The corresponding simulation and experimental results with the proposed H∞ control design show improved performances with respect to those obtained with the more conventional PI control technique.
Document type :
Journal articles
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https://hal.archives-ouvertes.fr/hal-00756227
Contributor : Gildas Besancon <>
Submitted on : Thursday, November 22, 2012 - 3:59:14 PM
Last modification on : Thursday, April 4, 2019 - 10:18:04 AM

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  • HAL Id : hal-00756227, version 1

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Irfan Ahmad, Alina Voda, Gildas Besancon, Gabriel Buche. Tunneling current analysis over an experimental platform with H∞ control. Journal Européen des Systèmes Automatisés (JESA), Lavoisier, 2012, 4-5, pp.507-534. ⟨hal-00756227⟩

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