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Gray-box modeling of resistive wall modes with vacuum-plasma separation and optimal control design for EXTRAP T2R
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-5259-0458
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2017 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 121, p. 245-255Article in journal (Refereed) Published
Abstract [en]

This paper presents a graybox methodology to model the resistive wall mode instability by combining first principle approach and system identification technique. In particular we propose a separate vacuum and plasma modeling with cascade interconnection. The shell is modeled using CARIDDI code which solves the 3D integral formulation of eddy current problem, whereas the plasma response is obtained empirically by system identification. Furthermore the resulting model is used to design an optimal feedback control. The model and feedback control is validated experimentally in EXTRAP T2R reversed-field pinch, where RWMs stabilization and non-axisymmetric mode sustainment is considered. 

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2017. Vol. 121, p. 245-255
Keyword [en]
Resistive wall mode, Reversed-field pinch, CARIDDI, System identification, Optimal feedback control
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-215807DOI: 10.1016/j.fusengdes.2017.07.011ISI: 000411550100034Scopus ID: 2-s2.0-85027698362OAI: oai:DiVA.org:kth-215807DiVA, id: diva2:1150225
Note

QC 20171018

Available from: 2017-10-18 Created: 2017-10-18 Last updated: 2017-10-18Bibliographically approved

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Brunsell, Per R.Frassinetti, Lorenzo

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