Nonaxisymmetric experimental modal analysis and control of resistive wall MHD in RFPs: System identification and feedback control for the reversed-field pinch
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
The reversed-field pinch (RFP) is a device for magnetic confinement of fusion plasmas. The main objective of fusion plasma research is to realise cost-effective thermonuclear fusion power plants. The RFP is highly unstable as can be explained by the theory of magnetohydrodynamics (MHD). Feed-back control technology appears to enable a robustly stable RFP operation. Experimental control and identification of nonaxisymmetric multimode MHD is pursued in this thesis. It is shown that nonparametric multivariate identification methods can be utilised to estimate MHD spectral characteristics from plant-friendly closed-loop operational input-output data. It is also shown that accurate tracking of the radial magnetic field boundary condition is experimentally possible in the RFP. These results appear generically useful as tools in both control and physics research in magnetic confinement fusion.
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. , ix, 101 p.
Magnetic confinement fusion, Reversed-field pinch, System identification, Magnetohydrodynamics, Modal analysis, Automatic control, Resistive wall modes
Fusion, Plasma and Space Physics Control Engineering Signal Processing
IdentifiersURN: urn:nbn:se:kth:diva-94096ISBN: 978-91-7501-359-6OAI: oai:DiVA.org:kth-94096DiVA: diva2:525301
2012-06-01, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)
Ariola, Marco, Associate Professor
Brunsell, Per, Associate Professor
QC 201205082012-05-082012-05-072013-12-04Bibliographically approved
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