Title :
Closed-loop MIMO ARX estimation of concurrent external plasma response eigenmodes in magnetic confinement fusion
Author :
Olofsson, Erik ; Rojas, Cristian R. ; Hjalmarsson, Håkan ; Brunsell, Per ; Drake, James R.
Author_Institution :
Sch. of Electr. Eng. (EES), R. Inst. of Technol. (KTH), Stockholm, Sweden
Abstract :
Detailed experimental MIMO models of plasma stability behaviour are becoming increasingly important in magnetic confinement fusion (MCF) energy research as an assortment of magnetohydrodynamic (MHD) instabilities develop when fusion performance is pushed. Some of these problems could perhaps be handled by magnetic feedback. We here show a practical method for experimental closed-loop multi-input multi-output (MIMO) characterisation of the macroscopic stability of toroidal MCF devices. It is demonstrated, by application to the MCF experiment EXTRAP T2R, that MHD eigenmodes can be detected using the workhorse MIMO autoregressive exogeneous (ARX) model structure. Plausibly, the presented methodology could significantly improve highly-desired magnetic feedback accuracy in MCF.
Keywords :
MIMO systems; autoregressive processes; closed loop systems; control engineering computing; feedback; magnetic variables control; physics computing; plasma instability; plasma magnetohydrodynamics; reversed field pinch; signal processing; EXTRAP T2R experiment; MHD eigenmodes; autoregressive exogeneous model; closed-loop MIMO ARX estimation; closed-loop multi-input multi-output characterisation; concurrent external plasma response eigenmodes; magnetic confinement fusion; magnetic feedback; magnetohydrodynamic instabilities; toroidal MCF device macroscopic stability; versed-field pinch; Coils; MIMO; Magnetic resonance; Magnetohydrodynamics; Tokamaks; Toroidal magnetic fields;
Conference_Titel :
Decision and Control (CDC), 2010 49th IEEE Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-7745-6
DOI :
10.1109/CDC.2010.5717656
