Closed-Loop System Identification and Controller Reconfiguration for EXTRAP T2R Reversed-Field Pinch

Author

Olofsson, K. Erik J ; Brunsell, Per R.

Author_Institution

Sch. of Electr. Eng. (EES), R. Inst. of Technol. (KTH), Stockholm, Sweden

Volume

38

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

365

Lastpage

370

Abstract

We first briefly summarize a supposedly efficient novel method for measuring the external plasma response as applied to the inherently unstable reversed-field pinch EXTRAP T2R. Second, the set of parameters estimated with this particular method is harvested and fed as input to a discrete-time fixed-order fast-Fourier-transform-decoupled multi-input-multioutput controller synthesis. The thus reconfigured feedback system is implemented and experimentally tested on the real plant T2R. The recorded first-deployment results are encouraging. The overall methodology followed throughout this paper is emphasized and strongly exemplifies applied process control thinking for the stabilization of magnetically confined toroidal plasmas.

Keywords

fast Fourier transforms; pinch effect; plasma diagnostics; plasma instability; plasma magnetohydrodynamics; EXTRAP T2R reversed-field pinch; closed-loop system identification; controller reconfiguration; discrete-time fixed-order fast-Fourier-transform-decoupled multiinput-multioutput controller synthesis; external plasma response; magnetically confined toroidal plasmas; no-hand-waving MHD control system; reconfigured feedback system; Magnetic confinement fusion; plasma control; system identification;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2009.2038380

Filename

5393047