Synthesis and operation of an FFT-decoupled fixed-order reversed-field pinch plasma control system based on identification data
2010 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 52, no 10, 104005- p.Article in journal (Refereed) Published
Recent developments and applications of system identification methods for the reversed-field pinch (RFP) machine EXTRAP T2R have yielded plasma response parameters for decoupled dynamics. These data sets are fundamental for a real-time implementable fast Fourier transform (FFT) decoupled discrete-time fixed-order strongly stabilizing synthesis as described in this work. Robustness is assessed over the data set by bootstrap calculation of the sensitivity transfer function worst-case H(infinity)-gain distribution. Output tracking and magnetohydrodynamic mode m = 1 tracking are considered in the same framework simply as two distinct weighted traces of a performance channel output-covariance matrix as derived from the closed-loop discrete-time Lyapunov equation. The behaviour of the resulting multivariable controller is investigated with dedicated T2R experiments.
Place, publisher, year, edition, pages
2010. Vol. 52, no 10, 104005- p.
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-46613DOI: 10.1088/0741-3335/52/10/104005ISI: 000283391000007ScopusID: 2-s2.0-78149271970OAI: oai:DiVA.org:kth-46613DiVA: diva2:455445
QC 201111102011-11-102011-11-042011-11-10Bibliographically approved