New Identification Approach and Methods for Plasma Equilibrium Reconstruction in D-Shaped Tokamaks

Mitrishkin, Y.V.; Korenev, P.S.; Konkov, A.E.; Kruzhkov, V.I.; Ovsyannikov, N.E.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.

Авторы: Mitrishkin Yuri V., Korenev Pavel S., Konkov Artem E., Kruzhkov Valerii I., Ovsyannikov Nicolai E.
Журнал: Mathematics
Том: 10
Номер: 1
Год издания: 2022
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 1
Последняя страница: 23
Номер статьи: 40
DOI: 10.3390/math10010040
Аннотация: The paper deals with the identification of plasma equilibrium reconstruction in D-shaped tokamaks on the base of plasma external magnetic measurements. The methods of such identification are directed to increase their speed of response when plasma discharges are relatively short, like in the spherical Globus-M2 tokamak (Ioffe Inst., St. Petersburg, Russia). The new approach is first to apply to the plasma discharges data the off-line equilibrium reconstruction algorithm based on the Picard iterations, and obtain the gaps between the plasma boundary and the first wall, and the second is to apply new identification methods to the gap values, producing plasma shape models operating in real time. The inputs for on-line robust identification algorithms are the measurements of magnetic fluxes on magnetic loops, plasma current, and currents in the poloidal field coils measured by the Rogowski loops. The novel on-line high-performance identification algorithms are designed on the base of (i) full-order observer synthesized by linear matrix inequality (LMI) methodology, (ii) static matrix obtained by the least square technique, and (iii) deep neural network. The robust observer is constructed on the base of the LPV plant models which have the novelty that the state vector contains the gaps which are estimated by the observer, using input and output signals. The results of the simulation of the identification systems on the base of experimental data of the Globus-M2 tokamak are presented.
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New Identification Approach and Methods for Plasma Equilibrium Reconstruction in D-Shaped Tokamaksстатья

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