A discrete adaptive near-time optimum control for the plasma vertical position in a Tokamak

Author

Scibile, Luigi ; Kouvaritakis, Basil

Author_Institution

CERN, Geneva, Switzerland

Volume

9

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

148

Lastpage

162

Abstract

A nonlinear controller for the plasma vertical position in a Tokamak, based on a discrete-time adaptive near time optimum control algorithm (DANTOC) is designed to stabilize the system and to maximize the state-space region over which stability can be guaranteed. The controller is also robust to the edge localized modes (ELMs) and the 600 Hz noise from the thyristor power supplies that are the primary source of disturbances and measurement noise. The controller is tested in simulation for the JET Tokamak and the results confirm its efficacy in controlling the vertical position for different plasma configurations. The controller is also tested experimentally on a real Tokamak, COMPASS-D, and the results demonstrate the improvement with respect to a simple linear PD controller in the presence of disturbances and measurement noise. The emphasis of the is on the development of the design methodology

Keywords

Tokamak devices; adaptive control; control system synthesis; discrete systems; optimal control; position control; robust control; COMPASS-D; JET Tokamak; design methodology; discrete adaptive near-time optimum control; edge localized modes; linear PD controller; nonlinear controller; plasma vertical position; Adaptive control; Control systems; Noise measurement; Nonlinear control systems; Plasma measurements; Plasma simulation; Plasma stability; Programmable control; Testing; Tokamaks;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/87.896756

Filename

896756