Session GP9: Poster Session III: Laser and Beam-Driven Acceleration; DIII-D Tokamak I; General Tokamak; Field Reversed Configurations and Spheromaks; Mini-Conference: Integrated, Multiphysics, High-Performance Computations for Magnetic Fusion Research
9:30 AM–9:30 AM, Tuesday, November 9, 2010
Room: Riverside West
Abstract ID: BAPS.2010.DPP.GP9.57
Abstract: GP9.00057 : Tracking of Current and Rotation Profile Evolution in the \hbox{DIII-D} Tokamak via System Identification
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Abstract 
Authors:
W.P. Wehner
(Lehigh University)
C. Xu
(Lehigh University)
E. Schuster
(Lehigh University)
M.L. Walker
(General Atomics)
D.A. Humphreys
(General Atomics)
Y. In
(FarTech, Inc.)
Transport theories produce nonlinear models based on partial differential equations (PDEs) whose complexity often renders them difficult to use for control design. As an alternative, data-driven modeling techniques involving system identification have the potential to obtain practical, low-complexity, dynamic models for the control of plasma systems. The plasma dynamics is first assumed to be governed by a tractable model with unknown and to-be-estimated transport coefficients. After discretizing both in space and time, the system states and to-be-estimated coefficients are combined into an augmented state vector. The resulting nonlinear state-space model is used for the design of an extended Kalman filter that provides real-time estimates not only of the system states but also of the unknown transport coefficients required by the current and rotation feedback controllers.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DPP.GP9.57