Backstepping Control of the Plasma Current Profile in the DIII-D Tokamak

被引：0

作者：

Boyer, Mark D. ^{[1
]}

Barton, Justin ^{[1
]}

Schuster, Eugenio ^{[1
]}

Luce, Tim C. ^{[2
]}

Ferron, John R. ^{[2
]}

Walker, Michael L. ^{[2
]}

Humphreys, David A. ^{[2
]}

Penaflor, Ben G. ^{[2
]}

Johnson, Robert D. ^{[2
]}

机构：

[1] Lehigh Univ, Dept Mech Engn & Mech, Bethlehem, PA 18015 USA

[2] General Atom, San Diego, CA 92121 USA

来源：

2012 AMERICAN CONTROL CONFERENCE (ACC) | 2012年

基金：

美国国家科学基金会;

关键词：

REAL-TIME CONTROL; FEEDBACK-CONTROL; JET;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Control of the spatial profile of plasma current in tokamak plasmas has been demonstrated to be a key condition for achieving advanced scenarios with improved confinement and possible steady-state operation. The dynamics of the current profile are nonlinear and coupled with several other plasma parameters, motivating the design of model-based controllers that can account for these complexities. In this work, we consider a control-oriented model of the current profile evolution in DIII-D and the problem of regulating the current profile around a desired feed-forward trajectory. In open-loop, the response of the system to disturbances and perturbed initial conditions may be undesirable. To improve the performance of the system, the PDE model is discretized in space using a finite difference method and a backstepping design is applied to obtain a discrete transformation from the original system into an asymptotically stable target system with desirable properties. Through a nonlinear transformation, the resulting boundary control law utilizes the total plasma current, total power, and line averaged density as actuators. A Simserver simulation study is done to test the controller's performance and its implementation in the DIII-D plasma control system. Finally, experimental results showing the ability of the controller to reject input disturbances and perturbations in initial conditions are presented.

引用

页码：2996 / 3001

页数：6

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