Plasma Vertical Stabilization in Presence of Coil Voltage Saturation in the DIII-D Tokamak

E. Schuster, M.L. Walker, D.A. Humphreys and M. Krstic

American Control Conference

Denver, CO, USA, June 2003

Abstract

An anti-windup compensator is implemented for a given nominal plasma vertical controller guaranteeing global vertical stabilization of the plasma in the presence of actuactor saturation for all reference commands. The anti-windup synthesis problem is to find a nonlinear modification of the nominal linear controller that prevents vertical instability and undesirable oscillations but leaves the nominal closed loop unmodified when there is no input saturation.