Implementation of an Anti-Windup Scheme for Vertical Controllability in the DIII-D Tokamak

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

Symposium on Fusion Engineering

San Diego, California, USA, October 2003

Abstract

An anti-windup compensator is designed for a given predesigned nominal plasma vertical position 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 controller that prevents vertical instability and undesirable oscillations but leaves the nominal closed loop unmodified when there is no input saturation. Design and performance simulations are complete. The different implementation stages, already in process, are described.