ABSTRACT: Stabilization of the Resistive Wall Mode (RWM) in the NSTX tokamak is important to achieve high-beta plasmas. This paper numerically investigates state-space control algorithms for improved performance of RWM control using the existing six external control coils with off-midplane poloidal magnetic field sensors in NSTX. Experimentally Ã<sub>N</sub> = 5.6 was achieved with the present proportional gain controller. The proposed LQG controller is capable of reaching Ã<sub>N</sub> = 6.7 for slowly rotating plasma modes and the ideal wall limit Ã<sub>N</sub> = 7:06 for plasma modes with higher natural rotation speed.
Decision and Control, 2009 held jointly with the 2009 28th Chinese Control Conference. CDC/CCC 2009. Proceedings of the 48th IEEE Conference on; 01/2010