Title :
Extremum-seeking-based fluctuation mitigation by E×B actuation in HELCAT
Author :
Wang, Qiaoqiao ; Schuster, Eugenio ; Gilmore, Mark ; Xie, Shuangwei ; Ware, Andrew
Author_Institution :
Dept. of Mech. Eng. & Mech., Lehigh Univ., Bethlehem, PA, USA
Abstract :
We investigate active control of fluctuations via manipulation of flow profiles in a magnetized laboratory plasma device (HELCAT). Fluctuations and particle transport are monitored by electrostatic probes, and E×B flow profiles controlled via biased ring electrodes. A non-model-based optimization algorithm is implemented to seek control inputs that minimize a cost function related to the fluctuation amplitude. The algorithm is also able to identify radial poloidal flow profiles associated with specific levels of RMS fluctuations.
Keywords :
flow control; minimisation; plasma devices; plasma fluctuations; plasma magnetohydrodynamics; plasma probes; plasma transport processes; ExB actuation; HELCAT; RMS fluctuations; active control; biased ring electrodes; cost function minimization; electrostatic probes; extremum seeking based fluctuation mitigation; flow profile control; flow profile manipulation; fluctuation amplitude; magnetized laboratory plasma device; nonmodel based optimization algorithm; particle transport; Cost function; Equations; Mathematical model; Plasma devices; Plasma measurements; Probes;
Conference_Titel :
Control Applications (CCA), 2011 IEEE International Conference on
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4577-1062-9
Electronic_ISBN :
978-1-4577-1061-2
DOI :
10.1109/CCA.2011.6044378
