Adaptive stochastic output feedback control of resistive wall modes in tokamaks
- Electrical Engineering Department, Columbia University, New York, New York 10027 (United States)
An adaptive optimal stochastic output feedback control is developed to stabilize the resistive wall mode (RWM) instability in tokamaks. The system dynamics is experimentally determined via the extended least square method with an exponential forgetting factor and covariance resetting. The optimal output feedback controller is redesigned online periodically based on the system identification. The output measurements and past control inputs are used to construct new control inputs. The adaptive output controller can stabilize the time dependent RWM in a slowly evolving tokamak discharge. This is accomplished within a time delay of roughly three times the inverse of the growth rate. The design procedure is simpler and the computation time is shorter than the state feedback method reported earlier in Sun, Sen, and Longman [Phys. Plasmas13, 012512 (2006)].
- OSTI ID:
- 20860249
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 13; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Adaptive optimal stochastic state feedback control of resistive wall modes in tokamaks
Modeling of the Feedback Stabilization of the Resistive Wall Modes in a Tokamak
A simple toroidal shell model for the study of feedback stabilization of resistive wall modes in a tokamak plasma
Journal Article
·
Sat Jan 14 23:00:00 EST 2006
· Physics of Plasmas
·
OSTI ID:20782454
Modeling of the Feedback Stabilization of the Resistive Wall Modes in a Tokamak
Journal Article
·
Sun Nov 14 23:00:00 EST 2004
· Plasma Physics Reports
·
OSTI ID:20717468
A simple toroidal shell model for the study of feedback stabilization of resistive wall modes in a tokamak plasma
Journal Article
·
Thu Feb 14 23:00:00 EST 2008
· Physics of Plasmas
·
OSTI ID:21103815