Poloidal flux profile reconstruction from pointwise measurements via extended Kalman filtering in the DIII-D Tokamak
- Lehigh Univ., Bethlehem, PA (United States)
The accuracy of the internal states of a tokamak, which usually cannot be measured directly, is of crucial importance for feedback control of the plasma dynamics. A first-principles-driven plasma response model could provide an estimation of the internal states given the boundary conditions on the magnetic axis and at plasma boundary. However, the estimation would highly depend on initial conditions, which may not always be known, disturbances, and non-modeled dynamics. Here in this work, a closed-loop state observer for the poloidal magnetic flux is proposed based on a very limited set of real-time measurements by following an Extended Kalman Filtering (EKF) approach. Comparisons between estimated and measured magnetic flux profiles are carried out for several discharges in the DIII-D tokamak. The experimental results illustrate the capability of the proposed observer in dealing with incorrect initial conditions and measurement noise.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FC02-04ER54698
- OSTI ID:
- 1378451
- Journal Information:
- IEEE Conference on Control Applications, Conference: 2015 IEEE Conference on Control Applications (CCA), Sydney, NSW (Australia), 21-23 Sep 2015; ISSN 1085-1992
- Publisher:
- IEEECopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Estimation of plasma properties using an extended Kalman filter with plasma global models
Comparison of measured impurity poloidal rotation in DIII-D with neoclassical predictions under low toroidal field conditions