TY - GEN
T1 - Maximum Likelihood Estimation of diffusion and convection in tokamaks using infinite domains
AU - van Berkel, Matthijs
AU - Vandersteen, Gerd
AU - Zwart, Hans
AU - Hogeweij, Dick
AU - De Baar, Marco
PY - 2013/1/1
Y1 - 2013/1/1
N2 - A new method to identify the spatial dependent parameters describing the heat transport, i.e. diffusion and convection, in fusion reactors is presented. These parameters determine the performance of fusion reactors. The method is based on local transfer functions, which are defined between two measurement locations. Estimation of the local transfer functions results in a model of the spatial dependent diffusion and convection. The parameters of the local transfer functions are estimated using Maximum Likelihood Estimation in the frequency domain. This is necessary, because both measurements (input and output of the transfer function) contain noise. Moreover, confidence bounds and validation tests can be used in this framework. Finally, experimental results are presented, which show that the diffusion and convection can be estimated. In this case, the uncertainty bounds are too large on the convection to conclude its presence.
AB - A new method to identify the spatial dependent parameters describing the heat transport, i.e. diffusion and convection, in fusion reactors is presented. These parameters determine the performance of fusion reactors. The method is based on local transfer functions, which are defined between two measurement locations. Estimation of the local transfer functions results in a model of the spatial dependent diffusion and convection. The parameters of the local transfer functions are estimated using Maximum Likelihood Estimation in the frequency domain. This is necessary, because both measurements (input and output of the transfer function) contain noise. Moreover, confidence bounds and validation tests can be used in this framework. Finally, experimental results are presented, which show that the diffusion and convection can be estimated. In this case, the uncertainty bounds are too large on the convection to conclude its presence.
UR - http://www.scopus.com/inward/record.url?scp=84902258527&partnerID=8YFLogxK
U2 - 10.1109/CCA.2013.6662920
DO - 10.1109/CCA.2013.6662920
M3 - Conference contribution
AN - SCOPUS:84902258527
T3 - IEEE International Conference on Control Applications
SP - 1230
EP - 1234
BT - 2013 IEEE International Conference on Control Applications, CCA 2013
PB - IEEE
CY - Piscataway, NJ
T2 - 2013 IEEE International Conference on Control Applications, CCA 2013
Y2 - 28 August 2013 through 30 August 2013
ER -