Non linear simulation codes as MAXFEA are useful tools for assessing
the performances of control systems but for the phase of controller design
linear models are needed.
Tools for the derivation of both rigid and deformable linear models
have been developed. In the simpler approach the plasma is considered as
a set of filaments that shifts rigidly and therefore the deformability
of the plasma is neglected. This approach is usefull for determining the
main stability parameters with resonable approximation but shows poorer
precision with increasing plasma elongation.
A more precise modelling is obtained by deriving linear models consistent
with the Magneto Hydro Magnetic equilibrium equations therefore taking
into account the deformability of the plasma shape. Several techniques
have been proposed in the literature for the derivation of deformable models
but an original method, based on the perturbed equilibrium approach, is
currently beeing developed in order to obtaine a reduction of the computational
cost and an increase in the model reliability.
Related
pubblications
-
M. Cavinato, G. Marchiori, A. Beghi, D. Ciscato, and A. Portone, "ITER
scenario simulations with a non-linear MHD equilibrium code,'' in Proc.
of the 20th Symposium on Fusion Technology (B. Beaumont, P. Libeyre,
B. de Gentile, and G. Tonon, eds.), vol. 1, (Marseille, France), pp. 587-590,
September 1998.
-
M. Cavinato, A. Kavin, V. Lukash, and R. Khayrutdinov, "Non-linear simulations
by numerical Magneto Hydro Dynamics equilibrium codes in ITER-FEAT," submitted
to IEEE Conf. on Control Appl. 2000.
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