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Título del libro: 16th Latin American Workshop On Plasma Physics, Lawpp 2017 - Conference Proceedings
Título del capítulo: Burn control of an ITER-fuzzy Sair Garcia

Autores UNAM:
JULIO JAVIER MARTINELL BENITO;
Autores externos:

Idioma:
Inglés
Año de publicación:
2019
Palabras clave:

Control systems; Controllers; Fuzzy control; Fuzzy neural networks; Membership functions; Nuclear reactors; Temperature control; Wave plasma interactions; Auxiliary heating; Control parameters; Dynamical response; Energy confinement; Fuzzy logic controllers; Parameter deviations; Particle fraction; Plasma temperature; Fuzzy logic


Resumen:

The fuel burn in a fusion reactor has to be kept at a nearly constant rate in order to have a steady power exhaust. Here, we develop a control system based on a fuzzy logic controller in order to adjust external parameters to keep the plasma temperature and density at the design values of a reactor of the characteristics of ITER. The control parameters chosen are the D-T refueling rate, the auxiliary heating power and a neutral helium beam. We use a fuzzy controller of the Mamdani type that uses a number of membership functions appropriate to produce a response to parameter deviations that minimizes the response time. The inference rules are determined in a way to provide stabilization to all perturbations of the temperature, density and alpha particle fraction. The dynamical response of the reactor is simulated with a zero-dimentional model that uses confinement times provided by the ITER scaling. We show how the system is feedback stabilized for a large range of parameters around the nominal values. The recovery time after a perturbation from the steady state is within the order of one second even with a noise term added to the energy confinement time. Furthermore the results of this Fuzzy Control System are compared with another control system based on neural networks that was previously developed. © 2017 IEEE.


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