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"Fuzzy Logic Application to Troidal Plasma Contol "
Date of publication:
plasma control, fuzzy control, PID control, magnetic configuration, helical system, LHD
The fuzzy logic control is applied to toroidal plasmas, especially the plasma current control of the Large Helical Device(LHD) plasma, and the comparisons between fuzzy and PID methods are carried out. In the LHD system, 3-pair polidal coils are utilized for the control of plasma position, shaping and current by means of a hybrid control scheme, which is applicable to the tokamak control system. The fuzzy control leads to the better controllability due to its non-linear feedback properties than the PID scheme, and gives rise to about 10% reduction of the required voltages of coils and power supplies. Moreover, flexible modifications for adding various feedback constraints can be performed using fuzzy control schemes.
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