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It is sometimes incorrectly assumed that, because superconducting tokamaks already have significant intrinsic or imposed sources of control delay, introducing extra delays/lags into the axisymmetric control loops will have negligible detrimental impact on the plasma control. This study exposes and quantifies the detrimental effects imposed by time delays/lags in the control loop in superconducting...
When designing the control loops for tokamaks, it is important to acknowledge the effects of time delays. An assumption sometimes made for tokamaks having superconducting coils is that these extra time delays will not have any undesirable effects on control. In fact, introducing extra delays into the axisymmetric control loops of certain superconducting tokamaks can have significant detrimental consequences...
The iterative learning control (ILC) technique is extended to distributed parameter systems governed by parabolic partial differential equations (PDEs). ILC arises as an effective method to approach constrained optimization problems in PDE systems. We discuss both P-type and D-type ILC schemes for a distributed parameter system formulated as a general linear system Sigma(A,B,C,D) on a Hilbert space,...
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