System-Engineering approach for the ITER PCS design: The correction coils current controller case study

The Plasma Control System (PCS) is in charge of robustly controlling the evolution of plasma parameters against model uncertainties and disturbances, with the aim of achieving the envisaged goals and performance. The PCS design process follows a System-Engineering approach to support all the design phases, from control algorithms specifications to the verification and validation tests for various components. A case study concerning the design of the Correction Coils Current Controllers is presented in this paper. The aim is to show on a smaller scale the approach that is applied to the entire design of the PCS, by highlighting its effectiveness, from the refinement of the requirements, up to their validation in the simulation environment.