Geometric tuning of controllers from a data-driven approach
Keywords:
Boost power converter, Data-driven control, Experimental Bode, Stabilizing set.Abstract
PRELIMINARIES: Fine tuning of PI controllers implies the explicit knowledge of a mathematical model for the system as well as trial and error calculations. GOAL: To perform calculation of parameters of PI controllers by means of a data-driven approach based on frequency response data. METHODOLOGY: The basis of the proposed approach is the geometrical interpretation for stability margins and their relationship to the stabilizing set of controllers achieving performance specifications. Application on electrical systems involving boost power converters is employed as illustrative example of the proposed technique. RESULT: An experimental Bode diagram allowed the calculation of control parameters without an explicit knowledge of system analytical models. CONCLUSION: Regulation of electrical variables of the power converter was successfully verified by numerical simulations and experimental tests, satisfying limit constraints on saturation levels for practical stabilizing sets.
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