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This article presents a model-free control technique based on an extremum seeking control algorithm (ESC). The idea is to use ESC as a direct controller to minimize the quadratic error. Considering that it is possible to minimize the error to zero, it is then possible to track a reference. In addition, the technique can guarantee operation for different points of application, as well as for time-varying parameters. This technique was tested, through simulations, in a quadruple tank system.

Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mo-MODEL Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mo-ING AND DESIGN Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mo-ING AND DESIGN Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mo-OF Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mo-OF Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mo-A FAST Modeling and Design of a Fast-Dynamic Response Phaselocked Loop Based on Mois enough to achieve an accurate model for the MAF, and presents a controller design technique that results in the minimum settling times achievable for a MAF-PLL with a PI controller. Simulation and experimental results validate the proposed approach.