DC-DC Supervisor Fuzzy Controller Design for a Boost Switching DC-DC Regulator
No. 28 (2008-11-01)Author(s)
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Spartacus GomárizDoctor Ingeniero de telecomunicación. Profesor titular. Departamento de Ingeniería Electrónica, Escola Politècnica Superior d’Enginyeria de Vilanova i la geltrú, Universitat Politècnica de Catalunya. Vilanova i la geltrú, España. Spartacus.gomariz@upc.edu
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Francesc GuinjoanDoctor Ingeniero de telecomunicación y profesor titular. Departamento de Ingeniería Electrónica, Escola tècnica Superior d’Enginyeria de telecomunicació de Barcelona, Universitat Politècnica de Catalunya. Barcelona, España. guinjoan@eel.upc.edu
Abstract
A complete design of a takagi-Sugeno-Kang (tSK) fuzzy controller for a PWM boost DC-DC switching regulator operating at different steady-state voltages is presented. This controller performs a supervisory role through its region characteristic. On the one hand, the controller assigns different linear control laws according to the steady-state voltage value and limits their application to small-signal perturbations. On the other hand, the controller ensures a proper start-up to reach the desired steady-state voltage by means of properly saturating the PWM according to sliding-mode control principles. As a result, both an equalized small signal behavior and a controlled start-up are achieved for different steady-state voltages, thus extending the features of the regulator. Simulation and experimental results carried out on a current-controlled boost regulator operating at two different steady-state