TY - JOUR
T1 - PI-Type Controllers and Σ-Δ Modulation for Saturated DC-DC Buck Power Converters
AU - Aguilar-Ibanez, Carlos
AU - Moreno-Valenzuela, Javier
AU - Garcia-Alarcon, O.
AU - Martinez-Lopez, Mizraim
AU - Acosta, Jose Angel
AU - Suarez-Castanon, Miguel S.
N1 - Publisher Copyright:
© 2013 IEEE.
PY - 2021
Y1 - 2021
N2 - Departing from analyzing a general input-saturated second-order system, a Lyapunov-based constructive procedure for the output-feedback stabilization of the constantly perturbed DC-DC buck power converter is presented. The proposed scheme also incorporates a Σ - Δ modulator. The obtained control scheme is developed in two parts: a proportional-integral-type family of algorithms devoted to regulating the uncertain system by using measurements of the output voltage and a Σ - Δ modulator dedicated to transforming the control action into a {0,1} discrete-valued signal. This modulator is a kind of a sliding controller, which can be seen as a subsystem with an on-off output. This combination, the PI-type family of controllers and the Σ - Δ modulator, assures the global stability of the closed-loop system, even if parametric uncertainties are presented. The convergence analysis was carried out using Lyapunov's method. The theoretical results are confirmed using real-time experimental tests, which demonstrate the anti-windup scheme and the Σ - Δ modulator efficiency. The experiments consider the saturation of the control input and disturbances, having obtained convincing results.
AB - Departing from analyzing a general input-saturated second-order system, a Lyapunov-based constructive procedure for the output-feedback stabilization of the constantly perturbed DC-DC buck power converter is presented. The proposed scheme also incorporates a Σ - Δ modulator. The obtained control scheme is developed in two parts: a proportional-integral-type family of algorithms devoted to regulating the uncertain system by using measurements of the output voltage and a Σ - Δ modulator dedicated to transforming the control action into a {0,1} discrete-valued signal. This modulator is a kind of a sliding controller, which can be seen as a subsystem with an on-off output. This combination, the PI-type family of controllers and the Σ - Δ modulator, assures the global stability of the closed-loop system, even if parametric uncertainties are presented. The convergence analysis was carried out using Lyapunov's method. The theoretical results are confirmed using real-time experimental tests, which demonstrate the anti-windup scheme and the Σ - Δ modulator efficiency. The experiments consider the saturation of the control input and disturbances, having obtained convincing results.
KW - DC-DC buck converter
KW - Lyapunov's method
KW - experimental results
KW - saturation control
KW - Σ-Δ modulator
UR - http://www.scopus.com/inward/record.url?scp=85100694408&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2021.3054600
DO - 10.1109/ACCESS.2021.3054600
M3 - Artículo
AN - SCOPUS:85100694408
SN - 2169-3536
VL - 9
SP - 20346
EP - 20357
JO - IEEE Access
JF - IEEE Access
M1 - 9335628
ER -