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Type: Artigo de periódico
Title: Robust H-2 control applied to boost converters: design, experimental validation and performance analysis
Author: Maccari, LA
Montagner, VF
Pinheiro, H
Oliveira, RCLF
Abstract: This study proposes a design procedure and experimental validation for a robust H-2 state feedback controller applied to a DC-DC boost converter modelled as a linear system affected by time-varying parameters lying in known intervals. The parameters considered as time-varying are the input voltage, the load resistance and the operating point duty cycle. A polytopic representation of the system is derived and the controller is designed by means of a convex optimisation problem based on linear matrix inequalities. The conventional H-2 controller is extended to cope with alpha-stability and robust linear quadratic regulator design, providing different strategies to trade-off the magnitude of the control gains and the response of the closed-loop system. Tight correspondences between numerical simulations and the experimental results prove the viability of the application of this technique for this kind of plant. Finally, a robust performance analysis illustrates the capacity of the closed-loop system to reject energy bounded disturbances, with interpretation for the cases of time-varying and time-invariant parameters.
Country: Inglaterra
Editor: Inst Engineering Technology-iet
Citation: Iet Control Theory And Applications. Inst Engineering Technology-iet, v. 6, n. 12, n. 1881, n. 1888, 2012.
Rights: fechado
Identifier DOI: 10.1049/iet-cta.2011.0755
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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