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Type: Artigo de periódico
Title: Robust ℋ2 Control Applied To Boost Converters: Design, Experimental Validation And Performance Analysis
Author: MacCari Jr. L.A.
Montagner V.F.
Pinheiro H.
Oliveira R.C.L.F.
Abstract: This study proposes a design procedure and experimental validation for a robust ℋ2 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 ℋ2 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. © 2012 The Institution of Engineering and Technology.
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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