Brief paper: Virtual Reference Feedback Tuning for non-minimum phase plants

Authors:
L. Campestrini;D. Eckhard;M. Gevers;A. S. Bazanella
Affiliations:
Electrical Engineering Department, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil;Electrical Engineering Department, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil;Department of Mathematical Engineering, Université Catholique de Louvain, Louvain-la-Neuve, Belgium;Electrical Engineering Department, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil
Venue:
Automatica (Journal of IFAC)
Year:
2011

Citing 6
Cited 0

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Brief Virtual reference feedback tuning: a direct method for the design of feedback controllers

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Technical communique: Extensions to "virtual reference feedback tuning: A direct method for the design of feedback controllers"

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Abstract

Model reference control design methods fail when the plant has one or more non-minimum phase zeros that are not included in the reference model, leading possibly to an unstable closed loop. This is a very serious problem for data-based control design methods, where the plant is typically unknown. In this paper, we extend the Virtual Reference Feedback Tuning method to non-minimum phase plants. This extension is based on the idea proposed in Lecchini and Gevers (2002) for Iterative Feedback Tuning. We present a simple two-step procedure that can cope with the situation where the unknown plant may or may not have non-minimum phase zeros.