Virtual Reference Feedback Tuning for non-minimum phase plants

Citation:
Campestrini, L, Eckhard D, Gevers M, Bazanella AS.  2011.  Virtual Reference Feedback Tuning for non-minimum phase plants. Automatica. 47:1778–1784., Number 8

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.

Notes:

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