Study of the Influence of Prefiltering on the Robustness of GPC with Structured Perturbations  

Oleh:

Mañoso, C. ; Hernández, R. ; de Madrid, A. P. ; Dormido, S.

Jenis: Article from Article
Dalam koleksi: Final Program and Book of Abstracts: The 4th Asian Control Conference, September 25-27, 2002 (Sep. 2002), page 664-669.
Topik: GPC; Structured Perturbations; Polytope;
Fulltext: AC021527.PDF (273.38KB)

Isi artikel

In this paper the model-process mismatch, represented by structured perturbations, with a GPC controller will be considered. Under this consideration it will be shown that the closed loop characteristic equation is a polytope of polynomials. Using this result the influence of the prefilter polynomial T on the robustness will be analysed. The main conclusion is that the recommendation generally admitted in the literature for choosing the value of T, in order to improve robustness, does not always work adequately because, sometimes, it can lead to smaller stability regions or, being the stability region bigger, the stability hypersphere is actually smaller.

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