On measuring closed-loop non-linearity: A topological approach

TitleOn measuring closed-loop non-linearity: A topological approach
Publication TypeJournal Article
Year of Publication2007
AuthorsTan, G. T., M. Huzmezan, and K. E. Kwok
JournalCanadian Journal of Chemical Engineering
Volume85
Pagination490–505
ISSN0008-4034
Abstract

The focal point of this paper is to develop a measure of closed-loop non-linearity. In this work, the Vinnicombe metric and the Quasi-Linear Parameter Varying representation of a non-linear system are exploited for this purpose. It is expected that the proposed measure can serve as a decision making tool for control engineers when considering whether a linear or a non-linear control strategy should be employed to close the loop for a non-linear system operating in a prescribed range.

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