Interaction analysis for decentralized control based on dissipativity

A new interaction analysis for decentralized control is presented in this paper. The proposed method uses (Q, S, R)-dissipativity and passivity to identify the effect of loop interactions on the dynamic control performance achievable by multiloop controllers (in terms of open-loop bandwidth of the plant and multiloop controller). The frequency-dependent upper bounds of the controller gain are also formulated to provide more insights into the impacts of interactions on decentralized control. A case study on the interaction analysis of distillation column is used to illustrate the effectiveness of the proposed approach. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.

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