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Frequency domain multiloop control synthesis for unstable systems: An approach based on μ interaction measure

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3 Author(s)
Swarnakar, A. ; Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB ; Marquez, H.J. ; Tongwen Chen

This paper presents a new practical framework for multiloop controller design in which controllers are designed independently, i.e., a controller in one loop is designed without exploiting information of controllers used in other loops. The method is based on the (block) diagonal approximation of a system that is different from its (block) diagonal elements. The focus of this work is on unstable systems and the approximated systems are obtained by minimizing a scaled Linfin norm for the error systems. This extends the applicability of conventional mu-interaction measure to a more general scenario. The validity of the proposed approach is demonstrated through numerical simulation and application to an industrial boiler system.

Published in:

American Control Conference, 2008

Date of Conference:

11-13 June 2008