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Decentralized pole assignment for interconnected systems

Lavaei, Javad and Aghdam, Amir G. (2008) Decentralized pole assignment for interconnected systems. In: 2008 American Control Conference. Vol.Procee. IEEE , pp. 3601-3607. ISBN 978-1-4244-2078-0.

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Given a general proper interconnected system, this paper aims to design a LTI decentralized controller to place the modes of the closed-loop system at pre-determined locations. To this end, it is first assumed that the structural graph of the system is strongly connected. Then, it is shown applying generic static local controllers to any number of subsystems will not introduce new decentralized fixed modes (DFM) in the resultant system, although it has fewer inputoutput stations compared to the original system. This means that if there are some subsystems whose control costs are highly dependent on the complexity of the control law, then generic static controllers can be applied to such subsystems, without changing the characteristics of the system in terms of the fixed modes. As a direct application of this result, in the case when the system has no DFMs, one can apply generic static controllers to all but one subsystem, and the resultant system will be controllable and observable through that subsystem. Now, a simple observer-based local controller corresponding to this subsystem can be designed to displace the modes of the entire system arbitrarily. Similar results can also be attained for a system whose structural graph is not strongly connected. It is worth mentioning that similar concepts are deployed in the literature for the special case of strictly proper systems, but as noted in the relevant papers, extension of the results to general proper systems is not trivial. This demonstrates the significance of the present work.

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Additional Information:© 2008 AACC. This work has been supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) under grant RGPIN-262127-07.
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Natural Sciences and Engineering Research Council of Canada (NSERC)RGPIN-262127-07
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INSPEC Accession Number10067919
Record Number:CaltechAUTHORS:20100721-134119598
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19144
Deposited By: Tony Diaz
Deposited On:30 Jul 2010 21:49
Last Modified:08 Nov 2021 23:50

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