Browsing by Subject "Decentralised control"

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Decentralised robust flow controller design for networks with multiple bottlenecks
(Taylor & Francis, 2009) Munyas, I.; Yelbaşi, Ö.; Biberovic, E.; İftar, A.; Özbay, Hitay
Decentralised rate-based flow controller design in multi-bottleneck data-communication networks is considered. An H∞ problem is formulated to find decentralised controllers which can be implemented locally at the bottleneck nodes. A suboptimal solution to this problem is found and the implementation of the decentralised controllers is presented. The controllers are robust to time-varying uncertain multiple time-delays in different channels. They also satisfy tracking and weighted fairness requirements. Lower bounds on the actual stability margins are derived and their relation to the design parameters is analysed. A number of simulations are also included to illustrate the time-domain performance of the proposed controllers.
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Reliable decentralised control of delayed MIMO plants
(Taylor & Francis, 2010-03) Gündeş, A. N.; Özbay, Hitay
Reliable decentralised proportional-integral-derivative controller synthesis methods are presented for closed-loop stabilisation of linear time-invariant plants with two multi-input, multi-output (MIMO) channels subject to time delays. The finite-dimensional part of plants in the classes considered here are either stable or they have at most two poles in the unstable region. Closed-loop stability is maintained with only one of the two controllers when the other controller is turned off and taken out of service.