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Stabilization of large-scale distributed control systems using I/O event-driven control and passivity

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3 Author(s)
Han Yu ; Dept. of Electr. Eng., Univ. of Notre Dame, Notre Dame, IN, USA ; Feng Zhu ; Antsaklis, P.J.

This paper examines a passivity-based I/O approach for stabilization of large scale networked control systems (NCSs) with event-driven communication. We use a cellular model to model the large scale NCSs and assume that each subsystem is an output feedback passive (OFP) system. We propose a distributed event-driven communication strategy, where each subsystem broadcasts its output information to its neighbors only when the subsystem's local output novelty error exceeds a specified threshold. Based on the proposed event-driven communication strategy, the studied large scale NCSs is finite-gain ℒ2 stable in the presence of bounded external disturbances. The triggering condition is related to the topology of the underlying communication graph. We also provide a way to analyze the time interval between two consecutive communication broadcasts(the inter-event time). Simulation results are shown at the end.

Published in:

Decision and Control and European Control Conference (CDC-ECC), 2011 50th IEEE Conference on

Date of Conference:

12-15 Dec. 2011