Digital control of multiple discrete passive plants over networks

  • Authors:
  • N. Kottenstette;Joseph F. Hall, III;X. Koutsoukos;Panos Antsaklis;J. Sztipanovits

  • Affiliations:
  • Institute for Software Integrated Systems, Vanderbilt University, P.O. Box 1829, Station B, Nashville, TN 37203, USA.;Department of Electrical Engineering and Computer Science, Vanderbilt University, P.O. Box 1829, Station B, Nashville, TN 37203, USA.;Department of Electrical Engineering and Computer Science, Vanderbilt University, P.O. Box 1829, Station B, Nashville, TN 37203, USA.;Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556.;Department of Electrical Engineering and Computer Science, Vanderbilt University, P.O. Box 1829, Station B, Nashville, TN 37203, USA

  • Venue:
  • International Journal of Systems, Control and Communications
  • Year:
  • 2011

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Abstract

This paper provides a passivity based framework to synthesise lm2-stable digital control networks in which m strictly-output passive controllers can control n – m strictly-output passive plants. The communication between the plants and controllers can tolerate time varying delay and data dropouts. In particular, we introduce a power-junction-network, a general class of input-output-wave-variable-network which allows even a single controller (typically designed to control a single plant) to accurately control the output of multiple plants even if the corresponding dynamics of each plant is different. In addition to the power-junction-network we also introduce a Passive Downsampler (PDS) and Passive Upsampler (PUS) in order to further reduce networking traffic while maintaining stability and tracking properties. A detailed (soft real-time) set of examples shows the tracking performance of the networked control system.