Digital Control of Multiple Discrete Passive Plants Over Networks

TitleDigital Control of Multiple Discrete Passive Plants Over Networks
Publication TypeJournal Article
Year of Publication2011
AuthorsKottenstette, N., J. Hall, X. Koutsoukos, P. Antsaklis, and J. Sztipanovits
JournalInternational Journal of Systems, Control and Communications (IJSCC)
IssueSpecial Issue on Progress in Networked Control Systems

This paper provides a passivity based framework to synthesize 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