Walsh, G.C.
Beldiman, O.
Bushnell, L.
Dept. of Mech. Eng., Maryland Univ., College Park, MD;
This paper appears in: Control Applications, 1999. Proceedings of the 1999 IEEE International Conference on
Publication Date: 1999
Volume: 2,
On page(s): 1448-1453 vol. 2
Meeting Date: 08/22/1999 - 08/27/1999
Location: Kohala Coast, HI, USA
ISBN: 0-7803-5446-X
References Cited: 7
INSPEC Accession Number: 6468553
Digital Object Identifier: 10.1109/CCA.1999.801185
Posted online: 2002-08-06 22:17:22.0
Abstract
The defining characteristic of a networked control system (NCS) is
having a feedback loop that passes through a local area computer
network. This paper considers nonlinear systems controlled in this
manner, and demonstrates that for sufficiently high transmission rates,
the network may be considered transparent. Three methods of scheduling
data packets are compared: a static scheduler (token ring), the
try-once-discard (maximum-error-first) scheduler with continuous
priority levels, and the try-once-discard scheduler with discrete
priority levels. The third method is of particular interest when only a
small number of bits are available for collision resolution. Asymptotic
stability is guaranteed in the first two cases, and ultimate uniform
boundedness in the third. In the final section, simulations demonstrate
the theoretical results. The contributions of this paper are two-fold:
first, it extends the earlier results on NCS to nonlinear systems, and
second, it allows for finite word-length message identifiers
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